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Ty ue
THE OEDOGONIACEAE
A MONOGRAPH
Including all the Known Species of the Genera
Bulbochaete, Oedocladium and Oedogonium
By
LEWIS HANFORD TIFFANY, M. Sc., Ph. D.
Associate Professor of Botany
The Ohio State University
fe, SS @
fe 2% Pee
Xe)
aXe, i Se
ei”
1930
PUBLISHED BY THE AUTHOR
COLUMBUS, OHIO
THE SPAHR & GLENN COMPANY
PRINTERS
COLUMBUS, OHIO
FOREWORD.
For many years the only available keys to the Freshwater
Algz of North America were those published by Francis Wolle
about 1887. These were in larger part transcriptions of European
descriptions often based on a single collection. Moreover, at
that time it was a common practice to name specimens on the
basis of vegetative characters or of immature reproductive
structures. Consequently many of the records are erroneous
and many others are questionable.
In 1909 Frank S. Collins published a monograph of the
Green Algze of North America. He not only added many
species and records to the North American algal flora, but also
corrected many of the previous errors in nomenclature and in
the locality records, and brought the taxonomy of the green
algze in America into harmony with the best usage in Europe.
Collins’ keys stimulated a wide interest in the green alge in
this country, and led to the publication of many local lists and
papers describing new species.
In the determination of algae, however, descriptions without
plates are frequently difficult to interpret, and the greatest
need of American students today is a series of illustrated
monographs of the various families and orders.
The world wide distribution of many of the freshwater
alge, and the possibility that a species described from Australia
may be found in Ohio has made it desirable that the monographs
should attempt to cover all the described species. Too often
the literature of a group is widely scattered and many of the
papers are in obscure journals quite inaccessible to the average
student.
In 1900 Karl E. Hirn of Helsingfors, Finland, published in
Latin and German a monograph of the Oedogoniacee that has
been a model and inspiration for all algologists, but this volume
and its supplement are now difficult to secure. Moreover
many new species have been described and the descriptions by
Hirn in many cases have been emended. It has seemed there-
fore very desirable to publish descriptions and keys to all
5
the known species of Oedogoniacez in English. Dr. Tiffany’s
extensive acquaintance with American collections, and the
species found in European exsiccati over a period of fifteen
years have given him an excellent foundation for a critical
view of the group.
It is the hope of the Department of Botany at The Ohio
State University that this monograph will be followed in the
near future by a monograph of the Zygnemales, and subse-
quently of other groups of the filamentous alge.
EDGAR N. TRANSEAU.
TABLE OF CONTENTS
PAGE
2) Ste aeons ASi6 Rea gE Re ARP or at 9
Heri NAee LOI to oer ee a ere ee tees Sie aiteah sch Ta egw 4 tht 11
Cell Structure, Reproduction, and Life History............ 12
Pesocieiny arid Disimibttions #:agenas4ccslescd< os eee ao. 22
haxononuc and Systematic: (reatment 9-4-2022... 5224.25 24
iewherlanuihy"Cedogoniacedes. Wen ae ass. 2 8 Sts ee te 2f
aig SAID ewes on loyae ee, ees Mea oer See, a a ea Dif
fee eiMeyan@mube (Genera ss... ees 2 |. Peete ieee eale es 27
Pee MeneG Cats ve MDOCHACLE. < 45582... tes desen es bie sss 2d
Zi: DESC NG) 0 ee ae ae Re ek: eae ee ar 27
b. Key to the Species, Varieties, and Forms.......... 28
ec. Whe Species, Varieties, and Forms................°. 30
me elbnene ents Ocdocladiunay): a... 2 poe oper) sae een: 51
Fs ul DYSSICLE ONTO) se geee trees eee ROME OME A REBER s ta Seea eR A ae a!
DMNBINMeNEL OREM Ee SPCCICSs o..0 64> a2: petra eyeenee oe of 51
ER, ec IP orS (SONS a ee a ie oY SCAM, 2 a ue er ce 51
Ae the Genus Ocdor entities: £2. 2.250.604 oa ee = 53
Ep B Yes an ialee, 5 & cee e CC Reon eee ee ae 2 58
b. Key to the Species, Varieties, and Forms.......... 53
¢; The Species, Varieties, and Forms.....2..2........ 65
den species bmpertect lynKinown 25.72 45: se ae. eae 159
iabplccor pynonyms: dsalbochacte: «; 22..6..2 855.65 <2 tea: L73
Manicon synonyins: Ocdogonium: . 626224. .ce see se om eae 174
EL SISG TEAC OOS C0 OUR Be) aces pcre A teagan eee a
[SST S CEIVED Ae Re oe a nC ee ee 184
LTETCVESE | 3 US cag. lccalle eater a See OR ieee ce Det eel ares ers Sel a a ee 185
JEAGTRESS RG Rees eG SUE ie oe uC a Og toe 189
7 PIHIIE
ACKNOWLEDGMENTS.
In attempting a complete report of a group as large as the
Oedogoniacez, one encounters numerous difficulties. The liter-
ature is bulky and in many languages. Type specimens are
unavailable in some cases. Thanks, however, to the very
careful work of Hirn (1900), many forms are perpetuated by
extremely accurate and representative drawings. Some of the
difficulties are matched, on the other hand, by the relative
constancy of the characteristics of the species as they occur in
aquatic habitats the world over. Many species appear in the
writer’s own collections.
It is almost impossible to give full acknowledgment to all
who have assisted in making this monographic report possible.
The writer has examined the material distributed in the Phy-
cotheca Borealis-Americana and important collections generous-
ly supplied by the following: Prof. E. N. Transeau, Ohio State
University; the late Prof. O. Nordstedt; Prof. R. B. Wylie,
Iowa State University; Prof. G. E. Nichols, Yale University;
Prof. F. E. Lambert, Tufts College; Prof. W. R. Taylor, Uni-
versity of Pennsylvania; Prof. C. J. Chamberlain, University
of Chicago; Prof. I. F. Lewis, University of Virginia; Mr. G. H.
Wailes, British Columbia; Prof. Alma B. Acklev, College of
the City of Detroit; Prof. B. B. MclInteer, University of
"Kentucky.
Data on distribution of the genus outside of the United
States other than that secured from the literature have been
supplied by Mr. G. H. Wailes, British Columbia; Prof. O. Borge,
Srocknolar: ror Kk. M.“Strom, Oslo; Prof. H: Skuja, Riga;
Prof. N. N. Woronichin, Leningrad.
The section on Bulbochaete in this report has previously
appeared, in substance, in the TRANSACTIONS OF THE AMERICAN
MICROSCOPICAL SOCIETY (Tiffany 1928). The text and plates
dealing with that genus are incorporated herewith with the
permission of the Society, kindly extended through its Secretary,
Professor H. J. Van Cleave. My thanks are due Professor I. F.
Lewis, University of Virginia, for the loan of his unpublished
manuscript on the genus Oedocladium. Professor Lewis is
9
responsible for the emended description of the genus and for
three of the four species now known (two are previously un-
described).
I am particularly indebted to my colleague, Professor E. N.
Transeau, who has very graciously placed at my disposal all
his notes on Oedogoniacee recorded during his long study of
freshwater alge in the United States. He has offered many
valuable suggestions during the fifteen years this study has
been in progress.
Leb t
Department of Botany, The Ohio State University,
Columbus, Ohio, January 2, 1930.
10
THE OEDOGONIACEE
INTRODUCTION.
Perhaps the most sharply circumscribed and clearly delimited
group among the green alge is the family Oedogoniaceee. The
members of its three genera—Bulbochaete, Oedocladium, and
Oedogonium—are not only easily separable from other fila-
mentous algz but also readily distinguishable from each other.
The rather rigid vegetative cells, the prominent reproductive
organs, the large zoospores each with a crown of cilia at the
anterior end, the reticulate chloroplasts, and the attached
habit are characteristics of the family.
The filaments of Bulbochaete are branched and composed of
cells each bearing at its enlarged upper extremity a laterally
placed hair or seta. The sete are bulbous at the base, hollow,
and frequently greatly attentuated, sometimes reaching a
millimeter in length. Oedocladium is also branched but is
devoid of hairs. Species of Oedogonium are unbranched and
in common with Bulbochaete possess holdfast cells that provide
attachment for the plants. Oedocladium hazenii* and species of
both Oedogonium and Bulbochaete are aquatic. The remain-
ing three species of Oedocladium are terrestrial.
The family Oedogoniaceze was established by De Bary in
1854; the genus Bulbochaete by C. A. Agardh in 1817; Oedo-
cladium by Stahl in 1891; and Oedogonium by Link in 1820.
The most noteworthy contributors to the taxonomy of the
group, other than those above, have been Pringsheim, Wittrock,
Nordstedt, and Hirn. Since 1900 a number of algologists
have added to our knowledge of the family by descriptions of
new species, further notes on life histories, and data on geo-
graphic distribution. A list of such workers includes Hirn and
Hallas from Finland; William West, G. S. West, Fritsch,
Carter, and Hodgetts from England; Borge from Sweden;
Wille and Strom from Norway; Pascher and Heering from
Germany; Skuja from Latvia; Collins, Transeau, Lewis, and
Tiffany from the United States. There have been many other
*In the Index the name of each new species, variety, or form is preceded by
an asterisk.
11
12 TEE OBR DO'GONTA CEASE
students of this algal family, and some of their names are found
in the bibliography near the end of this monographic report.
Some idea of the relative sizes of the three genera of the
Oedogoniacee may be gained by a numerical recital of the
composition of each. The genus Bulbochaete is composed of
48 species, 15 varieties, and 7 forms, with 3 additional species
having incomplete descriptions. In Oedogonium there are
195 species, 76 varieties, and 38 forms; in addition there are 41
species and 3 varieties incompletely known. Oedocladium, by
far the smallest, has only 4 species recorded to date.
Although an Oedogonium, a Bulbochaete, or even an
Oedocladium can be recognized on vegetative characters alone.
the identification to species is impossible, except in a very few
cases, without reproductive organs. Such unusual forms as
Oe.* undulatum, B. horrida, Oe. nodulosum, or Oe. reinschii
are perhaps always recognizable in vegetative states, but such
species are few in number.
The comprehensive reports of Pringsheim (1858), Wittrock
(1874), Hirn (1900, 1906), and Heering (1914) are not readily
available to many students of the alge, and their points of
emphasis have been necessarily European. The early Ameri-
can accounts of the Oedogoniacee by Wood (1872) and by
Wolle (1887) are quite unreliable. The work of Collins (1909,
et seq.) made available much European literature and was the
first American publication on the green alge that was really
trustworthy. Perhaps to Collins should go the credit for the
initiation of real interest in freshwater alge in North America.
Unfortunately his papers were inadequately illustrated. It is
hoped that furnishing a complete English treatise of the family
Oedogoniacez, including in addition to the taxonomic consider-
ation, a discussion of the more important features of structure,
reproduction, and distribution, will not only aid the student
in the study of these common alge but will stimulate added
interest in algology generally.
CELL STRUCTURE AND REPRODUCTION.
The cell wall of the Oedogoniacee exhibits a rigidity not
common to other filamentous Chlorophycee. The heavy
cellulose layer is covered peripherally with pectose, and upon
*The abbreviation Oe. as used in this paper refers to the genus Oedogonium,
and not to Oedocladium. When the latter is meant, the abbreviation is O.
THE OEDOGONIACEAE 15
this is found in varying amounts another compound, resembling
chitin. In Bulbochaete and Oedogonium the latter substance
does not appear on the holdfast cell or dwarf male at the points
of attachment. The cell may frequently be so heavily incrusted
with lime that identification is not possible in that condition.
The addition of warm lactic acid removes the calcium carbonate
without undue change to the filament. Epiphytic small alge,
including species of Oedogonium and Bulbochaete, are com-
monly found attached to the rigid filaments. Fungal parasites,
particularly certain Chytridiales, attack the plants both
internally and externally.
The vegetative cells are uninucleate with an elaborate
parietal, reticulate chloroplast having one to many scattered
pyrenoids. The chloroplast is quite variable in form, the
network being considerably attenuated or hardly visible in
the compact cylindrical mass (Carter, as reported by Fritsch
and West, 1927).
A rather peculiar characteristic of the family is the method
of division of the vegetative cell which results in the so-called
“‘apical caps.’’ Previous to the actual division there appears
a ring-like thickening of the inner wall of the cell near its upper
extremity. The growth of this ring ruptures the old wall
circularly, and the outer layer of the ring becomes the new
piece of cell wall. In the meantime nuclear division is followed
by the formation of a cross wall at the middle of the cell, not
connected at first with the cylinder. Later the septum assumes
a permanent position near the lower part of the ruptured wall.
The upper cell thus formed has a wall made up chiefly of the
stretched ring, while the wall of the lower cell consists almost
wholly of the lower part of the old cell membrane. The uprer
cell, however, has at its upper extremity a part of the old cell
wall which projects slightly, forming the cap. This apical
cap is an excellent diagnostic character of the genus Oedo-
gonium, although in some of the smaller species it is difficultly
visible; and the number of caps in each cell denotes the number
of divisions it has undergone. (Cf. Pl. LXI, figs. 598-600).
In Bulbochaete there is rarely more than one apical cap to
each cell, indicating, as will be explained later, that vegetative
division in that genus occurs usually but once in a cell. (Cf.
Pl. X, fig. 99).
In Oedocladium usually only the terminal cell undergoes
division as outlined above for Oedogonium. Intercalary growth
14 ee OLE DIO GON A CHE AE
is apparently uncommon. The cap (or successive caps) may
remain at the top of the terminal cell (Pl. LXIII, figs. 616 and
617 and 621; Pl. LXI, fig. 602) or be pushed aside, adhering
to the side of the filament (Ml. LXII, fic. 611; PL LXIM,
nia 622),
The nuclear phenomena accompanying cell division were
early investigated by Strasburger (1880) and Klebahn (1892).
More recently Tuttle (1910) has compared mitosis in Oedogon-
ium with that seen in higher plants.
A single multiciliate zoospore is formed from the entire
contents of a vegetative cell. Rarely a small amount of
protoplasm is visible in the old cell after the emergence of the
zoospore. The formation and liberation of the zoospore can
readily be followed if the plants are brought into a warm room
and observed under the microscope. The protoplast of the
cell contracts slightly, and near one side appears a colorless
area. A circular rent soon appears near the upper extremity
of the cell in the vicinity of the apical cap. The mass then
passes with a slow steady movement through the opening in
the wall, being considerably constricted at the place of exit.
Zoospores are formed from any cell of the filament except the
holdfast.
Upon release from the cell, the zoospore assumes a spherical
or ovoid shape. It is at first surrounded by a thin gelatinous
envelope which rather rapidly increases in volume and trans-
parency and finally disappears. At the anterior end of the
forming zoospore appears a colorless area, around the base of
which occurs the crown of cilia. The zoospore is active for a
short time, its movements becoming progressively less and less
until it comes to rest. The cilia are absorbed and the clear
anterior end becomes the attached part of the holdfast cell
(Cf. Pl. X, figs. 84-92). Sometimes growth of the zoospore
begins before movement has ceased. Upon germination, re-
peated cell division occurs in the manner described above,
except in those species where the first division does not result
in the formation of a ring. In Oedogonium the sporeling thus
formed develops into a filament by intercalary growth.
The development of the germinated zoospore in Bulbochaete
involves variations that deserve separate mention. The basal
cell formed from the germinated zoospore is usually the only
one capable of division, as far as the main axis is concerned.
In some of the forms with ellipsoid oospores, however, inter-
fatees OVE DOIG ON Tf A.C HAE 15
calary growth has been noted. The first division is of simple
type, without a ring formation. The upper part of the cell
is separated from the lower by a circular rent, but no new
membrane develops between the two parts. As the new wall
grows upward, the separated part is pushed to one side as a lid.
The upper new cell grows out into a long tubular bristle with
a swollen bulbous base. Subsequent divisions occur with the
regular ring formation, and each new cell is intercalated between
the basal cell and the next one above. The upper cell of each
filament is therefore the oldest one. A lateral protrusion of
each cell at its apex is cut off, developing into a hair. It is
thus seen that the terminal cell bears two hairs, the other
cells one each. Nearly every cell of Bulbochaete has two
apical faces, one bearing a hair (or a cell of a side branch),
the other the next upper cell of the main axis. Every cell of
the principal axis of the filament, except the basal one, may
cut off by an oblique division a lateral cell which becomes the
basal cell for a side branch. By repeated divisions, first of the
simple type and subsequent ones with ring formation, as noted
above, this secondary basal cell (which of course is the primary
basal cell of the side branch) forms the branch. Tertiary
branches are formed similarly from the secondary ones, and so
on through further branching. The mode of growth of the
main axis is thus repeated by the side branches (See Plate X,
figs. 93-99).
The germination of a zoospore of Oedocladium is in many
respects unlike that of either Oedogonium or Bulbochaete.
The first cell formed upon germination develops into (1) the
green filament with the rhizoidal cell forming as a branch;
or (2) the rhizoidal filament with the chlorophyllose cell as a
side branch; or (3) the green filament with the branch cell also
green; or (4) a green filament without early branching. (Cf.
Peete ne. 62 Pl Pooh, fie..623)-~ Théeformation of a
branch in Oedocladium occurs by:the development of a circular
rent in the upper extremity of a vegetative cell, forming an
upper short ‘‘lid’”’ and a lower, much longer cylindrical piece.
Through this rent the protoplasm of the forthcoming daughter
branch cell with its initially thin wall protrudes. A new wall
separating the branch cell from the cell of the main filament is
then developed. This wall is attached to the juncture of the
upper extremity of the cylindrical piece of the primary cell and
the lower end of the branch cell, on the one hand, and to the
16 Pee OE DOICONTACEA'E
original upper transverse wall of the primary cell, on the other.
(Cf. Pl. L.XTI, figs. 606 and 612; Pl. EXITh figs, 616 and 623).
Sexual reproduction of a rather advanced order has been
observed in most species of the family. The position and
relation of the oogonia and antheridia are used as classificatory
items in all three genera. If oogonia and antheridia occur on
the same filament the plant 1s monoecious (Pl. IX, fig. 69;
Pl. XV, fig. 145); if on separate filaments, dzoecious (Pl. XX XIII,
figs. 291 and 292). Oe. varians, Oe. trioicum, and perhaps a
few others are both dioecious and monoecious. If dioecious,
the male filaments may be about equal 1n size to the female,
and the species is macrandrous (Pl. XXX, figs. 262 and 263).
If the male plants are few-celled, much smaller (‘‘dwarf males”’
resulting from germinating androspores) and epiphytic on
the female plant, the species is nannandrous (Pl. II, fig. 17;
Pl. LII, fig. 494). If the dwarf males have arisen from the
germination of androspores liberated from androsporangia
occurring on the same filament with the oogonia, the alga is
gynandrosporous (Pl. V, fig. 37; Pl. LIV, fig. 509; Pl. LXII, fig.
606); if the androsporangia are formed on separate filaments
from the oogonia, the alga is zdioandrosporous (Pl. VII, fig. 53;
Pl. XLV, figs. 434 and 435). A few species among the nan-
nandrous sections are both gynandrosporous and idioandros-
porous. ‘The dwarf males form on the suffultory cell (Pl. VII,
fig, 52: Pl. L, fig. 482), or on the oogonium (Pl V7 mesa;
Pl. LIV, fig. 508), or rarely scattered on vegetative cells (Pl.
XLV, fre8 455).
In Oedogonium and Oedocladium a single division of a
vegetative cell results in an oogonium and a suffultory (‘‘sup-
porting’’) cell (Pl. LXIV, figs. 638-640). The latter (in
Oedogonium) may by subsequent divisions form a series of
oogonia (Pl. LIX, fig. 577). Flat discoid cells resulting from
repeated transverse divisions of a vegetative cell are antheridia
(in the monoecious and macrandrous species) and andro-
sporangia (in the nannandrous species). No seriate oogonia
are recorded for the species of Oedocladium. :
In Bulbochaete oogonia are developed singly, never in
series. An oogonium arises by a double division of a vegetative
cell which thus results in two suffultory cells. After the first
division the septum becomes fixed near the middle of the old
sheath-like wall “‘so that the membrane of the upper segment
is formed by a short cylindrical piece of the latter and above
ie Of DOGONITIACE AE 17
that by the stretching thickening ring which is becoming bulged
out, forming the oogonium. A second thickening ring then
develops in the median region of the young oogonium followed
by a transverse rupture of the wall at this point; the septum
formed in connection with this second division lies on a level
with the top of the first-formed sheath, so that the supporting-
cells are included in the latter. This curious development .is
responsible for the fact that the wall of the mature Bulbochaete
oogonium can nearly always be seen to consist of three pieces.”’
(West and Fritch 1927, p. 219). (Cf. Pl. LXIV, figs. 641-645.)
If the lower of the two suffultory cells is the longer we speak
of the division as supreme, superior, or supramedian, depending
upon the relative lengths; if the upper is the longer of the two,
the division becomes inframedian, inferior, or basal; if the two
are equal in length, the division is median. In some species of
Bulbochaete the position of the division is variable and cannot
always be depended on as a distinctive diagnostic characteristic.
If the two divisions are at right angles to the long axis of the
vegetative cell, the oogonium is said to be erect; if one division
is oblique, giving one suffultory cell a five-sided, or five-angled,
appearance (viewed in optical section), the oogonium is patent.
In members of the genus with globose (or nearly so) oogonia,
the upper and not the lower suffultory cell is five-angled, while
in those with more ellipsoid oogonia the reverse is true. In the
latter case the upper cell is quite small, or may not be visible.
A patent oogonium is always formed by a division of the basal
cell of a side branch, with which may be associated a bulbous
hair, an androsporangium, an antheridium, or rarely a vegetative
cell. An erect oogonium on the other hand forms from a division
of some vegetative cell other than the basal one. In the
globose forms of the genus, patent oogonia are common while
erect oogonia occur only in a few species. Among the ellipsoid
forms both kinds are found. (Pl. LXIV, figs. 641-645).
The oogonium contains a single egg and varies considerably
in shape, being largely ellipsoid, ovoid, globose, or some variation
of these shapes. It is usually of noticeably larger diameter
than the vegetative cell, although in Oe. capillare and in a few
others the difference is not great. The oogonium wall is rarely
internally ribbed (as in Oe. acrosporum), punctate (as in Oe.
minus), plicate (as in Oe. megaporum, Oe. platygynum) or
provided with a transversely disposed ring of conical warts
(as in Oe. itzigsohnit); in most species it is smooth. The
FA QelCAly
ik 0° Hoe
a - e. Ge
sunnng
18 THE OEDOGONTACEAE
suffultory cell may be noticeably larger than the other vegeta-
tive cells, or of the same diameter (Pl. LXIV, figs. 639-640).
The opening in the wall of the oogonium may be a pore, either
round and mouth-like, or rimiform, in which case the plant is
designated as poriferous. An upper part of the oogonium may
separate from a lower part, forming a lid; such species are
operculate. The position of the pore as well as that of the
operculum is quite constant for the species and is of considerable
diagnostic value. The pore may be superior, supramedian,
median, inframedian, orinferior. The division of the operculum
TABLE I.
Ready reference to illustrations of the kinds of ornamentations of oospore walls
found in the Oedogoniaceae. It will readily be seen, upon examination of the
figure, whether it is the middle or outer layer of the oospore wall with
ornamentations.
OosPoRE WALL SPECIES PLATE FIGURE
NVR as 3 Ge oa OS AVOCA CHSTS a= a eee eee LXIII 614
Areolate:...< 4... Oenarcolatunier a. epee XXVIII 248
Dentate: 5. ctas 12 Oe NClevcaniurie
Vegetative cellsy15-20><45—-100us . a5. 1. . oe aes 17. B. polyandria
20. Vegetative cells 17-22X54-88y.............. 17a. B. polyandria f. notabilis
21. Vegetative cells less than 12u in diameter............... 48. B. spirogranulata
Zi Vegetative cells more than\ 12, in diameters... 40a eee een 22
22 MONOCCIOUS!. 05. cccc ace Sak hiescecms RAS On BE ere 23
22: Dioeciouss nannandrousy.2.04 6.2 eae ee ee eee 29
22. Reproductive structures imperfectly known.............. 49. B. brevifulta
235) Poreof oogonitim» less than ow wider. meet cee ee 24
23.) Pore of oogoniumi more than du wide... s25+ 456) o ae 3. B. megastoma
24. Vegetative cells l=idiametersilonee-- eee ee eee eee 25
24. Vegetative cells 1/-2 diameters long /).9.507. 5.5. 6ek eee ee 26
204 Oogonitim~ 24-28 u inidiamebenaaaseaetiase een eee eee 4. B. basispora
25. Oogonium 28-34u in diameter......................2a. B. monile var. robusta
{+ Some variations of B. nordstedtii and B. polyandria may be sought here.
BULBOCHAETE 29
Ph Oosonium Tnesulanlyaellipsoide naa. cs-.cere css. o5- ce oe © 5. B. debaryana
Zoe Oozonumicylindric to oplong-ellipsoide tec... s + douse) tees es eee a:
D7 enathvot cogontitim 4048p)... 2 cae one sem cee 6a. B. mirabilis £. immersa
iAMUCH AG hkOL OOZONIIMAA —OOM ae «cecil a Meee Meee eis seve ee, oe edu cnn dies ce betes 28
28. Diameter of vegetative cells 13-l6u.......... 6b. B. mirabilis var. gracilis
28. Diameter of vegetative cells 15-20u..........2........-.-. 6. B. mirabilis
POBOospore walllismooth= Veeco tcs ook cst tere ae lae es Raat PSE Acs heetcns 30
Pi MaEpULeayallceromiemlateas:. Hose aeons ier de te Wad tenes es Sneed aes wes 32
Zi wOospore wall reticulate-scrobicilates./). Aik ecsec ceed i ek cee es 18. B. gigantea
SEO CVS Shenae cyl lire oY 2X6 | oc IERS CPIE So G o oe en 41
BOM Divistonomsmirtultonmy cellubasalure .sasassaace. + 6s. 3 19. B. diamesandria
20S Division of suinul tomyacelll median! on nearly. So: . 53... 44.6.0. cece ee ss 31
30. Division of suffultory cell superior............... 22a. B. sessilis f. glabra
Slem@Oorontam abomt4G X44 yes cles 2 oe aietroers oars cee ee ahe 20. B. elachistandria
Bree Moroni 25-04 X 43 ier oe oss es omen athe © cin plsnruibven's eleres wale « 21. B. obliqua
Spr, “Dikenaakeqnere yt roretoranobaa, A000 ie, daa hae comics 6.0. On ORI e SERGI icrcace aire eee 33
SZ Diameter Gr OOZOnilina GO=cUmen scene oan ie ac dae oe Sew ac eens aes 38
338. Division of suffultory cell supreme............. 25a. B. dispar var. ripartiana
DOMED inistOMmmomSuimmltory Cell SUpeMOLs aioe oie cele es sesso se hem ane 34
33. Division of suffultory cell supramedian, median, or inframedian............ 35
Boe Divisfoncomsuibiul tory: cell ibasall.,..35:..5. sacieieciee ee aes: os 9. B. brebissonit
q4-.Ooconum subguadrangular-slobgse. .1- 54.6 424-ee a: os. 22. B. sessilis
SA Ooronium stiodepressed-slobose.. .4.--s ace ase eaeie ee os - 25. B. dispar
Meee FTE MOT OISE MEER. Siete orci cn == seein cars wes Sa emo ato gs kee ee eso 36
Pmlici@andEn@spOROUSHeL 4 -wiclseet ais ois o,s0ue Cee 2 Sem Spelt rear re 31. B. congener
SO Diametemo- oozonmumr4O—ollin. 550 |... ayn). cide Pe ae) ereuene (ore ss eles 37
BOs Diameter OOO ZOMITMALO2—OOp a. 6 scl. «+o - eben ae eee ea 28.. B. crassa
Sieviesctative cells [2 diameters long. .: ......seedqeee+ sce s< 30. B. quadrata
37. Vegetative cells.2-5 diameters long............2........ 13. B. subintermedia
SSE Gaunt GijOs POROUS ar eres eisicss eer hae + aces eee thse Ra ere Menage roa - 39
OMG O att GrOSPOLOUS My facts Ooroniuin broadly ellipsoid, fo ovoid: 2.2... 2.056066 6ee eas oe es ae 50
AD STOMOOSMOLEISIMOOtM <2 sac c ce cles fe alee ee age oe be ae 40. B. rhadinospora
AD eet OSpOM OOSPOLeeLrentla tes. 0.26 oth eee wens ate 40a. B. rhadinospora f. antiqua
50. Ribs of oospore coarsely serrate or crenulate........ 2 39 B. lagcensis
HUsiadbs OfOoSpore dinelysserrate OF SMOOtM (0... 6... 5056 - eine Ae le sees oe 51
iene ative Cells, US 2527-0. 5 aos rea om ie ork tas tee nite Oe eee 41. B. minor
51. Vegetative cells 15-22 22-66y.................-. 41a. B. minor var. germanica
SUMO ont 29—3 1 IEG IATE LEI... =. - os ellaso sae eee he ek eee tse 53
52. Oogonium 38—45yu in diameter........... 40b. B. rhadinospora var. litoralis
SO OSOMUTINAl—OOW AMMGIAIMELCL Me +. secicic sees ieeion c Aelce oes ce oes oe tke 54
pe Oo onium. o6-G0u In GiamMetenrs ....-c0 seedae tet ese ce wee 42. B. bullardi
HP A OOSONMNNOS=O2 patel CIAIMETEL s..ocsycdce conse kone oe es ee ome cele seudinle ss 58
30 THE OEDOGONINGE AE
53) sRabS OMOOSPOre SMOOTH. ..;\.... 2s doan wee ee eee 40. B. rhadinospora
532 Rabsloloospore crentilates: 5... ice eee eee r= 40a. B. rhadinospora f. antiqua
HAreViesetativecells 19-27 in diameteros- caer eee cero ee en eennee 55
54. Vegetative cells 27—30u in diameter..................... 43. B. denticulata
55 Oogonium:41—46u imdiameter. 4). sree Pein ees elena ee 44. B. affinis
Hs Oozonium 46-h6u in diameter... ceemateramine a. eminence eae ee ere 56
56. Vegetative cells! 19—-25<40 100 wiry s-ncteieveen er toreitere aie ina eee ee 57
5G. wWesetativecellls aibouic iota ere ataein eee 45. B. anomala
Dieekabs of oospores broadiyadenticulates seeds er eee tee 46. B. insignis
57. Ribs of oospores reticulate-denticulate......... 46a. B. insignis var. reticulata
58e Oogoniumeloboseaanwaeo ee Tee rece 24. B. alabamensis
58: Oogonium py ritonitysss seer ec acter ty seem ere 32. B. pyrulum
Hs. Oovconmumpellipsoidee eter eee etter te 47a. B.imperialis var. regalis
HO Vieretative cellsyblood-redsinicolotas.. + eae 50. B. sanguinea*
HO Viecetativercellsmmedianily splicatesn-. -caeu icici aster eee 51. B. horrida*
1. B. nana Wittrock.
(Pl. IX, fig. 75.)
1872, p. 7, Pl. 1, fig. 9; 1874, p. 50; B. nana Wittr. var. subbasispora Wittr. 1874,
p. 50; Hirn 1900, p. 349, Pl. LVI, fig. 362; Collins 1909, p. 272; Heering 1914, p. 229,
fig. 349: West 1916, p. 396, fig. 251c; Tiffany 1928, p. 132, Pl. XXII, fig. 75.
Monoecious; oogonia ellipsoid, patent, below terminal setae or
vegetative cells; outer wall of oospore longitudinally ribbed; antheridia
1-2f, erect (rarely patent) subepigynous or scattered; vegetative cells
10-16 X10-22u; oogonia 20-25X33-40u; oospores 18-23X30-38y;
antheridia 7-9 5-9u.
Greenland, Alaska, Ceylon, India, Austria, England, Fin-
land, Germany, Latvia, Sweden, Norway, Turkestan.
2. B. monile Wittrock and Lundell.
(Pl. IX, fig. 72.)
In Wittrock 1874, p. 50; (?) B. nana Wittr. in Wolle 1887, p. 100; Hirn 1900,
p. 348, Pl. LVII, fig. 360; Collins 1909, p. 272; Heering 1914, p. 229, fig. 348; Tiffany
1928, ps 132, Pl: XOGU, fie.72;.P. B.A. No. 1432.
Monoecicus; usually few celled; vegetative cells short and some-
times globose; oogonia ellipsoid, patent (rarely erect), below terminal
setae or vegetative cells; outer wall of oospore longitudinally ribbed;
antheridia 1-2, erect or patent, subepigynous or scattered; vegetative
cells 11-16 10-16u; oogonia 22-25 X 30-38; oospores 20-23 XK 28-35;
antheridia 8-10 6-8u.
United States: Massachusetts, New Jersey; Sweden, Fin-
land, Latvia; British Columbia.
2a. Var. robusta Hirn.
(Pl. IX, fig. 73.)
1900, p. 349, Pl. LVII, fig. 361; Heering 1914, p. 229; Tiffany 1928, p. 133,
Pl. XXII, fig. 73.
*Species of incomplete descriptions and included in the key with such char-
acters as are available.
7See foot note, page 65.
BULB OCH AETE 31
Oogonia considerably larger and broadly ellipsoid; vegetative cells
14-19 14-194; oogonia 28-34X39-45u; oospores 26-3237-42u;
antheridia 8-10 X5-8u.
Germany.
B. nana and B. monile, as far as specific dimensions are
concerned, are quite similar plants. If one has a mature plant
of the former, however, he will find vegetative cells longer than
their width, and this is almost never the case in the latter.
The variety robusta is easily separated by its longer oogonia.
3. B. megastoma Wittrock and Lundell.
(Pl. IX, fig. 76.)
In Wittrock 1874, p. 51, Pl. 1, fig. 21; Hirn 1900, p. 354, Pl. LIX, fig. 370;
Heering 1914, p. 231, fig. 353; Tiffany 1928, p. 1383, Pl. XXII, fig. 76.
Monoecious; oogonia ellipsoid to subcylindric ellipsoid, patent
(rarely erect), below terminal setae or vegetative cells, with large
mouth-like pore; outer oospore wall longitudinally ribbed; antheridia
1-2, erect (rarely patent), scattered or subepigynous; vegetative cells
18-24 18-354; oogonia 32-36X48-54u; oospores 30-34X46-52y;
antheridial cells 10-13 & 7—9u.
Sweden, Denmark.
The large mouth-like pore of the oogonium rather readily
separates mature plants from any others of the genus.
4. B. basispora Wittrock and Lundell.
(Pl. IX, fig. 74.)
In Wittrock 1874, p. 50; Hirn 1900, p. 350, Pl. LVIII, fig. 364; Heering 1914,
p. 229, fig. 350; Tiffany 1928, p. 133, Pl. XXII, fig. 74.
Monoecious; oogonia ellipsoid or subcylindric-ellipsoid, patent or
erect, below vegetative cells; outer oospore wall longitudinally ribbed;
antheridia 1-3, patent or erect, scattered or subepigynous; vegetative
cells 15-19 15-23; oogonia 24-28 X 40—45y; oospores 22-95 X38- —43u3
antheridia 8-11 X6—8uy.
United States: Ohio; Sweden.
Among the monoecious forms B. basispora bears some
resemblance to B. debaryana and B. mirabilis, but can usually
be distinguished by its relatively shorter vegetative cells and
its oogonia.
5. B. debaryana Wittrock and Lundell.
(Pl. IX, fig. 77.)
In Wittrock 1874, 51; Hirn 1900, 353, Pl. LIX, fig. 369; Heering 1914,
Pe2ol, fig. oo2: Tiffany F998" job UBB} Lk ¥XIL figs dike
Monoecious; oogonia ellipsoid, patent, below vegetative cells or
terminal setae; outer wall of oospore longitudinally ribbed; antheridia
32 Vink (O18 DiOGOIN EMG E AE
1—?, patent or seldom erect, subepigynous or scattered; vegetative
cells 18-22 23-44u; oogonia 27-33 X43-50u; oospores 25-30 X 40-48u;
antheridia 10-12 * 8—9u.
Sweden, Latvia, Canada.
6. B. mirabilis Wittrock.
(Pl. IX, fig. 69.)
1870, p. 137, Pl. 1, figs. 8 and 9; 1874, p. 50; B. sp. Reinsch 1875, p. 81;
B. mirabilis Wittr. var. lapponica Wittr. and Lund. im Wittrock 1874, p. 51; Hirn
1900, p. 351, Pl. LVITI, fig. 365; Hirn 1906, p. 57; Collins 1909, p. 272; Heering 1914,
p. 229, fig. 351; Tiffany 1928, p. 1384, Pl. XXII, fig. 69; P. B. A. No. 1481.
Monoecious; oogonia cylindric-ellipsoid to suboblong-ellipsoid,
patent (rarely erect), below terminal setae or vegetative cells; outer
wall of oospore longitudinally ribbed; antheridia 1-4, erect or patent,
subepigynous or scattered; vegetative cells 15-2020-40u; oogonia
26-33 X 46-58; oospores 25-31 XK 44-56u; antheridia 9-12 X6—9n.
United States: New Jersey, Michigan, Illinois, Minnesota;
Greenland, Africa, Europe, Australia, Siberia, Mongolia.
6a. Form immersa (Wittrock) Hirn.
(Pl. IX, fig. 70.)
1900, p. 352, Pl. LVIII, fig. 867; B. mirabilis Wittr. var. immersa Wittr. 1874)
p. 51; Heering 1914, p. 230; Tiffany 1928, p. 134, Pl. XXII, fig. 70.
Vegetative cells 13-17X16-30u; oogonia 25-33 X40—-48u; oospores
23-30 X 38-46u; antheridia 7-11 6-8.
Norway, Germany.
6b. Var. gracilis (Pringsheim) Hirn.
(Pl. IX, fig. 71.)
1900, p. 353, Pl. LIX, fig. 368; B. gracilis Pringsh. 1858, p. 74; Wittrock 1874,
p. 57; Heering 1914, p. 230; Tiffany 1928, p. 134, Pl. XXII, fig. 71.
Vegetative cells 13-16 17-32u; oogonia 20-28 X47—-55yu; oospores
18-26 X 45-53u; antheridia 8-11 6-8uy.
Germany, Sweden, Denmark.
7. B. elatior Pringsheim.
(Pl. I, fig. 1.)
1858, p. 73, Pl. 6, fig. 5; Wittrock 1874, p. 49; Hirn 1900, p. 321, Pl. LI, fig. 327;
Hirn 1906, p. 56; Heering 1914, p. 231, fig. 355; Tiffany 1928, p. 134, Pl. XIV, fig. 1.
Dioecious, nannandrous, gynandrosporous; oogonia depressed
globose to depressed subquadrangular-globose, erect or seldom patent,
below androsporangia; division of suffultory cell basal; oospore smooth;
androsporangia epigynous or rarely scattered, 1-2; dwarf males usually
on suffultory cells, antheridia exterior, unicellular, stipe scarcely longer
than the antheridia; vegetative cells 13-18 20-63; oogonia 34-44
X31-38u; oospores 32-4229-36u; androsporangia 10-13X8-11y;
dwarf male stipe 8-10 X 18-35y; antheridia 6-8 X 9-1 1p.
United States: Massachusetts; India, Ceylon, Austria, Aus-
tralia, Germany, Sweden, New Caledonia.
BwEp OCH AE T Eb 33
7a. Form pumila Hirn.
(Pl. I, fig. 2.)
1900, p. 322, Pl. LI, fig. 328; Tiffany 1928, p. 135, Pl. XIV, fig. 2.
Smaller; vegetative cells 10-15X25-60u; oogonia 31-37 X28-37u;
androsporangia 10-11X9-llu; dwarf male stipe 8-1019-24n;
antheridia 7-9 X6-8u.
Brazil.
7b. Var. scrobiculata Tiffany.
(Pl. I, fig. 3.)
1928, p. 135, Pl. XIV, fig. 3.
Similar to the type except outer oospore wall is minutely scrobiculate; °
antheridia 1—2; vegetative cells 13-16 X 28—40y; oogonia 28-44 & 28-36;
oospores 26-42 X26-34u; androsporangia 10-13X10-16u; antheridia
6-8 X 4-7; dwarf male stipe 11-13 X 16—20u.
United States: Alabama.
This variety clearly belongs with B. elatior because of its
exterior antheridia, although the oospore markings are similar
to those of B. brebissonit. It is barely possible, of course, that
B. elatior sometimes has scrobiculate oospores, although there
is no evidence for it. Until such time as more is known about
the variations, if any, in the oospore of the species, it seems
best to catalogue the separate variety, as above.
S. B. minuta West and West.
(Pl. I, fig. 9.)
1902, p. 126, Pl. 17, fig. 10; Hirn 1906, p. 25, Pl. IV, fig. 28; West 1916, p. 388,
fig. 242: Tiffany 1928, p. 135, Pl. XIV, fig. 9.
Dioecious, nannandrous, gynandrosporous: oogonia depressed-
globose, patent or erect, below the androsporangia; division of oogonium
median or nearly so; suffultory cells without division, or with division
basal; oospore wall smooth; androsporangia unicellular, epigynous;
dwarf males on suffultory cells, antheridia exterior, unicellular, stipe
twice as long as antheridia, curved; vegetative cells 9-1218-35u;
oogonia 29-35 X 24-27; oospores 27-33 X 22—25yu; androsporangia 9-11
x6-9n; dwarf males 6-7 X 18-20p.
Heneratgodha, Ceylon.
B. minuta is among the smallest of the genus, the length of
its oogonium being less than that of any other known species.
9. B. brebissonii Kuetzing.
(Pl. I, fig. 7.)
1854, p. 19, Pl. 86, figs. B and f; B. tumida Wittr. 1870, p. 139; 1874, p. 46; Hirn
1900, p. 323, Pl. LI, fig. 330; Collins 1909, p. 268; Heering 1914, p. 231, fig. 356;
Tiffany 1928, p. 135, Pl. XIV, fig. 7.
Dioecious, nannandrous gynandrosporous; oogonia depressed-sub-
quadrangular-globose, erect, below terminal setae or androsporangia;
34 TE © EDO GO Niwa AGE
division of the suffultory cell basal; outer oospore wall scrobiculate;
androsporangia scattered or epigynous, 1-3; dwarf males on oogonia
(rarely on adjacent cells), antheridia interior, stipe slightly curved,
shorter than antheridia; vegetative cells 17—2050-90yu; oogonia
49-50 X37-45u; oospores 40-48X35-43u; androsporangia 11-15
12-18u; dwarf males 10-12 X 28-33.
United States: Massachusetts, Illinois, Alaska; Europe.
This species is rather readily distinguished by its usually
basal division of the suffultory cells, its interior antheridium,
and its erect oogonia. It is distinguished from the variety
minor by its larger size.
9a. Var. minor Woronichin.
1923, p. 99; (2) B. brebissoni Kuetz. f. in Borge 19238, p. 30; Tiffany 1928, p. 136.
Smaller than the type; vegetative cells 13-17 X20-100u; oogonia
35-38 X 31-388; oospores 33-36 X 29-364; dwarf males 8-9 X 26-27.
minis Caveasus.
10. B. furberae Collins.
(Pl. I, fig. 8.)
1918a, p. 142, Pl. 124, figs. 1-5; Tiffany 1928, p. 136, Pl. XIV, fig. 8.
Dioecious, nannandrous, gynandrosporous; oogonia depressed globose,
below terminal setae, patent (rarely erect); division of suffultory cell
inframedian; outer wall of oospore scrobiculate; androsporangia
scattered, 1-9; dwarf males on oogonia, stipe strongly curved; antheridia
interior; vegetative cells 10-15X30-75u; oogonia 36-43X27-34p;
oospores 34-41X25-32u; androsporangia 9-108-9u; dwarf males.
1-8 X20—25p.
United States: Massachusetts (Woods Hole).
This species differs from B. elatior in its scrobiculate spore
wall and its division of suffultory cell. It is smaller than
B. brebissonit.
11. B. crenulata Pringsheim.
(Pl. I, fig. 4.)
1858, p. 72, Pl. 6, fig. 4; B. crenulata Pringsh. var. plena Wittr. 1872, p. 19;
Wittrock 1874, p. 45; Hirn 1900, p. 331, Pl. LIII, fig. 337; Collins 1909, p. 269;
Heering 1914, p. 238, fig. 359; Tiffany 1928, p. 136, Pl. XIV, fig. 4.
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed-
globose, patent, below terminal setae or androsporangia, or rarely
vegetative cells; division of suffultory cells median or slightly below;
spore wall scrobiculate to crenulate; androsporangia epigynous or
scattered, 1-5; dwarf males on or near oogonia, antheridia interior,
stipe slightly curved, shorter than antheridium; vegetative cells 16-20 X
32-70u; oogonia 43-48 35-43u; oospores 40-46 X33-40u; antheridia
10-15X7-10u; dwarf males 9-10 X 24—26un.
Bower oce LE TE 3D
United States: Michigan, Illinois; Australia, Finland, Ger-
many, Norway, Sweden, Denmark, Patagonia.
B. crenulata has often been confused with forms of B.
intermedia, since the ‘‘crenulations’’ of the oospore walls are
not always distinctly “‘crenulate.’’ It seems best, however, to
retain the two as distinct species because (1) the latter normally
has longer cells in proportion to diameter and (2) the two
species normally represent extremes of a series of gradations
in oospore wall ornamentation: B. intermedia may have nearly
smooth to scrobiculate oospores, while those of B. crenulata
vary from distinctly scrobiculate to crenulate.
12. B. intermedia De Bary.
(Pl. I, fig. 5.)
1854, p. 72, Pl. 4, figs. 1-7; Wittrock 1874, p. 44; B. crenulata Pringsh. var.
supremediana Wittr. 1883 in Wittr. and Nordst. Alg. Exs. Fasc. 11, No. 509; (?)
B. elachistandria Wittr. in Borge 1896, p. 3; Hirn 1900, p. 326, Pl. LII, fig. 333;
B. intermedia De Bary f. americana Hirn 1900, p. 328, Pl. LII, fig. 334; B. intermedia
De Bary f. supramediana (Wittr.) Hirn 1900, p. 328, Pl. LII, fig. 335; Hirn 1906,
p. 56; Collins 1909, p. 268, fig. 82; Heering 1914, p. 233, fig. 358; Tiffany 1926, p. 109,
Berio O 7m O2Se pels ible oeiyn tesa PB. Av Non 973:
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed-
globose, patent, below androsporangia; division of suffultory cells
nearly median; outer wall of oospore scrobiculate, rarely apparently
smooth; androsporangia 1-2, epigyncous or rarely scattered; dwarf
males on the oogonium; antheridium interior, stipe slightly curved,
shorter than the antheridium; vegetative cells 17-20 35-70u; oogonia
40-48 X 31—40y; oospores 38-46 X 30-38; androsporangial cells 11-13 X
7-12u; dwarf males 9-10 X 21—26u.
United States: Iowa, Illinois, Ohio, Michigan, Connecticut,
Pennsylvania, Massachusetts, Alaska; Canada, Australia,
Europe, Greenland, Africa.
12a. Var. depressa Wittrock.
(Pl. I, fig. 6.)
1874, p. 44, Pl. 1, fig. 18; Hirn 1900, p. 329, Pl. LII, fig. 336; B. intermedia
De Bary var. depressa Hirn in Heering 1914, p. 233; Tiffany 1926, p. 109; 1928,
p. 137, Pl. XIV, fig. 6.
Vegetative cells a little longer than in the type; oogonia depressed-
globose; outer oospore wall scrobiculate, often nearly smooth; division
of suffultory cell a little above the median position (rarely a little below
median); vegetative cells 14-19X35-88yu; oogonia 42-4630—40p;
oospores 40-44 28-38u; androsporangial cells 11-13X9-12u; dwarf
males 9-11 22-25
United Stas: Iowa; Finland, Germany, Norway, Sweden;
British Columbia.
Hirn recognized with B. intermedia its variety depressa and
two forms, americana Hirn and supramediana (Wittrock)
36 LHE: OED OGON 1A CEASE
Hirn. I have seen a great number of intermedia plants from
the North Central states, and judging from this American
material and from original descriptions, it seems almost impos-
sible to recognize with certainty either of the two forms above;
the variety is probably distinct. Occasionally individual plants
and more often parts of filaments are found with slight differ-
ences and variations in form and shape of vegetative cells and
oogonia. Frequently all variations between the type and the
two forms can be noted in one plant. The variety depressa
with relatively longer cells in proportion to diameter is perhaps
sufficiently distinct to recognize. It does not appear to be to
the best interests of taxonomic nomenclature in this species to
do little more than recognize its variability. I have, therefore,
included with the species proper the two forms americana and
supramediana. The relationship to B. crenulata is noted above,
under that species.
13. B. subintermedia Elfving.
(Pl. Il, fig. 15.)
In Hirn 1895, p. 8; Hirn 1900, p. 332, Pl. LIII, fig. 338; Heering 1914, p. 233,
fig. 360; West 1916, p. 396, fig. 251A; Tiffany 1928, p. 188, Pl. XV, fig. 15.
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed-
globose, patent, below terminal setae, androsporangia, or rarely vege-
tative cells; division of suffultory cell submedian; outer spore wall
scrobiculate; androsporangia 1—’, epigynous or scattered; dwarf males
on oogonia, stipe curved or nearly erect, shorter than the oogonia;
vegetative cells 17-2234-100u; oogonia 44-51 X39-44y; oospores
42-48 X37-41u; androsporangia 13-16X9-10u; dwarf males 10-12
25-30u.
Finland, Great Britain.
14. B. angulosa Wittrock and Lundell.
(PEST ig. 143)
In Wittrock 1874, p. 45; (?) B. elachistandria Wittr. in Wolle 1887, p. 97; Hirn
1900, p. 336, Pl. LIV, fig. 346; Heering 1914, p. 235, fig. 364; Tiffany 1928, p. 138,
Pl. XV, fig. 14.
Dioecious, nannandrous, gynandrosporous; oogonia biconically and
angularly globose, apically truncate, below terminal setae or rarely
androsporangia; division of suffultory cells a little above median position;
oospore wall smooth; androsporangia scattered or epigynous, 1-3;
dwarf males on oogonia, antheridia interior, stipe somewhat curved;
vegetative cells 13-18X20-45yu; oogonia 36-42X33-39u; oospores
34-40 X 30-364; androsporangia 10-11X9-10u; dwarf males 8-9X
18-21.
United States: Pennsylvania; England, Sweden, Finland,
Africa.
BULB OCH AETE 37
14a. Form picta Hirn.
1900, p. 337.
Of smaller dimensions; vegetative cells 13-16X19-40u; oogonia
33-38 X 31-37.
Brazil.
15. B. borealis Wittrock.
(Pl. Il, fig. 10.)
1870, p. 138; 1874, p. 46; Hirn 1900, p. 324, Pl. LI, fig. 331; Heering 1914, p. 233,
fig. 357; Tiffany 1928, p. 1389, Pl. XV, fig. 10.
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed-
globose, patent, below vegetative cells, wall thick; division of suffultory
cell superior (occasionally nearly supreme); outer oospore wall scrobicu-
late or sometimes nearly smooth; androsporangia 1-3, subepigynous,
patent: dwarf males on oogonia, antheridia interior, stipe a little curved,
shorter than antheridia; vegetative cells 16—-21X20-42u; oogonia
40-48 X 35—40u; oospores 38-46 X 33-38; androsporangia 12-13 *8—-9y;
dwarf males 9-10 X18—21y.
Norway, Sweden, Finland.
16. B. nordstedtii Wittrock.
(Pl. II, fig. 17.)
1874, p. 44; Hirn 1900, p. 332, Pl. LIII, fig. 339; Collins 1909, p. 269; Heering
1914, p. 234, fig. 361; West 1916, p. 396, fig. 251B; Tiffany 1928, p. 139, Pl. XV,
homldae) barALe NOt
Dioecious, nannandrous, gynandrosporous; oogonia depressed-
globose or subquadrangularly so, patent, below androsporangia or
rarely terminal setae; division of suffultory cell superior (occasionally
submedian); oospore wall finely scrobiculate or nearly smooth; andro-
sporangia unicellular, epigynous; dwarf males on oogonia, stipe slightly
curved, shorter than antheridia; vegetative cells 14-18X28-85uy;
oogonia 36-43X29-36u; oospores 34-4127-34u; androsporangia
10-12 X9-12u; dwarf males 9-19 X 23-25un.
United States: Ohio, Illinois, Connecticut, Alaska; Green-
land, Australia, Finland, Germany, Spain, Sweden, Austria,
Ireland.
16a. Form suberecta Collins.
(PI. If, fig. 18.)
1912, p. 88; Tiffany 1928, p. 189, Pl. XV, fig. 18.
Smaller; oogonia 28-32 34-38u, depressed-globose, often erect.
United States: Massachusetts.
The suberect habit of this form appears to be very incon-
stant, but the smaller dimensions warrant a separate form.
16b. Var. minor Woronichin.
1923, p. 99.
Vegetative cells 10-1220-25u; oospores about 36X33yu; dwarf
males 8-10 19-20.
Tiflis (Caucasus).
38 EE JODO: GO mNtyACGsn ACE
17. B. polyandria Cleve.
(Pl. Il, figs. 11 and 12.)
In Wittrock 1870, p. 140; B. polyandra Cleve in Wittrock 1874, p. 46; Hirn 1900,
p. 3384, Pl. LIV, fig. 342; Collins 1909, p. 270; Heering 1914, p. 234, fig. 362; Tiffany
1928, p. 140, Pl. XV, figs. 11 and 12; P. B. A. No. 1682.
Dioecious, nannandrous, idioandrosporous; oogonia subdepressed-
globose, patent, below terminal setae or vegetative ceils; division of
suffultory cell superior (rarely submedian); outer oospore wall
scrobiculate or nearly smooth; androsporangia to 10-seriate; dwarf
males on oogonia, antheridia interior, stipe slightly curved, shorter than
antheridia; vegetative cells 15-20*45-100u; oogonia 39-46 32—42u;
oospores 37-44 30-40"; androsporangia 12-14X11—l5u: dwarf males
8-9 X 23-26u.
United States: Massachusetts, Florida; Brazil, Europe.
17a. Form notabilis Hirn. —
(Pl. II, fig. 13.)
1900, p. 334, Pl. LIV, fig. 348; Tiffany 1928, p. 140, Pl. XV, fig. 13.
Division of suffultory cell often supreme; vegetative cells 17-22
X51-88u; oogonia 41-46X36-48u; oospores 39-44 34-41y; andro-
sporangia 12—-14X12-15u; dwarf males 8-10 X23-25n.
Great Britain.
18. B. gigantea Pringsheim.
(Pl. V, figs. 35 and 36.)
1858, p. 71, Pl. 6, fig. 1; Wittrock 1874, p. 48; Hirn 1900, p. 347, Pl. LVII, fig.
359; Collins 1909, p. 271; Heering 1914, p. 239, fig. 373; Tiffany 1926, p. 109, Pl. X,
figs. 108-110; Tiffany 1928, p. 140, Pl. XVIII, figs. 35 and 36.
Dioecious, nannandrous, idioandrosporous; oogonia subdepressed
globese or rarely depressed oboviform-globose, patent, below terminal.
setae, rarely below vegetative cells; division of suffultory cell slightly
below median; outer wall of oospore reticulate-scrobiculate; andro-
sporangia 1-5; dwarf males slightly longer than the oogonia on which
they develop; antheridia interior; stipe about twice as long as antheridium,
curved; vegetative cells 24-3250-112u; oogonia 60-70X50-58y;
oospores 58-68 X48-56u; androsporangial cells 18-2010-14y; dwarf
male stipe 10-13 28—45u; antheridial cell 13-14 20-380u.
United States: Michigan, Florida, Iowa, Pennsylvania;
Australia, Europe.
19. B.diamesandria Nordstedt and Hirn.
(Pl. II, fig. 16.)
In Hirn 1900, p. 323, Pl. LI, fig. 329; Tiffany 1928, p. 140, Pl. XV, fig. 16.
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed-
globose, erect, below terminal setae or vegetative cells; division of
suffultory cell basal; oospore wall smooth; androsporangia scattered or
subepigynous, 1—?; dwarf males on suffultory cells (rarely on oogonia),
antheridia unicellular; vegetative cells 17-23 * 42-80; oogonia 48-54 X
45-52u; oospores 45-53 X 43-50u; androsporangia 14-17 X 10-15; dwarf
male stipe 11-13 15-21y; antheridia 10-12 X 14—18y.
Beeb OGmiAk TE 39
Bengal, Asia.
20. B. elachistandria Wittrock.
(Pl. III, fig. 21.)
1874, p. 43; B. intermedia Pringsh. 1858, p. 72, Pl. IV, figs. 15-23; Hirn 1900,
p. 342, Pl. LVI, fig. 354; Heering 1914, p. 231, fig. 354; Tiffany 1928, p. 141, PI.
SeVAL, Hele
Dioecious, nannandrous, gynandrosporous; oogonia globose, patent,
below androsporangia; division of suffultory cell nearly median; oes Buse
wall smooth (7); androsporangia epigynous or scattered, 1-2; dwarf
males on oogonia, small and unicellular; vegetative cells 20-24 aie
oogonia about 4644y; androsporangia 14-16X10-1lyu; dwarf males
9X 19u.
Germany.
21. B. obliqua Lundell.
(Pl. II, fig. 26.)
In Hirn 1900, p. 344, Pl. LVI, fig. 356; Heering 1914, p. 238, fig. 371; Tiffany
1928, p. 141, Pl. XVI, fig. 26.
Dioecious, nannandrous, gynandrosporous and idioandrosporous;
oogonia depressed-globose, patent, below terminal setae or (rarely)
androsporangia; division of suffultory cell median or nearly so; oospore
wall smooth; androsporangia 1—?, epigynous; dwarf males on oogonia,
antheridia interior; vegetative cells 21-27 X42-108u; oogonia 55-64
43—51u; oospores 53-62 40-49; androsporangia 16-21 7-10u; dwarf
male stipes 9-10 X 25—36y; antheridia 10-12 15-21p.
United States: Michigan; Austria, Sweden.
22. B. sessilis Wittrock.
(Pl. III, fig. 19.)
1872, p. 18, Pl. 1, fig. 2; 1874, p. 47; Hirn 1900, p. 338, Pl. LV, fig. 349; Heering
1914, p. 236, fig. 366; Tiffany 1928, p. 141, Pl. XVI, fig. 19.
Dioecious, nannandrous, gynandrosporous; oogonia subquad-
rangularly globose, patent, below terminal setae or occasionally below
vegetative cells; division of suffultory cell superior; outer oospore wall
scrobiculate; androsporangia scattered, 1-3; dwarf males on oogonia
or rarely suffultory cells, antheridia interior, pe a little curved,
shorter than antheridia; vegetative cells 19-2238-72u; oogonia
51-56 X 44— 50; oospores 48- 04 X 42— —48u; eo. toe <0 pn:
dwarf males 9-11 XK 26-29u.
France, Sweden, Canada.
22a. Form glabra Hirn.
(Pl. III, fig. 20.)
1900, p. 339, Pl. LV, fig. 350; Heering 1914, p. 236; Tiffany 1928, p. 141, Pl.
XVI, fig. 20.
Smaller, with oospore wall smooth; vegetative cells 16-21 X32-75y;
oogonia 44—51 & 40—45y: oospores 42-48 & 38-43; androsporangia 10-12
X 10-124; dwarf males 9-11 K 23-27.
Sweden.
40 HE. OE DOGONTACHE Ace
23. B. setigera (Roth) C. A. Agardh.
(Pl. V, fig. 37.)
1817, p. 71; Conferva setigera Roth 1806, p. 283; B. setigera C. A. Agardh 1817,
p. 71; Wittrock 1874, p. 47; (?) B. setigera var. Canbyit Wood in Wolle 1887, p. 99;
(2?) B. Canbyit, Wood 1872, p. 202; Hirn 1900, p. 339, Pl. LV, fig. 351; Collins 1909,
p. 271; Heering 1914, p. 236, fig. 367; Tiffany 1928, p. 142, Pl. XVIII, fig. 37.
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed or
depressed (quadrangularly) globose, patent, generally below terminal
setae, more rarely below androsporangia or vegetative cells; division of
suffultory cell slightly above median or rarely superior; outer oospore
wall scrobiculate; androsporangia scattered or more rarely epigynous,
1-3; dwarf males on oogonia or near it; antheridia interior, stipe curved,
shorter than antheridium; vegetative cells 25-2862-140yu; oogonia
70-80 X 56-654; oospores 67-77 X53-62y; androsporangia 16-20
10-184; dwarf males 11-14 *30-36u.
United States: Connecticut, New Jersey, Florida, Alabama,
South Carolina, Michigan; Europe, South America; Africa.
24. B. alabamensis Transeau and Brown.
(Pl. V, fig. 38.)
In Tiffany 1928, p. 142, Pl. XVIII, fig. 38.
Dioecious, nannandrous, gynandrosporous; oogonia globose,
depressed globose, or rarely angularly globose, patent; division of
suffultory cells superior; outer spore wall scrobiculate; androsporangia
hypogynous or epigynous or rarely scattered; dwarf males, a little
shorter than oogonia, on vegetative cells, antheridia interior, stipe a
little curved; vegetative cells 22-40 X 62-111; oogonia 77—92 X 70-88y;
oospores 75-90 X68-86yu; dwarf male stipes 14-18 *35-38y; antheridia
14-15 X 15-16.
United States: Alabama.
In form and general appearance this species is near B.
setigera. It is larger, however, in all dimensions and is thus the
largest globose species of the genus.
25. B. dispar Wittrock.
(Pl. II, fig. 23.)
In Wittrock and Nordstedt Exs. 1882; Hirn 1900, p. 335, Pl. LIV, fig. 344;
rotus 1909, p. 270; Heering 1914, p. 234, fig. 363; Tiffany 1928, p. 142, Pl. XVI,
(2 Re
Dioecious, nannandrous, gynandrosporous and idioandrosporous;
oogonia subdepressed globose, patent, below terminal setae or rarely
vegetative cells; division of suffultory cell superior (rarely submedian) ;
outer spore wall thick, finely scrobiculate; androsporangia scattered,
1—2; dwarf males on oogonia, antheridia interior, stipe a little curved,
shorter than antheridia; vegetative cells 16—21X32-95u; oogonia
44-56 X42-51lu; oospores 40-54X38-48u; androsporangia 12-16X
10-12u; dwarf males 9-11 *23-26un.
Sweden, Greenland.
BULBOCHA TE 41
25a. Var. ripartiana Wittrock.
(Pl. II, figs. 24 and 25.)
In Hirn 1900, p. 3385, Pl. LIV, fig. 345; Tiffany 1928, p. 148, Pl. XVI, figs.
24 and 25.
Idioandrosporous; division of suffultory cell supreme; dwarf males on
or near oogonia; vegetative cells 15-21 X45-105y; oogonia 48-54 x 41-
50u; oospores 46-53 X389-48u; androsporangia 12-16X11-14u; dwarf
males 10-12 23—25un.
France.
26. B. punctulata (Nordstedt) Hirn.
(Pl. IV, fig. 31.)
1900, p. 326, Pl. LI, fig. 332; B. setigera (Roth) C. A. Agardh var. punctulata
Nordstedt 1888, p. 9; Tiffany 1928, p. 143, Pl. XVII, fig. 31.
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed
globose, patent, below terminal setae or androsporangia, wall thickened,
division median, narrow but distinct; division of suffultory cell superior;
outer oospore wall scrobiculate; androsporangia epigynous, 1—?; dwarf
males on oogonia, antheridia interior, stipe a little curved, shorter than
the antheridium; vegetative cells 22—2666-104u; oogonia 64-68 x
57-604; oospores 60-66%X53-58u4; androsporangia 18X11lu; dwarf
males 11-12 30-34u.
New Zealand.
27. B. crassiuscula Nordstedt.
(Pl. IV, figs. 28 and 29.)
1877, p. 30, Pl. 3, figs. 14 and 15; B. setigera (Roth) C. A. Agardh in Moebius
1894, p. 315; (?) B. ellipsospora West 1899, p. 54; Hirn 1900, p. 341, Pl. LV, fig. 352;
Collins 1909, p. 271; Heering 1914, p. 236, fig. 368; Tiffany 1928, p. 148, Pl. XVII,
figs. 28 and 29.
Dioecious, nannandrous, idioandrosporous; oogonia depressed (sub-
quadrangularly) globose, patent, below terminal setae or occasionally
vegetative cells; division of suffultory cells superior (rarely submedian) ;
outer oospore wall scrobiculate; androsporangia 1-4; dwarf males on
oogonium or near it; antheridia interior, stipe slightly curved, shorter
than antheridium; vegetative cells 22—2755-148u; oogonia 60-78
<50-62u; oospores 58-76 X48-60u; antheridia 16-19X10-13y; dwarf
males 12-14*30-34u.
United States: Illinois, Massachusetts, Michigan; Canada,
Greenland, Europe, Australia, Ceylon.
28. B. crassa Pringsheim.
(Pl. IV, fig. 32.)
1855, Pl. 1, fig. 29; Wittrock 1874, p. 48; Hirn 1900, p. 343, Pl. LVI, fig. 355;
Heering 1914, p. 238, fig. 370; Tiffany 1928, p. 148, Pl. XVII, fig. 32.
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed
globose to globose, patent, below terminal setae or rarely vegetative
cells; division of suffultory cell median or a little above; outer oospore
wall scrobiculate; androsporangia scattered, up to 4-seriate; dwarf
males a little longer than oogonia, antheridia exterior, unicellular,
stipe about twice as long as antheridium; vegetative cells 22-26 K 44-60u;
42 ree, Or DiC GO NAC EAlun
oogonia 52-60 X 42-51; oospores 50-58 X 40-48u; androsporangia 13-15
X 14-16; dwarf male stipes 9-11 32—44u; antheridia 8-9 X 21—24u.
United States: Ohio; Germany, Austria, Switzerland.
The outer oospore wall of this species is recorded by Hirn
as doubtfully smooth. Material collected in Ohio in 1920
showed the wall to be scrobiculate, and the description is
emended accordingly.
29. B. valida Wittrock.
(Pl. IV, fig. 27.)
1872, p. 17, Pl. 1, fig. 1; 1874, p. 48; Hirn 1900, p. 346, Pl. LVI, fig. 357; Heering
1914, p. 238, fig. 372; Tiffany 1928, p. 144, Pl. XVII, fig. 27.
Dioecious, nannandrous, gynandrosporous; oogonia depressed
globose, patent, below terminal setae; division of suffultory cell about
median; outer oospore wall scrobiculate; androsporangia scattered,
1-3; dwarf males on oogonia, antheridia interior, stipe a little longer
than antheridium, curved; vegetative cells 23-2746-95u; oogonia
59-70 X48-56u; oospores 57-68X46-54u; androsporangia 18-20
10-144; dwarf male stipes 9-1023-29 (40) uw; antheridia 11-12
20—22 tu.
United States: Michigan; Finland, Sweden.
30. B. quadrata Wittrock.
(Pl. II, fig. 22.)
1872, p. 19, Pl. 1, fig. 3; 1874, p. 45; Hirn 1900, p. 338, Pl. LV, fig. 348; Heering
1914, p. 236, fig. 365; Tiffany 1928, p. 144, Pl. XVI, fig. 22.
Dioecious, nannandrous, gynandrosporous; oogonia subdepressed
(subquadrangularly) globose, patent, below androsporangia; division of
suffultory cell inframedian (rarely nearly median); outer oospore wall
scrobiculate; androsporangia 1—2, epigynous, rarely scattered; dwarf
males on oogonia, antheridia interior, stipe a little curved, shorter than
antheridium; vegetative cells 19-25 30-50u; oogonia 40-50 40—45y;
oospores 38-48 X38—48u; androsporangia 15-17 X11—12u; dwarf males
LO=I2> 27 S20.
United States: Ohio; Finland, Sweden.
31. B. congener Hirn.
(Pl. V, figs. 33 and 34.)
1900, p. 346, Pl. LVII, fig. 358; Tiffany 1926, p. 108, Pl. X, figs. 111 and 112;
Tiffany 1928, p. 144, Pl. XVIII, figs. 33 and 34.
Dioecious, nannandrous, idioandrosporous; oogonia depressed-
globose or more rarely oboviform-globose, patent, below terminal setae;
division of suffultory cell inframedian; outer oospore wall scrobiculate;
androsporangia 1-4; dwarf males a little shorter than the oovonia on
which they develop; antheridia interior, stipe about twice as long as the
antheridial cell, curved; vegetative cells 21-2440-75y; oogonia
44-54 X 40-48; oospores 42-52 * 38-46; androsporangial cells 13-15 X
10-131; dwarf males 9-10 K 29-34; antheridial cells 10-11 X 14-17u.
United States: Iowa; South America.
MUL BOC HA ET E 43
32. B. pyrulum Lundell.
(Pl. IV, fig. 30.)
In Hirn 1900, p. 342, Pl. LV and LVI, fig. 3538; Heering 1914, p. 288, fig. 369;
Tiffany 1928, p. 145, Pl. XVII, fig. 30.
Dioecious, nannandrous, (?) idioandrosporous; oogonium pyriform,
patent, below terminai setae, wall thickened; division of suffultory
cells submedian; outer oospore wall finely scrobiculate; dwarf males
near or on oogonia, antheridia interior, stipe a little curved, shorter
than antheridium: vegetative cells 23-29X64-178u; oogonia (58-)
68-85 X 64-79"; oospores 65-83 61-774; dwarf males 11-14 29-33u.
Austria, Sweden, Finland.
33. B. doliiformis Borge.
(Pl. VI, figs. 39 and 40.)
1925, p. 11, Pl. 1, fig. 41; Tiffany 1928, p. 145, Pl. XIX, figs. 39 and 40.
Dioecious, nannandrous; oogonia ellipsoid, erect, below terminal
setae; suffultory cell without division; oospores ellipsoid, not quite
filling oogonia, wall smooth; dwarf males on vegetative cells, antheridia
exterior, 2; vegetative cells 11-15X11-16u; oogonia 23-25 X 26-33;
oospores 22—23 X27-28u; dwarf male stipe 10-12X10-12y; antheridia
7-8 X 7-8.
Argentina:
This species is near B. pygmaea in size and shape of cells
and in having suffultory cells without division. The plant is
few celled with the vegetative cells convex, as seen laterally,
sometimes with a broad median constriction, and the oospore
wall is smooth.
34. B. pygmaea Pringsheim; Wittrock.
(Pl. VI, fig. 41.)
In Wittrock 1870, p. 141; B. pygmaea b. minor Pringsh. 1858, p. 74; B. pygmaea
Wittr. 1870, p. 141; Wittrock 1874, p. 52; Hirn 1900, p. 356, Pl. LIX, fig. 372; Collins
1909, p. 273; Heering 1914, p. 239, fig. 374; Tiffany 1928, p. 145, Pl. XIX, fig. 41.
Dioecious, nannandrous, gynandrosporous; oogonia ellipsoid, patent,
below terminal setae or vegetative cells; outer wall of oospore longi-
tudinally ribbed; suffultory cells without division; androsporangia
subepigynous or scattered, I—? celled; dwarf males near oogonia,
antheridia exterior, 1-3; vegetative cells 11-15 X8—15y; oogonia 22-25 X
32-40u; oospores 20-23X30-38u; androsporangia 7-106-9u; dwarf
male stipes 11-12 15-19; antheridia 7-8 X 7-8u.
United States: Massachusetts; Europe, Brazil.
35. B. tenuis (Wittrock) Hirn.
(Pl. VII, fig. 59.)
1900, p. 368, Pl. LXIII, fig. 388; B. rectangularis Wittr. var. tenuis Wittr.
1874, p. 56; B. rectangularis Wittr. var. norvegica Wittr. 1874, p. 56; B. tenuis (Wittr.)
Hirn var. norvegica (Wittr.) Hirn 1900, p. 369 (not 1906, p. 60); Collins 1912, p. 89;
Heering 1914, p. 242, fig. 381; Tiffany 1928, p. 146, Pl. XX, fig. 59.
44 eH Ee OSE DIO'GO NTA GE Ase
Dioecious, nannandrous, gynandrosporous; oogonia suboblong-
ellipsoid, erect or patent, below terminal setae or androsporangia; outer
oospore wall longitudinally ribbed; androsporangia epigynous or more
rarely scattered, 1-7; dwarf males on or near oogonia; antheridia
exterior, 1-3; vegetative cells 13-16 X20-40u; oogonia 22-26 K 42-48;
oospores 20-2440-46u; androsporangia 10-12*13-19u; dwarf male
stipes 12-14 18—24u; antheridia 7-9 X 6—7u.
United States: Massachusetts; Northern Europe.
doa. Var. norvegica (Wittrock) Hirn.
(Pl. VII, fig. 60.)
1906, p. 60; Tiffany 1928, p. 146, Pl. XX, fig. 60.
Larger vegetative cells and oogonia; vegetative cells 15-18 X 22-36u;
oogonia 27-34X47-53u; oospores 25-3245-51u; dwarf male stipes
12-14 19-23u; antheridia 8-9 8p.
Finland.
The dimensions of the variety norvegica as given by Hirn
in his monograph (1900, p. 369) are so nearly the same as those
of the species proper as to make its varietal position scarcely
tenable. Material collected by Silfvenius in Finland in 1903
is labelled variety norvegica by Hirn (1906) having the dimen-
sions given above. It seems best, therefore, to consider the
variety as having the dimensions as recorded for the Finnish
material, and to regard the former description as included in the
Species proper.
36. B. repanda Wittrock.
(Pl. VI, fig. 47.)
1874, p. 55; B. rectangularis Wittr. var. Lundellii Wittr. 1874, p. 56; (?) B.
rhadinospora Wittr. in Wolle 1887, p. 103; Hirn 1900, p. 363, Pl. LXI, fig. 380; Collins
1909, p. 274; Heering 1914, p. 240, fig. 378; Tiffany 1928, p. 146, PI XIX, fig. 47.
Dioecious, nannandrous, gynandrosporous; oogonia suboblong-
ellipsoid, patent or erect, below androsporangia, terminal setae, or
vegetative cells; outer oospore wall longitudinally ribbed; andro-
sporangia epigynous or subepigynous, 1—’; dwarf males near or on
oogonia; antheridia exterior, 1-3; vegetative cells, frequently repand,
12-17 X 24-604; oogonia 26-36X43-58u4; oospores 21-33X40-50y;
androsporangia 13-15<16—21u; dwarf male stipes 11—15x21-27,;
antheridia 7-10 X5—7u.
United States: Massachusetts, Maine, New Jersey, Florida;
Greenland, Finland, Norway, Sweden, Germany.
The peculiar repand appearance of the vegetative cells
usually makes the identification of this species easy. | Occasion-
ally a single plant may lack this vegetative character and may
thus be confused with B. rectangularis or B. varians.
BULBOCH AE TE 45
37. B. rectangularis Wittrock.
(Pl. VI, fig. 43.)
1870, p.-142; 1874, p. 55; (?) B. ignota Wood 1872, p. 201; Hirn 1900, p. 359,
Pl. LX, fig. 376; Collins 1909, p. 273; Heering 1914, p. 239, fig. 376; Tiffany 1928,
Dela (aeP le exe he 45 PB. AL No:-5o16:
Dioecious, nannandrous, gynandrosporous; oogonia ellipsoid, patent
or more rarely erect, below terminal setae or androsporangia or more
rarely vegetative cells; outer oospore wall! longitudinally ribbed; andro-
sporangia scattered or epigynous, 1—?; dwarf males near or occasionally
on oogonia; antheridia exterior, 1-4; vegetative cells, subrectangular in
cross section, 16-23 X 20-46u; oogonia 32-39 X 45-63; oospores 29-37 X
43-61u; androsporangia 13-16X10-27u4; dwarf male stipes 14-18
22-27; antheridia 8-10 X5-7u.
United States: Pennsylvania, Ohio, Illinois, Michigan,
Massachusetts, Rhode Island, Connecticut; Europe, Patagonia,
Mongolia.
This species is usually characterized by its long and few
branches and its nearly rectangular cells in cross section.
37a. Var. hiloensis Nordstedt.
(Pl. VI, fig. 44.)
1878, p. 22; Hirn 1900, p. 361, Pl. LX, fig. 377; Collins 1909, p. 274; Tiffany 1928,
p. 147, Pl. XIX, fig. 44.
Smaller, androsporangia generally epigynous; vegetative cells
14-19 X 2448y; oogonia 28-32 X 47-51; androsporangia 12-14 XK 13-16y;
dwarf male stipes 13-14 22—24u; antheridia 8-9 x 5-7u.
Australia; (?) Pennsylvania (U.S. A.). The only American
record is that of Wolle.
38. B. varians Wittrock.
(Pl. VI, fig. 48.)
1870, p. 143; 1874, p.53; Hirn 1900, p. 357, Pl. LIX, fig. 373; Heering 1914, p. 239,
fig. 375; Tiffany 1926, p. 109, Pl. X, fig. 113; Tiffany 1928, p. 147, Pl. XIX, fig. 48.
Dioecious, nannandrous, gynandrosporous; oogonia ovoid, patent or
erect, below terminal setae or below androsporangial cells; outer oospore
wall longitudinally ribbed, ribs serrate; androsporangia scattered,
epigynous or hypogynous, 1—2; dwarf males on or near the oogonia,
antheridia exterior, 1-3; vegetative cells 17-2222-33u; oogonia
30-36 X 44-54; oospores 28-34 X42-52u; androsporangial cells 14-17 X
14-18; dwarf male stipes 14-16 X 24—27y; antheridial cells 8-10 X 6—7u.
United States: Iowa, Ohio, Illinois, Michigan, Alabama,
Mississippi, Indiana; Canada, Europe.
38a. Var. subsimplex (Wittrock) Hirn.
(Pl. VI, fig. 49.)
1900, p. 357, Pl. LIX and LX, fig. 374; B. pygmaea a. major Pringsh. 1858,
p. 74; B. subsimplex Wittr. 1870, p. 142; 1874, p. 52; B. varians Wittr. var. alpina
Wittr. and Lund. im Wittrock 1874, p. 53; B. dumosa Wood 1872, p. 202; B. reticulata
Nordst. var. minor Lemmermann 1895, p. 25; Collins 1909, p. 273; Heering 1914,
p. 239; Tiffany 1926, p. 110; 1928, p. 147, Pl. XIX, fig. 49.
46 Me Ome GoOntLA GE Aw
Smaller in nearly all parts; ribs of oospore serrulate or smooth;
vegetative cells 13-18X16-34y; oogonia 26-30X39-46u; oospores
24-28 X37-44u; androsporangial cells 10-14X7—-l6u; dwarf male
stipes 11-14 15—24y; antheridial cells 7-8 X5-7p.
United States: Iowa, Ohio, Mississippi, Illinois, Pennsyl-
vania; Brazil, India, Europe, Australia; British Columbia.
38b. Var. hawaiensis Nordstedt.
(Pl. VI, fig. 50.)
P sae p. 21; Hirn 1900, p. 358, Pl. LX, fig. 375; Tiffany 1928, p. 148, Pl. XIX,
2g. *
Vegetative cells 13-18X17-36y4; oogonia 27-3044-54y; andro-
sporangia 12-16 13-14; dwarf male stipes 17-18 X 28-31y; antheridia
10-11 X 6-7.
United States: Ohio, Illinois; Australia.
39. B. lagoensis Wittrock.
(Pl. VI, fig. 46.)
4 me p. 53; Hirn 1900, p. 361, Pl. LXI, fig. 378; Tiffany 1928, p. 148, Pl. XIX,
2g. 4
Dioecious, nannandrous; oogonia ellipsoid, erect or rarely patent,
below vegetative cells; outer oospore wall longitudinally ribbed, the ribs
dentate and connected by transverse lines; dwarf males near oogonia;
antheridia exterior, 1-2; vegetative cells 18-2323-35y; oogonia
37-41 X 56-634; oospores 35-39X54-61u; dwarf male stipes 15-17
X 24-25; antheridia 9-10 7-8u.
Brazil.
40. B. rhadinospora Wittrock.
(Pl. VIII, fig. 66.)
1874, p. 538; Hirn 1900, p. 372, Pl. LXIII and LXIV, fig. 393; Heering 1914,
p. 242, fig. 383; Tiffany 1928, p. 148, Pl. XXI, fig. 66.
Dioecious, nannandrous, gynandrosporous; oogonia fusiformly
ellipsoid, patent or rarely erect, below androsporangia or terminal
setae or rarely vegetative cells; outer wall of oospore longitudinally
ribbed, ribs smooth; androsporangia epigynous or rarely scattered,
1—?; dwarf males on or near oogonia; antheridia exterior, 1-4; vegetative
cells 15-22 20-44; oogonia 29-37 X61—80u; oospores 27-35 X 59-78;
androsporangia 13-17X16-23u; dwarf male stipes 13-16X23-25p;
antheridia 7-9 X6-S8u.
Sweden.
40a. Forma antiqua (Nordstedt) Hirn.
(Pl. VIII, fig. 67.)
1900, p. 372, Pl. LXIV, fig. 394; Nordstedt 1883, p. 154; B. varians Wittr. var.
antiqua Nordstedt im Borge 1896, p. 4; Tiffany 1928, p. 148, Pl. X XI, fig. 67.
Ribs of oospore crenulate; vegetative cells 15-21 X20-42u; oogonia
32-37 X58-78u; oospores 30-35%X56-764; androsporangia 15-18X
23-26u; dwarf male stipes 14-17 X 23-26y; antheridia 9-11 X6-10y.
Australia.
Bailes Oe HAon tT E 47
40b. Var. litoralis Hirn.
(Pl. VIII, fig. 68.)
1900, p. 373, Pl. LXIV, fig. 395; Tiffany 1928, p. 149, Pl. X XI, fig. 68.
Larger; vegetative cells 22-28X28-56u; oogonia 38-45 75-87;
oospores 36-43 73-85y; androsporangia 17-20 18-20u; dwarf male
stipes 15-17 X 28-30; antheridia 9-13 X6—9u.
Sweden.
This variety is the only Bulbochaete known to inhabit
brackish waters.
41. B. minor Al. Braun.
(Pl. VI, fig. 54.)
In Kuetzing 1849, p. 422; Wittrock 1874, p. 54; Hirn 1900, p. 369, Pl. LXIII,
fig. 390; Collins 1909, p. 275; Heering, p. 242; Tiffany 1926, Pl. X, fig. 114; 1928,
p. 149, Pl. XX, fig. 54.
Dioecious, nannandrous, gynandrosporous; oogonia ovoid, erect or
rarely patent, below terminal setae, androsporangial cells, or more
rarely vegetative cells; outer oospore wall longitudinally ribbed; andro-
sporangia epigynous, subepigynous, or scattered, 1-7; dwarf males on or
near oogonia; antheridium exterior, 1-4; vegetative cells 18-25 X 27-50p;
oogonia 32-42 X 59-694; oospores 30— 40X 1-67; prices fee 15—16
X 16-214; dwarf male stipes 12-15 X 22-24u; antheridia 6-10 X 6—7u.
United States: Iowa, Indiana, Illinois, New Jersey; Ger-
many, Sweden, Austria, England.
41a. Var. germanica Hirn.
(Pl. VI, fig. 55.)
1900, p. 370, Pl. LXIII, fig. 391; (?) B. mimor Al. Br. in De Bary 1854, p. 72;
B. minor Al. Br. in Pringsheim 1858, p. 74; Heering 1914, p. 242, fig. 382; Tiffany
1928, p. 149, Pl. XX, fig. 55.
Vegetative cells 15-22 23-56u; oogonia 30-35 X 56-65; oospores
28-33 X 54-63; dwarf male stipes 10-1221-24uy; antheridia 6-9
X 6-7.
Germany.
This variety on the basis of dimensions and habit seems
scarcely tenable. I have not been able to examine the original
material, however, and have followed Hirn’s disposition of it.
42. B. bullardi Transeau and Tiffany.
(Pl. VII, figs. 52 and 53.)
1919, p. 241, Pl. XIV, figs. a-e; Tiffany 1928, p. 149, Pl. XX, figs. 52 and 53.
Dioecious, nannandrous, idioandrosporous; oogonia ‘ovoid-ellipsoid
or ellipsoid, erect, terminated by long setae, pore evident and supra-
median; oospores filling or nearly filling oogonia, ribs of outer wall of
oospore dentate, the teeth connected by transverse lines, longitudinal
ribs uniting irregularly; androsporangia 1-6; dwarf males slightly
curved, on oogonia or suffultory cells or vegetative cells; antheridia
exterior, 1-3; vegetative cells 20-32 X 60—-165y; oogonia 56-66 XK 70-96y;
48 tT HE O-E DOiGONIMe Eee
oospores 54-64% 67-94; androsporangia 18-21 15-334; dwarf male
stipes 18-21 X30-33y; antheridia 9-14 X 6—-10y.
United States: Massachusetts.
The combination of dimensions and oospore markings
rather readily separates this species from B. imperialis and
B. insignis, its nearest relatives.
43. B.denticulata Wittrock.
(Pl. VI, fig. 51.)
1874, p. 54; Hirn 1900, p. 362, Pl. LXI, fig. 379; Heering 1914, p. 240, fig. 377;
Tiffany 1928, p. 150, Pl. XIX, fig. 51.
Dioecious, nannandrous; oogonia broadly ellipsoid, patent, below
terminal setae or rarely vegetative cells; outer oospore wall longitudinally
ribbed, ribs often anastomosing; dwarf males on or near oogonia;
antheridia exterior, 1-2; vegetative cells 27-3034-45u; oogonia
48-54 X69-76u; oospores 46-5267—74y; dwarf male stipes 18-21 X
30-31; antheridia 13-14X8-10y.
Norway.
44. B. affinis Hirn.
(Pl. VU, fig. 61.)
1900, p. 371, Pl. LXIII, fig. 392; B. minor Al. Br. in Borge 1896, p. 4; Tiffany
1928, p. 150, Pl. XX, fig. 61.
Dioecious, nannandrous, gynandrosporous; oogonia suboblong-
ellipsoid to ellipsoid, patent or rarely erect, below terminal setae or
androsporangia; outer oospore wall longitudinally ribbed, andro-
sporangia epigynous, 1—’; dwarf males near or on oogonia, antheridia
exterior, 1-3; vegetative cells 22-27X27-47u; oogonia 40-46 X 67-78y;
oospores 38-44% 65-76u; androsporangia 18-19 23-30u; dwarf male
stipes 17-19 X 22-28; antheridia 9-12 KX 9-13y.
Australia.
45. B.anomala Pringsheim.
(Pl. VI, fig. 45.)
1858, p. 73, Pl. 6, fig. 6; Wittrock 1874, p. 56; Hirn 1900, p. 366, Pl. LXII, fig.
385; Heering 1914, p. 240, fig. 380; Tiffany 1928, p. 150, Pl. XIX, fig. 45.
Dioecious, nannandrous; oogonia ellipsoid, erect, below vegetative
cells; dwarf males near oogonia; antheridia exterior, 1-2; vegetative
cells 26-27 X52-54y; oogonia 49-51 X75-80u; oospores 47-48 X 73-78y;
dwarf male stipes 18X37; antheridia 13 X 13y.
Germany.
46. B. insignis Pringsheim.
(Pl. VIII, fig. 62.) :
1858, p. 73, Pl. 6, fig. 7; (2) B. pringsheimiana Archer 1866, p. 121; B. speciosa
Wittr. 1870, p. 143; Wittrock 1874, p. 55; (?) B. pachyderma Reinsch 1875, p. 82; (?)
B. anomala Pringsheim in Nordstedt 1888, p. 8; Hirn 1900, p. 364, Pl. LXII, fig. 383;
Collins 1909, p. 274; Heering 1914, p. 240, fig. 379; Tiffany 1928, p. 150, Pl. X XI,
fig. 62; P. B. A. Nos. 1332 and 14380.
Dioecious, nannandrous, gynandrosporous; oogonia ellipsoid, erect
or patent, below androsporangia or terminal setae or vegetative cells;
oospores ellipsoid with broadly denticulate longitudinal ribs on the
BwLbeocHArT E 49
outer oospore wal!; androsporangia epigynous or scattered, 1-7; dwarf
- males near or on oogonia; antheridia exterior, 1-3; vegetative cells
19-25 X48-88u; oogonia 46-56X70-90u4; oospores 44-54 68-88u;
androsporangia 16-20X9-25u4; dwarf male stipes 16-1929-33u;
antheridia 10-13 X 7—10u.
United States: Massachusetts, Michigan, Illinois, New
York, New Jersey, Alaska; Europe, Australia.
46a. Var. reticulata (Nordstedt) Hirn.
(Pl. VIII, fig. 63.)
1900, p. 365, Pl. LXII, fig. 384; B. reticulata Nordst. 1877, p. 32; Collins 1909,
p. 275; Tiffany 1928, p. 151, Pl. XXI, fig. 63.
Outer wall of oospore reticulate-dentate, with doubly dentate,
occasionally anastomosing, longitudinal ridges, the teeth united to
each other by transverse ridges; vegetative cells 20-25 X 40-87; oogonia
44-52 X66-85y; oospores 42-50X64-83u; androsporangia 16-19
13—23u; dwarf male stipes 17-20 X 30-33u; antheridia 11-13 x 6-9u.
United States: Massachusetts, Illinois; Sweden, Denmark.
47. B. imperialis Wittrock.
(Pl. VIII, fig. 64.)
‘ ao p. 54; Hirn 1900, p. 367, Pl. LXII, fig. 386; Tiffany 1928, p. 151, Pl. XXI,
g. 64.
Dioecious, nannandrous, gynandrosporous; oogonia broadly ellipsoid,
erect, terminated by setae; outer oospore wall longitudinally ribbed, the
ribs irregularly anastomosing or connected by transverse ribs; andro-
sporangia scattered, 1-7; dwarf males on or near oogonia; antheridia
exterior, 1-2 celled; vegetative cells 26-31 X32-106y; oogonia 81-83
104-1084; oospores 79-81 X 102-1064; androsporangia 18-20 25-26;
dwarf male stipes 19-21 X30-35u; antheridia 13-16 X 7-9u.
Brazil.
47a. Var. regalis Wittrock.
(Pl. VII, fig. 65.)
1874, p. 55; Hirn 1900, p. 367, Pl. LXII, fig. 387; Tiffany 1928, p. 151, Pl. XXI,
fig. 65.
Smaller than the type; vegetative cells 24-26X72-117u; oogonia
68-70 X88-90u; dwarf male stipe 2039u; antheridia 15-16 6—7u.
Brazil.
48. B. spirogranulata West and West.
(Pl. VII, figs. 57 and 58.)
1902, p. 126, Pl. 17, figs. 8 and 9; Hirn 1906, p. 27, Pl. IV, fig. 29.
Oogonia oblong-ellipsoid, subpatent; outer wall of oospore thick
with longitudinal, crenulate ribs; androsporangia scattered; suffultory
cells without division; setae long; vegetative cells, spirally granulate,
9-12 31-57; oogonia 20-24 KX 48-49u; androsporangia 7-8 X 9-10.
Heneratgodha, Ceylon.
50 THE: OEFEDOGONTACEAE
The vegetative cells of this species are minutely granulate,
with the markings spirally arranged. This character is rather
unique among the ellipsoid members of the genus.
49. B. brevifulta Wittrock.
(Pl. VII, fig. 56.)
pa ae p. 57; Hirn 1900, p. 373, Pl. LXI, fig. 382; Tiffany 1928, p. 152, Pl XX,
Oogonia broadly ellipsoid, erect, terminated by setae; oospores with
outer wall longitudinally and irregularly ribbed; vegetative cells 19-24
X38-72u; oogonia 34-42 %50-56u; oospores 32-40 X 48-54u.
Brazil.
This description is quite incomplete and the position of the
species must be considered temporary until more data can be
secured.
50. B. sanguinea Hansgirg.
1905, p. 437; Hirn 1906, p. 26; Heering 1914, p. 242; Tiffany 1928, p. 152.
Few celled and little branched; cell walls 2—3u thick; vegetative cells
26-35 X 24-50u, with contents blood-red in color; reproductive cells
unknown.
Austria.
Hansgirg gives no figures for this interesting form, but
compares it in habit with B. minor. A somewhat similar
species, B. purpurea Corda (Hansgirg loc. cit.) with purple-red
vegetative cells alternating with colorless empty cells, was
described from Bohemia. Cleve (1895) also observed a red
Bulbochaete, collected in October, 1894. Until more is known
of the reproductive structures of these forms, their specific
position must be merely a provisional record.
51. B. horrida Nordstedt.
(Pl. VI, fig. 42.)
In Hirn 1900, p. 355, Pl. LIX, fig. 371; Tiffany 1928, p. 152, Pl. XIX, fig. 42.
Dioecious, nannandrous; vegetative cells medianly plicate; oogonia
ellipsoid; antheridia of dwarf males 1—’; vegetative cells 16-25 X 12-25;
basal cells 17-20 10—20uz.
South America.
Little is known of the reproduction’ of this interesting
species, and figures are available only for the vegetative cells.
The median plications of the latter, however, readily separate
it from any other species of the genus known at the present time.
Hirn’s record of Lagerheim’s collections in the Guianas in
which dwarf males and ellipsoid oogonia were seen is our only
information regarding the fructification of the species.
OEDOCLADIUM 51
Genus II. Oecedocladium Stahl.
1891, p. 339; Hirn 1900, p. 374; Collins 1918, p. 71; Lewis 1930.
Terrestrial or aquatic, branching, rhizoidal; if terrestrial, partly
subterranean and subhyaline, partly above ground and green; vegetative
cell cylindrical or nearly so, growth chiefly by division of terminal cell
of a filament or branch; asexual reproduction by “‘akinete”’ and zoospore;
oogonium arising by a simple division of a vegetative cell; sexual
reproduction both monoecious and dioecious, nannandrous.
KEY TO THE SPECIES OF OEDOCLADIUM.
0 OLE SEVGIES. 6 SESS e 2 ee ee Pe
PUNOCHOUS nannandrous, aAguatiCunse settles ancient es -~? 4. O. hazenii
SSE PENTA) AG PR ee ia a ge RS ee ee a 3
Le QUEST PGS) SS VRS DS a Se ei ak ee 4
SME RECAUIVCNCElLE/ ZUM eee <5 re cle aus, fe si olen) | EELS + pda aeada ee 1. O. protonema
3. Vegetative cell 12-18 X56-78u.................. oa RY ee Le 3. O. media
FRO OLOMMIM OS OOM rane ciclo eho ethos es oye. ede. 3. O. media
PO) SOIT FU COOL I aerate cidiass t's Sees arcis ss Lee 2. O. albemarlensis
1. O. protonema Stahl.
(Pl. LXIII, figs. 619-623.)
1891, p. 347, Pl. XVI, figs. 1-6, Pl. XVII, figs. 1-12; Hirn 1900, p. 374, Pl.
LXIV, fig. 396.
Monoecious; oogonium single, subglobose, rarely terminal, pore
median; oospore globose, filling oogonium, spore wall smooth; anther-
idium scattered, 1-6; vegetative cell 7X20u, rhizoidal 3X (up to)300u;
oogonium 50-76 X 58-76; oospore 45-60 X 45-60y.
Germany (Strassburg).
2. O. albemarlensis Lewis.
(Pl. LXIII, figs. 613-617.)
In Collins (as O. albemarlense Lewis) 1918, p. 71, Pl. III, figs. 22a and 22b.
Monoecious; oogonium single, mostly terminal, subglobose with
conical apex (if terminal), pore inferior; oospore globose, not filling
oogonium, spore wall of three layers: outer layer smooth, middle layer
angulate (in optical section undulate), inner layer smooth; antheridium
to 9; vegetative cell subcylindrical; terminal cell with conical apex;
vegetative cell 25-40 X50-150y, rhizoidal 4-10 X (up to)350u; oogonium
90 X95; oospore 69 X 69u; antheridium 20-25 X 8-19; zoospore 32-50y.
United States: Virginia (on sandy loam, bank of the
Rivanna, near Charlottesville, Albemarle County) growing with
Vaucheria and Riccia. Collected by Professor I. F. Lewis.
52 Pint © PpoGe on wAcE AE
3. O. media Lewis nov. sp. mss.
(Pl. LXI, figs. 601-603.)
Monoecious; oogonium single, mostly terminal, globose to sub-
globose, with conical apex (if terminal), pore median; oospore globose,
not quite filling oogonium, spore wall with middle layer angulate or
smooth; antheridium 1-2; terminal cell with conical apex; vegetative
cell 12-18X56-78u, rhizoidal 10X(up to)270u; oogonium 52X52y;
oospore 44 44u; antheridium 15 9-15y.
United States: Massachusetts (Woods Hole). Collected by
Professor I. F. Lewis.
4. QO. hazenii Lewis nov. sp. mss.
(Pl. LXII, figs. 604-612.)
Dioecious, nannandrous, gynandrosporous; oogonium globose to
subglobose, terminal or intercalary, pore inferior; oospore globose,
not or nearly filling oogonium, spore wall with middle layer angulate;
androsporangium 1-2, epigvnous, subepigynous, or scattered; dwarf
male curved or erect, on suffultory cell-or more rarely on oogonium;
antheridium exterior, single; vegetative cell 15-26X47-132u, rhizoidal
4X(up to)425u; oogonium 50-75 50-75u; oospore 45-55 45-55;
androsporangium 16X7—12u; dwarf male stipe 18-22 7-10u; anther-
idium 6-8 X 6-7u.
United States: New Jersey. Collected by Professor T. E.
Hazen.
O. hazenii is the only dioecious, nannandrous species of the
genus as well as the enly aquatic member, so far recorded.
Data for descriptions and plates of Oedocladium media and
O. hazenit were supplied by Professor I. F. Lewis of the Uni-
versity of Virginia. Lewis’ O. hazenit makes it necessary to
emend Stahl’s original description of the genus to include this
nannandrous species growing in an aquatic habitat.
OEDOGONIUM 53
Genus III. Oedogonium Link.
1820, p. 5; Pringsheim 1858, p. 68; Wittrock 1874, p. 6; Hirn 1900, p. 72; Collins
1909, p. 223; Prolifera Vaucher 1803, p. 14;, Vesiculifera Hassall 1845, p. 195;
Cymatonema Kuetzing 1849, p. 375; Androgynia Wood 1872, p. 196; Pringsheimia
Wood 1872, p. 195; Conferva (early authors).
Filaments single, unbranched; vegetative cells cylindrical, or some-
times capitellate, nodulose or undulate; basal cell with holdfast; terminal
cell obtuse, apiculate, or hyaline; all vegetative cells, except the basal
one, capable of division; oogonia and antheridia produced by direct
division of vegetative cells.
KEY TO THE SPECIES, VARIETIES, AND FORMS OF
OEDOGONIUM
ievecetative cellsundulate ormodulose... 9.28.58 0 egos. esac dns cne dan: 2
iran eetdiie Cellupunetate Or Sranulate: |.) wens edelein odie. sce bebses 6
ieee Veceratmvercellidistinetiyscapitellate....45-esn ..«sseeeeidedses onesceen. 7
PeVieserabivercelllieygimdrCalinen ) vers cok Hannes en . | eee nce owes asc 35
1. Vegetative cell subhexagonal or subellipsoid....... 236. O68. reinschii*
aso Wh a OCC ENTS 2 0 6600 (2, Lo ys 3
Ps Aaa mye hyoligle sane eh ee ee GR pL Vic Se 4
Se Diameter ot oogonium IS—23u... 0424... 26 osc ue gees 105. Oc. sphaerandrium
3. Diameter of oogonium 48-57. -..............---:- 96. Oc. nodulosum
3. Diameter of oogonium 64-74u......... 96a. Oe. nodulosum var. commune
Ae Diametermowoogonianml 44-0644... -....-anneneo ate. Ser sceose.:
4. Diameter of oogonium 58-68u...119a. Oe. undulatum var. americanum
5. Dwarf male 36—46u in length.......... 119b. Oe. undulatum f. senegalense
ee Owanrhamale A8—/Owanlengthess. 4.0 4..<..22:1s40ee- 119. Oc. undulatum
6. Diameter of vegetative cell 6-Su............ 155. Oe. elegans
6. Diameter of vegetative cell 9-13u........... 84. Oc. minus
6. Diameter of vegetative cell 16-22u.......... 85. Oc. punctatostriatum
A, Wiftitlvonnr Chine Toi Ra een 5 cme oN eneU an tk ee re rr 8
NH ME Glvyaislptincll ag Ae PRT ee Staves sank h a eee «koe kG eis ote he Ba irae Gone 17
ieee eproductive structures impertectly known... 0.3... 0. cc kee dee eens 34
Bi, DROVES SS o cre a ae cece a MERIT © ete ec Sen a an eee 9
SEE MOTOR CIOS are WR r at Saker, tattrn wiarinc in. an 5 sashes voto ale: «tae oe 11
PEO it1O Ol COPONITIMDASAL Jo. 6 lig gis he ees ss ss 78. Oe. infimum
9. Division of oogonium inferior........ 1s a eee 77. Oe. inversum
Cee Dvr OMeOrOoOZOniuimapmolediaines.t0. sm sy ctlens asco aes cae eee cv a owteee sos 10
9. Division of oogonium supramedian or superior..... 89. Oe..mitratum —
10. Oogonium 26-29u in diameter... 79a. Oe. howardii var. minus
10. Oogonium 29-32u in diameter............... 79. Oc. howard
10. Oogonium 32-36 in diameter............... 81. Oe. latiusculum
11. Oogonium opening by a pore.......... 20a. Oe. hirnii var. africanum
PME Ott mOMenim Vea LG oro. oc bese bene cme dist eee deanna saide as 12
ee OiaimeLvemomoo soni LOZ. 5. ooctsice a oe ceases vce ed one eM Eas 13
Zee Dice terOMmOOP ONT O4—4 Ou . sis 5 cede aes som on weds 6 ows eee 16
Lee Div tSIOf OMOOLONiMl MECIAME. 5 .ccce cmos Seb neu sngued ovo osiee es ehee ble 14
eee mAMOn OL COSI SUPLAMEeCIAN.:....... 56 eg een dence eea tees eine cee’ 15
14. Oogonium subdepressed-globose............. 86. O8c. capitellatum
145 Oorontum-angular-globose............5.-.-- 87. O8c. quadratum
id= Msameterioft oogonttum 15=20n.......... 065.2050 55 210. Oc. virceburgense*
ise Osameter of oogonia, I8—Bap.. 2... ne cn ee es es 105. Oc. sphaerandrium
jee Oirameter, Of OOSOMilM 2O-2ou.... .- ns. cess se ee oe 211. Oe. spurium*
*Species so marked have incomplete descriptions and are included in what is
perhaps their probable position in the genus, using such characters as are available.
o4
17.
THE OF D OCONEACG EAE
1G” Viecetativercell punctatesse 4.5 eee cna 84. Oe. minus
163) Vegetativercell not punctaresassen eee aoe 88. Oc. bohemicum
Porteous ...5.o 5a Oe eee 120. Oe. nebraskense
Operculate sia.ces ces iiacc Oren Ieee eee Re IE ee cen ee ee 18
18 Divisionjohooconitmmimnediangae mee eee 19
18:, Divisioniol oogoniumistipramediant 5.) 7.602 oan nie 24
1852) Division omoozonium aininamediansns-rri en ese oe nee eeee 26
18. Division of oogonium superior.............. 156. O8c. rigidum
185 {Divisioniok oogomilimysupreme: sneer eee eee eee 29
Divisioniof oogonitimmarkowee sot eee Ee cee 20
Divasionvolsooroniumwidensa peek caeioe cee SEU cee eee eee 21
20. Oogonium 28-35 X 28-38u....... 17la. Oe. decipiens f. dissimile
20. Oogonium 46-54 X 44-54u...................157. Oe. bengalense
20°) Oogoniumrbs7—64 GAS 53 eee ee 158. O8¢. indicum °
Diameter. of oospore: 22-261 neso sec eeoe ee On e eee 22
Diameter of oospore 30-32u........... 160b. Oe. areschougi {. robustum
Diameter of oospore 42-4807 — a=. 3. hee ee eer eee 23
Wiametemot oospore4s—oamase aici 159. Oe. brasiliense
22.) eyymanGdrOSpOrOUusic..stiss aa renee ee eee 160. Oc. areschougu
22 idioandTrospOorouses.ssse7 aoe 160a. Oe. areschougit var. americanum
Vegetative cell 14-19u in diameter................ 157. Oc. bengalense
Vegetative cell 19-26u in diameter................ 161. Oc. confertum
24. Diameter of oogonium 14-26yu............... 163. Oc. clavatum
24> Diameter omooronium 27-4244. + eee eee eer 25
24. Diameter of oogonium 50-55u............... 173. Oc. costatum
24. Diameter of oogonium 58-65u............... 174. Oe. boreale
Oogonium 19-25u in length............ 164a. Oc. oelandicum {. minus
Ooronitumy 25-527 intlengtheses sn. eee ae 164. Oc. oelandicum
Oogonitum 40-45, in) lengthier ee eee 165. Oc. megaporum
26. Suffultory cell enlarged......... 167b. Oe. platygynum var. continuum
265 Suttittory. cell notaenlarced: see eae oe eee ee eee 27
Diameter ot -vegetativercell G-l0us 5. a-- oa. cea eee ee 28
Diameter of vegetative cell 12-l5u................ 166. Oc. bahusiense
28. Gynandrosporous only.......... 167c. Oe. platygynum var. novezelandie
28. Idioandrosporous only.......... 167a. Oe. PEE obtusum
28. Gynandrosporous and idioandrosporous......167. Oc. platygynum
@osporetwall:smooth::.:.. “oe Sonen. steers ae ene ee
Oospore wall longitudinally ribbed................194. Oe. michiganense
302° Tidtoandrosporous: Uaiae oc serie eae tioee i eeeeee a ao Creer
305% ‘Gymandrosporousss.cc.n ss fora ee eee 32
Oovomumi4s=60 62> (4s. 345 ene eee 190. Oe. praticolum
@oronium 66-18 72-90 ure eae eee ee eee 191. Oc. supremum
32. Diameter of oogonium 36—-42u............... 192. Oe. wabashense
o2. Diameter of oogontumirAl2—ooan. i aes tae ee nae ee 33
32. Diameter of oogonium 55-58u...189a. Oe. obtruncatum var. completum
Beng tiohoogonium~oG-beuee eee seeee eee ae 189. Qe. obtruncatum
Length of oogonium 68-75u............ 189b. Oe. obtruncatumvar. ellipsoideum
34. Vegetative cell 2-3u in diameter............ 203. Oe. fusus*
34. Vegetative cell 4-6u in diameter............ 210. Oe. virceburgense*
34. Vegetative cell 6-13u in diameter........... 211. Oc. spurium*
Diameter of vegetative cell not more than 2u...... 197. Oe. angustissimum*
Diameter of vecetative:cell' 2-602. soe er ee eee Eee Cee oer 3
Diameter of vecetative cell766—=)G0=938n. 22-2) a eee ee 268
36: “SWithoutidwartamales 27505 2. 1s ees sr eee ce eee en ere ne eee 37
36. ° Wath dwart tnailesia os 74 aha eee Oe ete ee cee ae 186
Oogonium ‘opening by a pores?.2: <2. ce face -= ae See ee eee Cee 38
Oogonium opening bya did is: i-32h..)eee.s nc eed oe ee eee 139
38: ‘Pore median. on Rae, Hee cre sine ions Sen ceca Pere Cree See tee 39
38. Pore supramedian (rarely varying to superior).................... 51
38.” Pore superior... si $ 04 sees eaten © eas ee ee eee ee 63
*See footnote, page 53.
{Some variations of Oe. varians may be sought here.
OEDOGONIUM 55
Wiclikois OOSPOnesSimOOUls vee ercicl. salcitiss setts sis re cee cee nace ehldn esa’ 40
Wielitotsoosporerscroniciwlateres. 1. nes dac-s 0% ce oe ce wen vealoctutenee sel 49
WralllkoroOsporerechuatevcec css Accs 4 c.cbciie ds comes eccssvasdece cone cuca 50
ARE LOMO CCIOUS HMR nG Faience rors cie ee e ise beste steeceua meee es 41
At) ED TOCCIOMS meets See nian ae cis oF ueeiEe aieinis lad miler ace cas wes ate ones 44
DiamMeTreMOMOOUZOMUM SAC Ks ss cSe a cieloss soc sles ese nbseeccdecneod® 42.
Diameter of oogonium 32-38y.........5.20.05.:.+. 1. Oe. laeve
42. Filament irregularly curved................ 2. Oe. curvum
APM ATO eH CESLG ATM ie Mier ieee Geir Si © ccs cla Sale we dcreelune sos 43
Ooronimim 25=28 Xe 26S ek seal ese See eae 3. O08. cryptoporum
Oogonium 18-25 X 18-26h............. 3a. Oe. cryptoporum var. vulgare
AAS Diameter OmoosomilUumme Arete ss Gos See cn scree cess cis Seale cans
AAP eM iaIMetet OlMOOCOMUM lA (—OoMe os es. sacks Sons cee cee cn eeeneeees 47
AAS e Diametemot OOsOnitin SU=GO.. 265-8. Se ive oss ces bs sek ou slne ones 48
Drametemotmecetative cell o-lOue eee oct cies sce 6c are vache cbse sans wets 46
Diameter of vegetative cell 8-I3u..... 4b. Oe. rufescens var. lundellit
46. Diameter of vegetative cell5-Qu 4a. Oe. rufescens var. exiguum
46. Diameter of vegetative cell 8-10u........... 4, Oe. rufescens
Diameter of vegetative cell 9-llu..... 218a. Oe. inerme var. mentiens*
Diameter of vegetative cell 11-l4u................ 5. Oe. calcareum
AS OOSPOLEHS OOM a oS TOON. i. a. cincinnati eee 6. Oe. sociale
AStaOOSPOLCISd TOS) NUL ROL. snes cesta oe pac 218. Oc. inerme*
IMOnOECIOUSSe seers ore oe ac ce ese a caw en emeee st 7. Oe. cymatosporum
Dioecious (very rarely monoecious)............... 8. Oe. magnusit
50. Diameter of vegetative cell 9-l4u........... 9. O68. suecicum
50. Diameter of vegetative cell 14-16z,
9a. Oe. suecicum f. australe
Oospore scrobiculate, 22-27y in diameter.......... 217. Oc. moniliforme*
Oospore scrobiculate, 43-48y in diameter,
66a. Oe. argenteum f. michiganense
Oosporeismoo umes teres: ool snss5 82 dae shapes otc At oe sens oe ees 52
HUME LOTOCCIOUSHEE Eee SS 5.05 Sak 300 55 LER oa wa ieeiagaig sina 6 hae. 53
SDE DIO CCI OUSHE rat Se see aS oS ROE coe gee mans Ha eae gas 58
52. Both monoecious and dioecious............. 10. Oe. varians
IRoserapiiitictabovesimedianuted< Tat oe hoes bent ad nie Geyser .'s 56
Pore variable between these two positions.................00 ee eeeeeeee 57
je Diameter ob oogonitum 34-450" 0.0 .aeen. 2.....-s-- 5. Rae Seed 55
54. Diameter of oogonium 46-55u............... 11. Oe. urbicum
Oospore depressed-globose, 30-34 K 28-32u........ 12. Oe. obsoletum
Oospore regularly globose, 30-39 * 30-39y......... 13. O8c. plusiosporum
Dow Oospore sl—4l x -30—-4) ae. seas es 10. Oe. varians
bom Oospore.40 48) 40-482. Phase es ees 14. Oe. tyrolicum
Terminal cell narrowed and often setiferous....... 225. Oe. inflatum*
Terminal cell neither narrowed nor setiferous...... 11. Oc. urbicum
Sis, [torre a, Iniimel evel ovonyasanleye behalf 5.5 ante Ces EERO hee eerie ene 59
DEP OL HNe Ailes MCI OL Mewar kin ess tree ae ste asst owe bess 006 60
58. Pore variable between these two positions....................05-. 62
Vegetative cell 1-3 diameters long.... 15b. Oe. cardiacum f. pulchellum
Vegetative cell 3-7 diameters long................ 15. O8c. cardiacum
60. Diameter of vegetative cell 8-12u........... 16. Oe. franklinianum
60. Diameter of vegetative cell 12-l6u.......... 10. Oe. varians
Hae Diametenommeretanive cellil4—80 oe see es oie’ eee ee ace 61
Oospore depressed-globose, 31—42u in diameter,
15d. Oe. cardiacum var. minus
Oospore subglobose, 42-49u in diameter........... 17. Oe. glabrum
Oospore globose, 43-58u in diameter.. 15a. Oe. cardiacum f. interjectum
Oospore ellipsoid-globose, 40-52u in diameter, :
15c. Oe. cardiacum var. carbonicum
62. Oospore not filling oogonium................ 225. Oe. inflatum*
62. Oospore completely filling oogonium........ 18. O6¢. lautumniarum
*See footnote, page 53.
56 VT aE HOE DOGO AGE AE
635" Wallsofioospore smooth ape sats 10a cate eee ne Eee nee 64
Oda otfoospore:lomenitu chimealliltvarrst oye Ge a eee eerie ee 116
63% Walliotoospore:anrcOla tenet pon. oa. Ree 129
G3 Wialilkoioosporesmeticullaite nu at. &.n - Weiess enc = acacia eee eee 131
63:0 Waillvoiioosporetpiitedhaok, «05 a Se hac bye ain sis cos Je te ee eee 132
63. Walltoioosporeisenobicullaite:. 7 52 arr a. ere on een Sencar eee eee 133
G4a@ Mon Geciouset ett sc. och ap PC aoe a NE ee eee 65
G4 ADIGECIOUSH ei es S 55g bd oy Oa he ee ee 83
64. Reproductive structures imperfectly known....................... 113
65. Diameter ot vezerauive celliS—o4 0.5. see fee nee ee eee 66
65. Diameterol veretative cellis3—540. 2. . a. cise de ee eee 80
665 Diameter of cogonitum»s2—s6)(—40))u25 5-4 a eee eee 67
665) Diameter of oogomium:s0-OSstee 1. 4a ee ee eee 70
66. Diameter of oogonium 63-68yu... 29a. Oe. upsaliense var. fennicum
Of... VegetativercelliS=l4inidiametens 49s. see are tone eae re ee 68
67. Vegetative cell 15-18u in diameter................ 19. Oc. intermedium
68. Length of oogonium 32-46u................ Fti4 Oe scar ar AN ae a A 69
68. Length of oogonium about 53u.............. 226. Oe. warmingianum*
69° Oospore 28-3illeamidiameter- 4...) 525.55 eee ennee 20. Oc. hirnw
69. Oospore 30-37 (—40)u in diameter.................. 21. Oe. globosum
(Os elanttewrcelledswhentmatune: see ener ee eee ee 71
(On selantamany celled whenimattine ease an: eee eee nee: 72
71. Antheridium single, alternating with vegetativecell. 22. Oe. zigzag
(ineAnthendium'=l—4 imiseniest..--eereenee aaa 23. Oc. curtum
2. Oospore globosesto;subelobosess1.-0 06 5 eee eee eee ee 73
(22 Oospore Obovoidetorelllipsaicd aaa tei eer eee ee 77
das Diameternonvesectativie cellu 101i. nae ety a nee eee 74
(a> DiameteronveretativierCellelO=o4rcgaa irae aes eee nee 76
(4, ‘Oospore completely fillingioogonitim..-) 4. nos ssee eee ee 75
74. Oospore not filling oogonium.... 19a. Oe. intermedium var. fennicum
OO: > pA Me THelacI Lassen. cs, egy: Seer en ee ge een 24. Oe. fragile
(on eAnthertdiuimyo—-Ole. sence aoeeeee 24a. Oe. fragile var. abyssinicum
76. Oogonium usually globose...... 24b. Oe. fragile var. robustum
(Op Oogonium»usualllyxovoldeasn een tern eerenitr 25. Oe. vaucheru
77. Division of antheridium horizontal................ 26. Oe¢e. richter1anum
i”. “Division of antherndium vertical: .6+. 30.5... <,.4e eae ee 78
78. Vegetative cell 8-14u in diameter........... 27. Oc. pseudobosci
ios Wegetativelcell 14-24. “inidiameten seen seen ae eee eee 79
(95 Oogontam 40-44 >< 70=S80n. ee eee aeons 28. Oe. sodiroanum
195, Oozontum 45-50 << 66-100n Sena cements ee sare 29. Oe. upsaliense
(9s Oosonimm48—b5 \Gb=e0u pee ee ee eee 30. Oc. oviforme
SOs Diameteror OocOnitm Od Ole aaa eee ene ee 81
8058 Diameter of cozoniumiG8—9due. «eee eee eee 82
81. Diameter of vegetative cell 37-48u................ 31. O68. geniculatum
81. Diameter of vegetative cell 50-54u................ 32. O8c. subocitangulare
82. Diameter of vegetative cell 33-37y.......... 33. O80. martinicense
82. Diameter of vegetative cell 44-52u.......... 34. Oc. kurzuw
83. Diameter of vegetative cell 11-l3u................ 223. Oe. lageniforme*
83. (Diameter otvegetativercellil4—bGi ee eee ee eee eee nee
84. Oogonium scarcely exceeding vegetative cell in diameter.......... 85
84. Oogonium noticeably exceeding vegetative cell in diameter........ 86
85. Oospore globose to cylindric-globose.............. 35. Oe. capillare
85. Oospore cylindric-globose to subcylindrical,
35a. Oe. capillare f. stagnale
85. Oospore subrectangular-ellipsoid.................. 32. Oc. suboctangulare
86. Oospore globose, subglobose, or cylindric-globose................. 87
86. Oospore ellipsoid, obovoid, subcylindrical, or subellipsoid......... 95
8@ Maleiilament of samevdianietenaspremial Gn. seeerrn) are eee: 88
Si.) Maletilamientismealilersthan) females nmi. (1 eee er eee eee 90
88. Oogonium 36-42u in diameter... 36a. Oe. plagiostomum var. gracilius
88. Oogonium 42-49 in diameter............... 36. Oc. plagiostomum
Sos Ooconium 54-68 in cdiameen ss ane eae aoe ae eee eee 89
*See footnote, page 53.
113.
113.
OEDOGONIUM ae
Vegetative cell 16-26 * 112-250u.................. 17. Oe. glabrum
Vegetative cell 33-42 X 42-130u.. .... 38. O6e. princeps
90. Diameter of male v egetative cell 18-33 “led. EOF: Re Ol Se eae ea 91
90. Diameter of male vegetative cell 34-5Qu.......................... 94
Oospore usually ellipsoid to cylindric-globose...... 37. Oe. capilliforme
@osporeiusuallly clabosetolsubsloboseyees. 8.2. nda ct cece ee dee uses 92
DED ivisionromanthencdimmyhonizontaleeassess 62s .ce.soes.cecs-se. n. 93
92. Division of antheridium vertical............ 39. Oe. biforme
Oogonium 40-53 X 40-65y............. 37b. Oe. capilliforme f. lorenizit
Oogonium 46-57 X 52-64 (-80)u....... 37a. Oe. capilliforme £. debaryanum
Oogonium 36-53 X 48-60u............. 37c. Oe. capilliforme var. australe
94. Oogonium 46-564 in diameter... 37d. Oe. capilliforme var. diversum
94. Oogonium 54-65u in diameter............... 40. Oe. anomalum
94. Oogonium 70-85u in diameter............... 42. Oe. rivulare
Diameter Ooozoniuim so -OonC-OS)iinee sds ss oes se fe hea. deo oe ve 96
Diametrernovoozonitm (GO=)G3-90ws -. 408... 2 oe cn ben boobies cc hones: 106
96. Male filament larger than female............ 43. Oc. pachyandrium
S65) Maile filament notlangen thamtemale,... 22.2.5. 5...0..2.4.-0cssc- 97
WeretativercellMl—S diameters longa ile anne ee ee ies wa dsc deca 98
Weretativercelli2-Gidiametenslome=s ase sia enas tes ec ee os ee ens 100
Wegerativeicellig—lledvametens, lone: jn a.lseei eee cn ns oa va awk. 102
98. Oospore 40-60u long............ 35a. Oe. capillare f. stagnale
OS see OOSDOLGIOUS CULE lOMe in sancti nhs Stn ini8, APM EMR pe en es 99
Diameterioroospone lollies secs. eee oe: 209. Oe. oryzse*
Diameter of oospore 40-56u...........209a. Oe. oryz@ var. seriosporum*
Diameteromoospore ol—OUweesre. s.-2 606s e nse 44. Oe. mexicanum
100A Cellsdiameterion malewnlament 18-282. 98-4 os seed. ose es 101
100. Cell diameter of male filament 28-33u....... 45. Oe. grande
100. Cell diameter of male filament 32-42,,
45d. Oe. grande var. majus
Oogonium usually obovoid............ 45b. Oe. grande var. aequatoriale
Oogontuni usually subobovoid.............. 05.925: 39. O8c. biforme
102. Division of antheridium horizontal,
15c. Oe. cardiacum var. carbonicum
LOZ ee Divistonromanthenridiumi wenticale..). 1,082 5405 5266s nea ascns nae 103
Woconiumyuisuallyrobowoids ens: 0.1.5... eee 46. Oc. oboviforme
Oogonium usually cylindric-obovoid............... 39. Oc. biforme
Oogonium usually subovoid or ellipsoid-ovoid.........................5. 104
104. Diameter of oogonium 42-52u... 45c. Oe. grande var. angustum
1025s Diameter ooorgonimmy 49-84. ay yee ewes ke eco deca es 105
Diameter of vegetative cell 20-27u.... 45a. Oe. grande f. gemelliparum
Diameter of vegetative cell 28-87u................ 45. Oe. grande
Diameter of vegetative cell 36-46u.... 45d. Oe. grande var. majus
106. Oospore conspicuously not filling oogonium.. 42. Oe. rivulare
LOGE Oosporemeanlwoneuite tillinesooconiumeyns se nese ls ss). oe 107
Mereraunercelilel—Gidiametens lomg sent. u.. cee tet sae oes msde ees 108
Vegetative cell 6-10 diameters long............... 47. Oe. subrectum
LOSSeCellidiametenomealestilament 80-37-4415. 52255-2205 .0¢005 nee ve 109
LOS Gellidiametemormnalertilamentmeb—O0Me sso. oes sec acs oe. .-e aoe se: 110
@osporelobovoidstorellipsoid=s.- 2.) 4.0.50... 20 48. Oe. landsborought
Oospore ellipsoid to globose-ellipsoid.............. 49. Oe. crassum
Eee etieerta i OOSPONCM fic LOU fle Ne on Sk oa Ath csoa oes al pee ee eases ACL
110. Length of oospore 100-125u..... 49b. Oe. crassum var. longum
Diameter of oogonium 64-73y......... 48a. Oe. landsboroughi var. norvegicum
DiAmMetemomooconiimnlo-O0 wwe wee eye Aoisi deo. ecole ae ae auadawt ms 112
112. Vegetative cell 1-3 diameters long,
49a. Oe. crassum f. amplum
112. Vegetative cell 3-5 diameters long,
49c. Oe. crassum var. subtumidum
Diameter of vegetative cell 6-24 (G27). - 2. so. hace tect ace eet e peeves 114
Diameter of veretative cell 24490... 3. ose ccc ee ee ese aaa’ 115
*See footnote, page 53.
58
115.
115.
wa.
il7e
Te
LS:
J 4
121.
121.
123.
123.
125.
125.
127.
127.
129.
129.
131.
131.
133.
133.
135.
135.
137.
137.
137.
THE OEDOGONIACEA®E
(AP OoconiumlabouitoomGIoh ee ane eee 226. Oe. warmingianum*
ITA Oozonitmtsso0pe 45-Onleeeeeeee eee eee ee 223. Oc. lageniforme*
114), Oogonitum’3(/—49) x 54-16 ee ee 225. Oc. inflatum*
Oogonium’/43>55.X 40-95 ues wae ee eee wee oe DU0s Oemorizcs
Oogonium 42-60 X 43-99y............. 209a. Oe. oryz@ var. seriosporum*
116.. Outer oospore wall ribbed externally........ 50. Oe. exocostatum
116:. Middile*oospore-wall sibbedextermallly2on.05- ee eee aes 117
Ribsicontiniotisvandrentire’.. ..).he ae a ee ee DE ee eee 118
Rubs) cranulatercnenate) crenulate yon pitcedaee ae ene eee ene 126
Rabsidentate weer eerie cisions oe 57b. Oe.crenulatocostatumvar.aureum
1837 Ribsb=22 stinenuamibers<245.:,. ae stan Le ae ee eee 9
LIS.» cRalbs?26=3 byaaaenntarrally ex: aare.c cyte. esate coo cor eae Ore 120
LIS Ribs —opmenum bDetasan teen seer re cae 51. Oe. kjellmanit
Vegetative cell 10-15u in diameter................ 52. Oc. paulense
Vegetative cell 24-30u in diameter................ 220. Oe. urceolatum*
120, )AMIONOECIOUS feos etter Ae ee ae Ie ne ene 121
120: SDiGEClOUSie yes co Bee oe I ee ee 123
@osporeicompletely, fllinssoozonitime eee eee eee eee Ere ere 122
Oospore not filling oogonium.......... 53b. Oe. paludosum var. parvisporum
122. Oogonium 39-48u in diameter............... 53. Oc. paludosum
122. Oogonium 54-63y in diameter... 58a. Oe. paludosum var. americanum
Oospore usually completely filling oogonium....... 54. O8e. leiopleurum
Oospore usually, not fillineioorontumil ese ee eee 124
1245 Oospore ellipsoid? 5)... :nee eect eink als oe Oe Cee et ae 125
124. Oospore ellipsoid-globose, rarely subglobose,
55a. Oe. bosci f. dispar
124. Oospore ellipsoid-obovoid or obovoid,
55b. Oe. bosci var. notabile
Diameter of oogonium 33-388yu......... 55c. Oe. boscu var. occidentale
Diameter oroogonitmo9—olu.s.-.56 ee. eee 55. Oe. boscu
126: Ribs t4=20 im nuimber? s7s..vac cn seeie sa.o ee ee ee ieee 127
1265) Ribs s0-s5aninumiber ea -ree ree ace meee 56. Oe. margaritiferum
126, Ribs 30-45 im number aa. ee - e eee 51. Oe. kjellmanit
Rabsitcrénulater ss in. iss Soe, Leer ih ee ee Pe: 128
Ribstcnenatekecnccce ee caer, 57c. Oe. crenulatocostatum var. longiarticulatum
IQSseuRabsidistinetlycrenulaite eee cece eee 57. Oc.crenulatocostatum
128. Ribs scarcely crenulate.. 57a. Oe. crenulatocostatum f. cylindricum
DI OSCLOUS Sf obi Sara ss os cre ites SOEs STO SPOS see 130
IMionOE CIOS a shots tS as Bee atau ocet eee 58. Oe. arcyosporum
130. Diameter of oogonium 30-35u. 57b. Oe. crenulatocostatum var. aureum
130. Diameter of oogonium 48-60u............... 59. Oc. areolatum
130. Diameter of oogonium 66-72y..............- 214. Oe. hoehnei*
Oogoniumss—40 e581 One enieere 60. Oe. dictyosporum
OogoniumrapoutAg CSCIC CRIN eee Re eg en 142
RAMS SOU OOMMENUTMDeL eee tei e cits eet ce techs wbawhls news. sotew: 143
142. Diameter of oogonium 48-52u... Tla. Oe. paucocostatum var. gracilis
142. Diameter of oogonium 54-60y............... 71. Oe. paucocostatum
142. Diameter of oogonium 59-74u............... 72. Oc. australianum
DROCCIOUSH NENT pms Rohe ee tae elem 73. Oe. tumidulum
NICH OCCIOUS HEME Tarte et rot eet dae tees, ees oc ke cctaia sn ouethg aly t 144
Reproductive structures imperfectly known........ 219. Oe. sol*
ta Oospore 48-09) Xe O0-OShe aes ee aes dee oa 74. Oc. nobile
144. Oospore 58-59 X 72-80u........ 74a. Oe. nobile var. minus
1Aae Oospore Goo) ~S8—lO4us ee tn eee 75. Oe. insigne
Moraninmi weno projections. | oA. Wee eee Ree hee oe ste he eet 146
Miespeairitise wih) PEOFECIIONS meee DCia > Ocoee ioe aoa 153
1G, IMMOTMOCNOTES:.. «oo oo 5 acd GOO EO So caine i Cee ae ar oro ere 154
Diameter of oogonium 29-33y................006- 79. Oe. howardit
Diameter of oogonium 33-40y.................... 80.. Oe. pratense
iad Oovzonitim subslODOSEs:<4.....0 cae. + +. oe = 82. Oe. acmandrium
1545 Oogonium pyriform-globose:.......-..-...- 83. Oc. psaegmatosporum
WPIOECIOUS ian see's “HG dccidj2t Sid Cin eee ee Ea 89. Oc. mitratum
NIGH OCCIOMS EIN Ie epee fever Fenleiccs cas tie stg vee ee 90. Oc. petri
JNTaitdl RETETG MUBTEM FAVE, LECOLON AALS ors Coo Bin Gebee Bema RSME Onre eRe oe re Cie eee 156
156. Oogonium 15-20 * 15-23y..................210. Oe. virceburgense*
156) “Oogonitim 27-28 X 26-28n.... 2... det suse we: 222. Oe. consociatum*
IDNOEONOES ohne oe W616 a RO GORI OO GRO IISae DENCE ics iP a tare 158
LOTUS ISITTIS. 2 ce Sci 6 wo BO Bod OS ORD IESG ERG an vo) IER at tea 165
Both dioecious and monoecious.................. 91. O68. trioicum
Reproductive structures imperfectly known................6.0+ see eeeee 183
158. Diameter of oogonium 13-l6yu.............. 91. Oe. trioicum
15sseeOtameter Of oosoniunml 16-430). 26.2 see ce eee ee reese Jace tad,
158. Diameter of oogonium 43-50u.............. 92. Oc. welwitschi
158.. Diameter of oogonium 52-60yu.............. 93. Oe. 1owense
158. Diameter of oogonium about 82u........... 94, Oc. dioicum
eer mI OOSE LO SUDZIODOSE.......5. 005-25. eb eee eee tee ee enon es 160
Wespore ellipsoid, ovoid, or Oblong... 1.0.0... hice eee ee eee see 162
*See footnote, page 53.
60
THE OF DOGCON FACEAE
160. Vegetative cell 1-3 diameters long,
95a. Oc. pringsheimii var. abbreviatum
160") Vegetativeicelij2-oidiamietersvongaer ce. eels ee 161
Female vegetative cell 10-15u in diameter,
95b. Oe. pringshermi var. nordstedtii
Female vegetative cell 14-20u in diameter......... 95. Oe. pringsheimii
162. Diameter of oogonium 16-20u... 99a. Oe. pisanum var. gracilis
1625 (Diameteriotoocontum2s—20 ne ae eee eee eee 163
162. Diameter of oogonium 28-38yu............... 202. Oe. sancti thome*
Oospoze filling oogontamimlongitudinallly, =). 5254s eee eee 164
Oospore not filling oogonium longitudinally........ 97. O80. porrectum
16455. Basal. celltelongater 70-0) 2c. 4. tee 99. Oe. pisanum
164. Basal cell subhemispherical.............-... 98. Oe. nanum
Oosoniuma pyaitornatolsubpiyscito ride cee eee eee ae 166
Oogonium obovoid-globose to subglobose.....................2....000-- 169
Oogonrumvellipseid to1oblonges.. 947-48. o o eee Eee ilZ/7/
1665 *Diameterorvesetativie cellS—lilin snares ee eee 167
166. Diameter of vegetative cell 11-l3u.......... 102. O8c. simplex
166. Diameter of vegetative cell 13-I6u.......... 100. Oc. pyriforme
Diameteromoogonium 2o-s0Ws..s5 00 ol eee ee eee 168
Diameter of oosonium: s0-s3u--) 4 - eeeee oee 103. Oc. pyrulum
Diameter of oogonium 3440y......... 103a. Oe. pyrulum var. amplius
168. Oospore subglobose, 22-26 X 21-24u......... 104. Oe. loricatum
168. Oospore globose, 25-29u in diameter.........106. Oe0. pithophore
Diameter.ofvecetativercell Sl6ie- seek ae see ee eee 170
Diameter of vegetative cell 16-20u................ 107. Oc. autumnale
Diametermokwegetative celle20—2 jae eee ae ee eee 176
IZ0= Oosporesnot tlle toGronilim: oases a see eee ee ee 171
i705, ‘Oosporeyhilling, cogonmiGm=-mapeoe ene noe eee eee eee 172
Diameter of oogonium 30-88y......... 109d. Oe. crispum var. hawaiense
Diameter of oogonium 40-43yu..................... 108. O8. obesum
172. Diameter of oogonium 23-28u............... 104. O6¢. loricatum
iW2Ze sDiameter or ooconium s0-osise 6 eee eee eee eee 173
i722. Diameter omooconiumiss 00 Wes) aoe ee arene eee 174
Vegetative cell 1-3 diameters long... .109e. Oe. crispum var. uruguayense
Vegetative cell 3-5 diameters long... .109c. Oe. crispum var. gracilescens
WA Oorsonitimrobovoidseloboses., pean ee eee 175
174. Oogonium subglobose........... 109a. Oe. crispum f. granulosum
Diameter of oogontum 38-45... 22.24.52 - 6 ee ee 109. Oe. crispum
Diameter of oogonium 40-50u......... 109b. Oe. crispum f. inflatum—
176. Diameter of oogonium 44-49u...110a. Oe. rupestre f. pseudautumnale
176. Diameter of oogonium 48-58u............... 110. Oe. rupestre
Diametes oh oogoniuml9—l4i22 52 es ee 201. Oe. selandie*
Diameterok oosonimmMelS—19 in ete ee eet ee ee ae 178
Diameter-oroogonium: 2028p) 24.00 45 ie oe eee 179
Diameter of oogonium 35-42u................5.... 111. Oe. ahlstrandu
Diametenotoosontumo0—/0nees ease oe aoe 112. Oc. pachydermum
178. Length of oogonium 25-28u................. 91. O68. trioicum
iS: Length of cogonitumis4—40 ne a an ee 114. Oe. gracillimum
@osporenearly or quite filling oosoniuml 42. +. ee eee eee one cee 180
@ospore not fillmeoosoniumyloneitudinallly, 924" ee eae 181
180. Vegetative cell 7-9 X 11-86y................115. Oc. oblongellum
180. Vegetative cell 8-15 X 16-60u...............118. Oc. kirchneri
Oospore oblong-ellipsoid..............114a. Oe. gracillimum f. majus
@osporeieloboseyeess4saee eee reree 116b. Oe. oblongum f. sphaericum
Oosporevellipsoids #3532 Oe de Ra oe ee ee eee 182
182. Diameter of oogonium 20-26u............... 116. Oc. oblongum
182. Diameter of oogonium 26-28u...116a. Oe. oblongum f. majus
Diameter of oogoniuml 9—l4n2 0.52. 23 ee see oes 201. Oc. selandie*
Diameter of oogonium 28-33y....................- 202. Oe. sancti thome*
Diameter oh cozontum) c)—-44 pos. ae eee eee 204. Oc. rhodosporum*
Diameter of oogonium 40—45u..................... 205. Oe. vesicatum*
Diameter of oogonium 40-50y....:................. 206. Oe. montagner*
185.
185.
187.
187.
187.
187.
187.
189.
189.
191.
191.
191.
193.
193.
195.
195.
197.
ii
197.
199.
£99;
oe
199.
201.
201.
201.
201.
OEDOGONIUM 61
184. Oogonium with mammiform projections.....118. Oe. mammiferum
184. Oogonium with conically obtuse projections...................... 185
184. Oogonium with projections intermediate between the two above,
117a. Oe. itzigsohnii £. heteromorphum
Diameter of vegetative cell 5-7u...... 117b. Oe. itzigsohnii var. minus
Diameter of vegetative cell 8-l0y.......0......... 117. Oe. itzigsohnii
DIOECIOUS, NANNANDROUS, WITH CYLINDRICAL VEGETATIVE CELLS.
she Ooaronium openins bya pare penne ce. bee oe bons ot SS ER Pad. 187
[Sie Oosonrum Gpenino byeagliGun see. te wicee te nae he eee. 228
Pore median, or alittlejabowemedian Sivek. ace baton eo ws. 188
Pore inframedian.....................128a. Oe. hystrix var. canadense
BOWE Soharesia lad ei al gmeg so as peck oot a Oe ene ee ee 2 201
BREESE CITOEIES tr MPO Cone toe ee ey at ae ee hs AN yet Bene 202
IER SULbe ChE, ae a BG ee ce eles Lo A Oa ak ae ne Aaee Pe 226
Tey ali GOSNOTE, CChina Lela. .s0ke haath Beebe te) «bales HAs ek 189
188s Walliotoospore punctate... ..4s45..a5s5+s-- 120. Oc. nebraskense
[SS Vi aol Oospore spirally ribbed? 2: c.cchs betes Senin a sn cake es 194
Peace Wotlk OhroGsporeySmMOOtliazd . \ts eat. Mer ees fs Shere rset ea hoes os 197
Spines more than 5u in length......... 124a. Oe. echinospermum var. horridum
SrmesMessnbacanenupimmlen ora Nen uk Aes. kl ce deny AM ee oe os 190
OU oulmaltory eel lentarsed seus. sn ctas s oh 122. Oe. hystricinum
190. Suffultory cell not or very slightly enlarged...................... 191
Diameter of vegetative cell 7-l3yu................. 121. Oe. aster
Diameter of vegetative cell 12-l6u................ 125. Oe. pungens
Diameter cmverctative.cell 17-30w... 0) 26 2. Shoe bw he ee ne ds 192
192. Diameter of oogonium 36-38u...123b. Oe. hystrix var. subglobosum
192 eDiametenohoozonitim, s8-O0uls. 2.2 ...4) 8 ee ee 193
WesporemIGOOSGwees ee bac ee eS. oo ED Oe 124. Oe. echinospermum
@aspucetellipsoides a-hole red nwiatee desc 123. Oe. hystrix
eee nil bomvece lvenlaneed’ -)2) je... eet ocr ak FUR ees Os 195
aS oil corvecell motenlareed. 4 0)... 4 1 debies aeOee eee ae 196
Oogonium 40-44y in diameter..................... 126. Oe. exospirale
Oogonium)ds1—60e imidiameter .2...,...2.....25.5: 127. Oe. illinoisense
196. Diameter of oospore 37-45u..... 128a. Oe. spirale var. acutum
196. Diameter of oospore 46-56u................. 128. Oe. spirale
WEcpoie aos uo subslo Waser = ..).2 221... Sal Sea eek ea. 198
Oppo re semaaotlar-ellipsoid ty en cc.! pe erties, De ee Ee 200
Waspake votes .. i515 552). NoRs. OS 132b. Oe. braunii var. zehneri
198. Vegetative cell 8-9u in diameter............ 129. Oe. depressum
198. Vegetative cell 9-12u in diameter........... 130. Oc. semiapertum
IGS we Vieretative, cell 2-23 nam diameter... ..d1.0. s4eeesees cos sks. o- 199
Diameter of oogonium 23-30p......... 132a. Oe. braunii var. hafniense
Diameter of oogonium 30=37w..)..........---...<- 132. Oe. brauni
Diameter of oogonium 43-48y...............5..... 131. Oe. gallicum
Daameter of oogontum 49-52p-... ee ea ood 133. Oe. flavescens
200. Diameter of oogonium 19-30y...135a. Oe. sexangulare var. angulosum
200. Diameter of oogonium 29-33u......0........ 135. Oc. sexangulare
200. Diameter of oogonium 36—42u...135b. Oe. sexangulare var. majus
Masporeqvall punctate. .-)55.92-54 secs. ae ee. 120. Oe. nebraskense
Oospore wall spirally ribbed..........128b. Oe. spirale var. latviense
@aspore wall smooths. o.oo. se oa ot 143a. Oe. multisporum var. magnum
Mocmoareawell COMINAte, AG... bons ead paelea eae 134. Oe. manschuricum
rete DOLE WAMU STOOGES er). o..04 sola osie a RI k ba as ok ben 203
me Oospore walbdentates. 6 ois. 5.5 ea 136. Oc. stellatum f
202. Oospore wall spirally ribbed... .128b. Oe. spirale var. latviense
“ese AQESICU TENE UL arse) niiha ar (aie ena eres ea Sennen Le we gt aed ee ae 215
02. Oospore wall jengitudanally ribbed... :2.. 6080. Wave os ho.. one 218
Pee SOLE Wa lnplnbeGnot oe tr ier te ae eRe On oe oes”: 225
*See footnote, page 53.
62
203.
203.
205.
205.
207.
207.
209.
209.
211.
211.
213.
213.
215.
215.
217.
yA
217.
219.
219.
219.
221.
221.
223.
223.
225.
225.
225.
227.
227.
THE OFDOGONTACE AE
Sultulitory cell enlarged: Sai. acacia One eee eae eee 204
Suitultorycellinot enlarzedtaea ace acter eres ee noe nena: eee 207-
2042) Diameter oF oogoniumils5-O0 uae nae ee eee tee 205
204. Diameter of oogonium 53-60u...138a. Oe. borisianum var. westit
204.5 Diameter ofoogoniumilG5-S0uien.as toes een Oe 206
Vegetative cell 12-15) XSG0-120 05. eee ee ee eee 137. Oe. silvaticum
Vegetative cell 15-23’ X 45-150uge.......5.....5... 138. Oe. borisianum
206. Suffultory cell 26-40u in diameter........... 139. Oe. alternans
206. Suffultory cell about 44u in diameter........ 140. Oe. kitute
Diameteriok vecetativercell 10-2004. eee nee ae ee 208
Diameter of vesetativie:cell?21—A0w..2. 2 85 ee se aes oe ee eee 210
208. Oogonium 24-35u in diameter............... 143. Oe. multisporum
2083 ‘Oogoniumisos—ouanidiameterss-ce oe ae eee eee 209
Oospore slo bOSesmee een acinne ee a ame 144. Oe. irregulare
Oospore depressed-globose..... 0... =... 144a. Oe. irregulare var. condensatum
210% “Diameteror oozonitims9-COus ae acaene sie eee eee 211
210. Diameter of oogonium 65-80u............... 139. O6e. alternans
Vegetativeicell l—3)idiametersilone-...41. sence eee eee eee 212
Vegetative cell 3-6 diameters long? 2... cae eile ere tee eee 214
2125 Oospore not falling oogonimm's. 4. eee eee 141. O8e. victoriense
212°, ‘Oospore nearly or quite fille oogonium=...---s-se ee eee 213
Oogonium 39-54 X 42-65u........... 142a. Oe. crassiusculum var. ‘arechavalete
Oogonium 55-60 X 60-75u........... 142c. Oe. crassiusculum var. cataractum
2I4e AGynandrosporouss. 1... scan One aoe 142. Oe. crassiusculum
214. Idioandrosporous........ 142b. Oe. crassiusculum v var. idioandros porum
Spines arranged: spirally’ . «mcs e.g cs «alehneliee acoso re oe ae eae 216
Spines not arranged spiralliyaccunesece eens ae eee eee 217
216. Diameter of antheridium 6-9n. .1386. Oc. stellatum
216. Diameter of antheridium 9-10p. 145a. Oe. donnellii var. wittrockiana
216. Diameter of antheridium 14-l5y............. 145. Oc. donnelli
Diameter ofooconium: 29-scou..- cae cele ieee 146. Oc. armigerum
Diameter of oozonitmiso—oOle.. 425-6 eee ene 147. O68. echinatum
Diameter or ooronium 46—-o71. 4.555 seer 148. O8ce. lindmanianum
Z18-eRAbSa6—2odn nium bene. eee oon BME cn ace Tuer 219
218. GRibs25—40in number... css Govan eR or Se eee 223
Oogonium 45-50u in diameter......... 149a. Oe. cyathigerum f. americanum
Oogoniumi4s=6o nq inidiameters. 4... odes deacons Geen ne eee 220
Oogonium 65-81y in diameter......... 149c. Oe. cyathigerum f. perfectum
220. Oospore usually completely filling oogonium...................... 221
220. Oospore incompletely filling oogonium, ‘
149d. Oe. cyathigerum var. ellipticum
Dwart male4/—o8uin length. [oe sere bee oe ee ee Oe eee 222
Dwarf male 60—75u in length.......... 149b. Oe. cyathigerum f. ornatum
222. Diameter of oogonium 48-57y.149e. Oe. cyathigerum var. hormosporum
222. Diameter of oogonium 5/—66u............... 149. Oe. cyathigerum
Ribsienenttlate.~.cc ee oe e eeee 150a. Oe. wolleanum var. concinnum
Rabsvenitine acy 2905 A 3 store scueciolas oeroerae lS TO eae ee Ne: ee 224
Pp IRN OK Pays) elanbhanlOYSean5ocuunanedescancGonce 150. Oc. wolleanum
224. Ribs 35-40 in number........... 150b. Oe. wolleanum f. insigne
Pits more or less in longitudinal rows............. 151. Oe. concatenatum
Pits not in longitudinal rows........ 15la. Oe. concatenatum f. hutchinsie
Pits in vertical and transverse rows.151b. Oe. concatenatum var. rectangulare
226: Oosporetibbed)...52.. ..anec eee ee 152. Oe. hunt
220 OOsSporerechinate a4. ee ea eee sOe ee 153. Oe. hispidum
226. “@ospore: dentatesis ca.n6 cca ieees be ene 227
Oogonitumit/7—60_ x 48-0355. eee ee eee 154. Oc. cleveanum
Oogonium 39-46u X 40-47u............ 154a. Oe. cleveanum f. exoticum
228% Division ooogzonium median epereace eee eee oon eee 229
228... Division of oosonitim supramedian=e shee eee eee eee 233
228. Division of OOgOnitim intramediansers.s- eee eee ener 236
228: Division of OO goniumisipentOne= ane nee eee eee eer rr 240
228. . Division of oogonium"suprenie}.. 24st fate oe ee ee ee 261
tSome forms of Oe. ciliatum may be sought here.
229.
229.
231.
231.
231.
231.
231.
231.
231.
233.
233.
235.
235.
237.
237.
239.
239.
241.
241.
243.
243.
245.
245.
247.
247.
249.
249.
249.
251.
251.
OEDOGONIUM 63
Ooconmmponeuiucinalllliyyolicatesa. ti. son 1c 2 lee Saale ee Dl baie hems a 230
Ooconim mnotoneitudinaliyiplicatey.s.22 0: eesti. cose ee Weekes os 231
230. Diameter of oogonium 16-18u...233a. Oe. crenulatum var. gracilius*
230.° Diameter of oogonium 25-27yu............... 233. Oc. crenulatum*
Diameter of oogonium 13-16yu..................... 168. O6c. longicolle
Diameter of oogonium 16-20u......... 168a. Oe. longicolle var. senegalense
Diameter.otoogonium 21—26u. <)...2n.caadese ss 169. Oe. rothi
DicinCtCMmOmOOR OMIM ali rane cet eee es Sale OOS e ei aol ees 232
Diameterof oogonium 80-380.......02..5..5..2.25- 171. Oc. decipiens
Diameter of oogonium 39-46yu...................-. 172. Oe. macrospermum
Diameter of oogonium 89-l0Op.> 22.2... 0.56... ee 162. Oe. perspicuum
232. (Gynandrosporous............:.
232.
.171c. Oe. decipiens var. bernardense
lidioandrosporotises aq se = eee 171b. Oe. decipiens var. africanum
Ooconitumywith verticillatefoldss5.scc0s ciaslse eee hans fone melons dee 234
Ooromumawithoutvertiedlatetolds.,....:.20 22 .1cs8s 2) uss eet eee 235
234. Diameter of oogonium 23-28y..:.-.......... 229. O6c. plicatulum*
234. Diameter of oogonium 50-55u............... 173. O6c. costatum
234. Diameter of oogonium 58-65u............... 174. Oe. boreale
Vegetative cell 4-7u in diameter.................. 170. O8c. danicum
Vegetative cell 13-24 in diameter................ 175. Oc. mirandrium
Ue MOUC CMM ADIGE... 1)lac acute oe bee pene Seno cats wehbe ks as a Seas 237
250- eOOSOMTIM NO pPlicates.c.cas asses Bose 176. Oc. contortum
SLE aBiili Rovigie Gell eal etetars koe wee a een eUNy, EY ce ROL Lh Oe a RP 238
RnR eel! MOMeMIALCCE oc nc. <2 Ses pas ad'y os Ae Ra eedes, oh bs GELS A 239
238. Diameter of oogonium 28-26u............... 232. Oc. pulchrum*
238. Diameter of oogonium 28-32u...167b. Oe. platygynum var. continuum
Qogenuim 16—73u in diameter... . 0.2... eas see 230. Oc. lagerstedtir*
Ooronium 25-29 en diameter. 5... ces. .:.. . meee 231. Oc. uleanum*
BA) See © OSPOLEEW AU GSIN OO LINN eh aiiaita ccc eles ta's < FAIRE ea de ey nt Re ieee elas 241
2AOe sOospore wall pittediass oc acusicehsclsls este one etre 177. Oe. schmidlei
240: Oospore wall echinate. 655..02.5. 0055 ce8: 212. Oc. velatum*
PA ee Oosporenwalliscnopiculates. spate s.ccc awe eels emcee = 258
Vegetative cell 83-8u in diameter.............. Fs SI Sle Cars Os Oe 242
Mexetative.celliS—o2ustmyaiameter...< 66.5 dees sisrdbnnne serene Gees wed won 245
22 Diameter, of OOgOmImML4 D0 py. ioe. o 2 sae, sah sos ei oeta ns ae elaesc 243
242. Diameter of oogonium 19-23y...179b. Oe. rugulosum f. rotundatum
Ocsporesl5—20n ini len oth yr. loko otale ava dissa SMe meee ook Lela Eee Cee 244
Wospore 19—-25pcndlensth. 4.05 65.265 laa ve eas 179. Oe. rugulosum
244. Oogonium ovoid to ellipsoid................ 178. Oe. longatum
244. Oogonium obovoid to ovoid-ellipsoid,
179a. Oe. rugulosum f£. minutum
@psporeesloboseyonsubelObOSe keane seen en ns, SI ts wee 246
Waspareciipsoid or Subellipsoid.. F200 6 case asc scans dees oes. sb asi 253
Peet LOI mee IN eOIALO CMs te. cn aGe oe olticls nis MEMEO eee lA aa eh wa ok 247
re pesuiutliatya Cell dot enlareed. 2 .icnn.cos = - eAas AA ads wade eee at 248
Diameter of vegetative cell 9-1l5u................. 180. O6e. hians
Diameter of vegetative cell 18-20u................ 175. Oc. mirandrium
248. Vegetative cell 34 to 24% diameters long....................0.00:- 249
248. Vegetative cell 2 to 3 diameters long, ;
184e. Oe. macrandrium var. hohenackerit
248. Vegetative cell 214 to 6 diameters long...................2.00005- 250
248. Vegetative cell 6 to 14 diameters long....... 181. O8c. hoersholmiense
Diameter of vegetative cell 12-14u................ 182. Oc. laetevirens
Diameter of vegetative cell 13-2lu....184c. Oe. macrandrium f£. lundense
Diameter of vegetative cell 21-29u................ 183. Oe. pluviale
2M) ee VEN PLO OOF OMIT DS —A4 in cols arcs aceh ovens die ep aific sb aiele ose biol ebeee os 251
ZOO emsene piso OOSONIMT 44—DOfb- ov. «6 ore siers cio ceils Seine ss man ee 252
Oogonium usually single or in two’s...184d. Oe. macrandriumvar. propinquum
Oogonium usually in groups of 2 to 6..184b. Oe. macrandrium f. aemulans
Be MOOSPOLe ol —Oieee GOA. = 5 Sica sx oo asi «ing Sa 184. Oe.
macrandrium
252. Oospore 35-40 X 36-45y........ 184a. Oe. macrandrium £. acuminatum
*See footnote, page 53.
64
253.
253.
255.
255.
255.
257.
257.
259.
259.
261.
261.
263.
263.
265.
265.
267.
267.
269.
269.
res Of DOG ONACE EAD
Diameter of vegetative cell 7-I2u................. 181. Oc. hoersholmiense
Diametenonaecetativie Cel lel4— 32 amt mie set tess en earns 254
2545" Menminailicell’setitorme.... sons ses ol Son Oemcianim
D254 herminalkcell notiseuttonmasse nee oe cn ec ere 255
Diameter OMOOSpOLeLZI—O2 Un eee tine aries 207. Oc. flexuosum*
Diameterok OoSporeie2=420." ay aon olen ae eer One ere ree 256
Diameter of oospore 41-4802 a= eee eee ate 186. Oc. spectabile
256. ) Viezetauiviercells7¢ to) 3) diameters ong ans ary eee ee eee Zo
256. Vegetative cell 3 to 5 diameters lhevaker ee 3 187. Oc. implexum
Oozconium: clobese-obovoidee aaa aes ee 208. Oe. fonticola*
Oogonium subglobose. . Sacooogaano slits, (Oke. yolnaualle
258. Diameter of oogonium 30- 39u. Fe cincad sie ead ood in: CO en 259
258 a DiameteromooZonitime40—o0 Lj eeies ee aise ena eee eee 260
258. Diameter of oogonium 56-68u...188b. Oe. monile var. eminens
Swrucgbilivonay, Cellll qnbiaawGl ace occ asskaaconsounssaues 188. Oc. monile
Suffultory cell not tumid.......:. 184f. Oe. macrandrium var. scrobiculatum
260. Suffultory cell 27—28u in diameter.188c. Oe. monile f. victoriense
260. Suffultory cell 35-884 in diameter.188a. Oe. monile f. borgei
Oosporezwall’smooth Gos. sak Ao igs ORES Ce EET are 262
Oospore wall longitudinally ribbed! 225.422 e oe eae 264
262. Diameter of oogonium 30-86y.....:......... 181. Oc. hoersholmiense
2625 Diameter Or ooconitims 42-5511 sn seers eens yarn ae ea 263
262. Diameter of oogonium 55-58u...189a. Oe. obtruncatum var. completum
Wenethomoozoniumipb—-O8u-e sae eee ee 189. Oe. obtruncatum
Length of oogonium 68-75y...... 189b. Oe. obtruncatum var. ellipsoideum
264, Ribs M-l/anmumbers... - 195b. Oe. acrosporum var. bathmidosporum
264%) JRibst23—380)dnlaamalbberye cfr acrec sa casts cle ce Oe ae eee nae eine 265
2645) .Rabs40—45 sin numbers. os. ae 193. Oc. tentoriale
Vegetative cell 7-8u in diameter...... 195c. Oe. acrosporum var. floridense
Veretatnvercelllol2—2ilsinrdianm' eters sacs err eee eee 266
266. Plant usually less than 10-celled.195a. Oe. acrosporum f. boreale
266s eblantusuallly amonresinanel {Celle clearness reer eae 267
Diameter Ofoogonium) Jo-48u.- aes eei 195. Oe. acrosporum
Diameter of oogonium 44-56u.........195d. Oe. acrosporum var. majusculum
268; (Oospore wall smoothies hele eee ee ee eee 269
268. Oospore wall punctate.......... 4lce. Oe. fabulosum var. punctatum
Vegetative cell 56-70u in diameter.... 41b. Oe. fabulosum var. columbianum
Vecetativercelle/0-93 ul inndiametery see: sem cic eee ee ioe tee 270
ZO @ospore globose tovellipsoideee ener eer 41. Oe. fabulosum
270. Oospore subglobose to subcylindrical,
41a. Oe. fabulosum var. maximum
*See footnote, page 53.
OEDOGONIUM 65
1. Oc. laeve Wittrock.
(Pl. XI, fig. 100.)
1874, p. 8; De Toni 1889, p. 35; Hirn 1900, p. 75.
Monoecious; oogonium single,* depressed-globose, pore median;
oospore depressed-globose, filling oogonium, spore wall smooth; anther-
idium in groups of 1—2,* subepigynous, sperm 1; vegetative cell 10-14
20-70u; oogonium 32-38 X 24-30; oospore 30-35 X 23-26u; antheridium
9-10 X9-13y.
United States: Illinois, Michigan; France.
Originally distributed from France, the species was found
subsequently in Illinois and Michigan (Transeau), and the
above description is made from the American material. The
large oogonium in relation to the diameter of the vegetative
cell and the depressed-globose oospores are chief characteristics.
t is clearly separated from Oe. curvum, in addition, by the
absence of any marked tendency toward irregularly curved
filaments.
2. Oe. curvum Pringsheim.
(Pl. XI, figs. 103 and 104.)
1858, p. 69, Pl. 5, fig. 3; Hirn 1900, p.'74, Pl. I, fig. 3; Tiffany 1926, p. 99, Pl. III,
figs. 25-27.
Monoecious; oogonium 1—6, depressed globose, pore median; oospore
depressed-globose, filling or not filling oogonium, spore wall smooth;
antheridium 1-7, sperm 1; basal cell elongate; filament usually irregularly
curved; vegetative cells 5-10X10-40u; oogonium 21-25 18-24y;
oospore 19-23 X 14-19; antheridium 6-9 X6—9un.
United States: Iowa, Alabama; Germany, Spain, Sweden.
This species is to be compared with Oe. cryptoporum below.
The irregularly curved filaments, particularly in the region of
the antheridia, are usually characteristic. The pore is some-
times a little above the median position. :
3. Oe. cryptoporum Wittrock.
(Pl. XI, fig. 101.)
1870, p. 119; Hirn 1900, p. 72, Pl. I, fig. 1; P. B. A. No. 1525.
Monoecious; oogonium 1, subdepressed-obovoid-globose or sub-
depressed-globose, pore median; oospore subdepressed-globose, quite
filling oogonium, spore wall smooth; antheridium 1-7, scattered or
subhypogynous or subepigynous; sperm 1; vegetative cell 7--10x*
28-60u; oogonium 23-28 X 26-314; oospore 22-27 X 19-21u; antheridium
6-3 7-l 1p.
United States: Utah; Austria, Denmark, Norway, Sweden.
*Hereafter a numeral (or numerals) only will indicate the number of oogonia
and antheridia; thus l=a single oogonium or antheridium and 2-7 means that
oogonia (or antheridia) may occur in groups of from two to seven seriate individ-
uals. The same applies to androsporangia.
66 THe 10.EDO:COINWACCE AGE
3a. Var. vulgare Wittrock.
(Pl. XI, fig. 102.)
1874, p. 7; Wolle 1887, p. 70, Pl. 74, figs. 1 and 2; Oe. cryptoporum Wittr. in Hirn
1896, p. 2; Hirn 1900, p. 73, Pl. I, fig. 2; (?) Oe. spetsbergense Wittr. 1874, p. 37 and
mm Hirn 1900, p. 316, Pl. L; fig."322.
Smaller; oogonium 1-5; vegetative cell 5-815-48u; oogonium
18-25 X 18-26; oospore 16—-23X15-19y; antheridium 5-7 X9-12u.
United States: New Jersey, Michigan, Illinois, Massa-
chusetts, Pennsylvania, Utah; Australia; Ko Chang; Ceylon;
Austria, England, France, Germany, Italy, Spain, Norway,
Sweden.
The variety is much more widely distributed and has
smaller vegetative cells and shorter oogonia than the species.
The small sized filaments with rather depressed-globose oogonia
are characteristic.
4. Oe. rufescens Wittrock.
(Pl. XI, fig. 105.)
1870, p. 134; 1874, p. 32; Hirn 1900, p. 76, Pl. I, fig. 4; Collins 1909, p. 229;
PY Becae Noe o2i:
Dioecious, macrandrous; oogonium 1-8, obovoid- or depressed-
obovoid-globose, pore median, rimiform; oospore globose or depressed-
globose, filling oogonium or nearly so, spore wall smooth; antheridium
to 12-seriate; sperm 1; female vegetative cell 8-10X34~-70u, male
7-9 X30-54u; oogonium 22-2422-30u; oospore 21-23X17-22n;
antheridium 6-8 X8-12u.
United States: Connecticut, Rhode Island, Michigan, [lli-
nois, Alabama, Ohio; Austria, Denmark, England, Germany,
' Sweden, Latvia; South Africa.
4a. Var. exiguum (Elfving) Tiffany nov. comb.
(Pl. XI, fig. 106.)
Oe. rufescens f. exiguum (Elfv.) Hirn 1900, p. 76, Pl. 1, fig. 5; Oe. exiguum Elfv.
in Hirn 1895, p. 19.
Vegetative cells a little smaller; oospore subdepressed-globose;
antheridium 3; vegetative cell 5-9 22-88; oogonium 22—24 x 20-28y;
oospore 20-22 17—-23u; antheridium 5X 10-12u.
United States: Illinois, Alabama, MiQussissippi; Finland,
France; Southern Tibet.
’ 4b. Var. lundellii (Wittrock) Tiffany.
(Pl. XI, fig. 107.)
1929, p. 75; Oe. Lundellii Wittr. 1874, p. 32; Oe. Rothit Breb. in Rabenh. Alg.
Eur. No. 1374, 1862; Oe. rufescens Wittr. subsp. Lundellii (Wittr.) Hirn 1900, p. 77,
Pl. I, fig. 6; Oe. rufescens Wittr. subsp. Lundellii (Wittr.) Hirn f. elongatum Hirn
1900, p. 78, Pl. I, fig. 8; P. B. A. No. 1428.
Vegetative cells wider in proportion to oogonium than in type;
oogonium depressed-globose; vegetative cell 8-1230-75yu; oogonium
22-25 X 21-27; oospore 19-23 15-22u; antheridium 7-9 X6-12y.
OEDOGONIUM 67
United States: Maine, California; Austria, England, Fin-
land, France, Germany, Hungary, Sweden.
The species and the varieties resemble Oe. cryptoporum
(No. 3) except in their dioecious habit and are separated from
each other chiefly on the basis of relative dimensions. The
varieties are so widely distributed and so uniformly separable
from the species that they must be regarded as distinct even
though similar.
5. Oe. calcareum Cleve.
(Pl. XI, fig. 108.)
In Wittrock 1870, p. 185; (?) Vesiculifera compressa Hassall 1845, p. 204, P1. 53,
fig. 4; Hirn 1900, p. 78, Pl. I, fig. 9.
Dioecious, macrandrous; oogonium | or rarely 2, depressed-globose,
with median pore; oospore depressed-globose, filling oogonium, wall
smooth; ileal ae to 8-seriate; sperm 1; vegetative cell 11-14X
22-56u; oogonium 27-30 X 21-23; oospore 26- 28 X 20-21; antheridium
iI 9— [2p
England, Denmark, Sweden, Latvia; South Africa.
The filaments of this species are often incrusted with lime.
The depressed-globose oospore completely filling the oogonium
and the robust appearance of the short-celled vegetative
filaments are characteristic.
6. Oece. sociale Wittrock.
(Pl. XI, fig. 109.)
In Wittr. & Nordst. Alg. Exs. No. 401, 1882; Oe. ochroleucum Kuetz. in Rabenh.
Alg. Eur. No. 1280, 1862; Hirn 1900, p. 79, Pl. II, fig. 12.
Dioecious, macrandrous; oogonium 1, subglobose, pore median;
oospore globose (or subglobose), quite filling oogonium, cell wall smooth;
antheridium 1-5, sperms 2 division horizontal; vegetative cell 9- 16X
30-1304; oogonium 30-38 X33- AQu; oospore (26—) 28-35 X 28-35p;
antheridium 12-148-1luy.
United States: Illinois, Alabama, Mi§ssissippi; British
Columbia; Austria, Germany, Sweden, Latvia; India, Tibet,
Burma. |
The oospore is usually quite globose. It is easily separable
from its dioecious relatives by its larger size and by the
presence of two sperms in the antheridium.
7. Oe. cymatosporum Wittrock and Nordstedt.
(Pl. XII, figs. 112 and 113.)
In Wittr. 1870, p. 121; Oe. Magnusii Wittr. in Hirn 1895, p. 11; Hirn 1900, p. 80,
IPA THIS reife als
Monoecious; oogonium 1 or rarely 2, subdepressed-globose, pore
median, rimiform; oospore depressed-globose, filling or not filling
oogonium, spore wall of three layers: oute. smooth, middle scrobiculate,
Cee
68 THE OEEDOGONIMVCEAE
inner smooth; antheridium 1-4, subepigynous, subhypogynous,
hypogynous, or scattered; sperm 1; vegetative cell 8-19X32-70n;
oogonium 30-40 27—40u; oospore 27-35 X 22-33y; antheridium 7-10
9=1dp:
United States: Massachusetts, Mississippi; Austria, England,
Finland, France, Hungary, Sweden.
This species resembles Oe. magnusit below from which it
is distinguished by its monoecious habit, its larger oogonia,
and its oospores not usually filling the oogonia.
8. Oe. magnusii Wittrock.
(Pl. XII, fig. 115.)
1874, p. 38; Hirn 1900, p. 81, Pl. II, fig. 14; Wittr. and Nordst. Alg. Ex. No. 109.
Dioecious, macrandrous (perhaps monoecious also); oogonium
1-3, depressed-globose, pore median, rimiform; oospore depressed-
globose, quite filling oogonium, spore wall of three layers: outer layer
smooth, middle layer scrobiculate, inner layer smooth; antheridium
to 8-seriate, sperm 1; vegetative cell 7-10X 12—40u; oogonium 24-27 X
21-264; oospore 22-25 X 18-23y; antheridium 8-10X5-1 1x.
United States: Illinois, Michigan, Massachusetts; British
Columbia; Finland, Germany, Sweden.
Easily separable from Oe. cymatosporum (No.7). According
to Wittrock it is sometimes monoecious.
9 Oe. suecicum Wittrock.
(Pl. XII, fig. 116.)
1872, p. 5; 1874, p. 30; West 1891, p. 109, Pl. 18, fig. 2; (?) Oe. trichosporum
Itzig. in Rabenh. 1868, p. 426; Hirn 1900, p. 82, Pl. II, fig. 15; Collins 1909, p. 230;
Heering 1914, p. 198, fig. 281; Tiffany 1926, p. 89, Pl. V, figs. 57 and 58.
Dioecious, macrandrous; oogonium 1, subglobose, pore median;
oospore globose, nearly filling oogonium, outer spore wall echinate, inner
smooth; antheridium 2-6, sperm 1; basal cell elongate; terminal cell
apically obtuse; vegetative cell 9-14 X 30-90; oogonium 32-38 XK 34-41;
oospore 30-37 X30-37y; antheridium 10-12 X 13-17.
United States: Iowa, Illinois, Massachusetts; Australia;
Austria, Denmark, Finland, France, Germany, Latvia, Iceland,
Norway, Sweden; British Columbia; South Africa.
Qa. Form australe G. S. West.
i (Pl. XII, fig. 117.)
1909, p. 45, fig. 6 E.
Vegetative cell somewhat larger; spines larger and moré sparse;
vegetative cell 14-16X56-80y4; oogonium 40-41 40-414; oospore
(without spines) 31-33 X31-33u.
Africa: Yan Yean Reservoir, Victoria.
The species and the variety constitute the only dioecious
macrandrous members of the genus having echinate oospores.
OED OGONELUM~ ; 69
10. Oe. varians Wittrock and Lundell.
(Pl. XII, fig. 120.)
In Wittr. 1874, p. 11; Oe. polymorphum Wolle 1887, p. 73, Pl. LXXIV, figs.
16-19; Hirn 1900, p. 89, Pl. IV, fig. 23; Collins 1909, p. 232; Heering 1914, p. 206,
fig. 298; Tiffany 1926, p. 99, Pl. VII, figs. 75 and 76.
Monoecious, (or sometimes dioecious); oogonium 1, or rarely more,
depressed- or subdepressed-pyriform-globose, pore nearly superior;
oospore globose, not filling oogonium, spore wall smooth; antheridium
to 9-seriate, scattered; sperms 2, division horizontal; basal cell elongate;
terminal cell apically obtuse; vegetative cell 12-16 35-144y; oogonium
34-50 X 34-55; oospore 31-41 X30-41y4; antheridium 11-15X5-7uy.
United States: Iowa, New Jersey, Illinois; Patagonia;
Austria, Finland, Sweden; South Africa.
The typical plants of this species have a nearly superior
pore, and the oospore usually does not fill the irregularly
shaped oogonium. Transeau has observed both dioecious and
monoecious forms from Illinois. -(See also Hirn Joc. cit.).
11. Oc. urbicum Wittrock.
(Pl. XII, figs. 118 and 119.)
1874, 13; Oe. tumidulum Pringsh. 1855, p. 158, Pl. 1, figs. 26 and 27; Hirn
1900, p. or. Pl. V, fig. 26.
Monoecious; oogonium 1, ellipsoid-globose, pore a little above
median or nearly superior; oospore globose, not filling oogonium, spore
wall smooth; antheridium few celled; sperms 2, division horizontal;
vegetative cell 15-19X40-110u; oogonium 46-55 X58-63u; oospore
33-46 X 33-46u; antheridium 14-16 5-7u.
Germany.
In general appearance this species is similar to Oe. varians
above and Oe. tyrolicum (No. 14). It is distinguished from the
former by its size and tendency toward ellipsoid oogonia;
from both by the variable position of the pore.
12. Oe. obsoletum Wittrock.
(PI. XII, fig. 121.)
1874, p. 9; Oe. vernale Wittr. 1872, p. 1; Hirn 1900, p. 83, Pl. II, fig. 16.
Monoecious; oogonium 1, subglobose or subdepressed-globose, pore
a little above supramedian; oospore subdepressed-globose, not filling
oogonium, spore wall smooth; antheridium 1-3, subepigynous; sperm 1;
vegetative cell 9-15X30-75u; oogonium 34-39X34-438u; oospore
30-34 & 28-32u; antheridium 8—9X 12—16uy.
United States: Pennsylvania; England, Sweden.
Similar to Oe. plusiosporum below and distinguished from
it by the usually depressed-globose appearance of the oospore.
The oospore of Oe. plusiosporum is more regularly globose and
its oogonium is more nearly ellipsoid.
70 Prk OEDOGONTEACE LE
13. Oe. plusiosporum Wittrock.
(Pl. XII, fig. 122.)
1874, p. 11; Wolle 1887, p. 72, Pl. 74, figs. 20 and 21; Hirn 1900, p. 84, Pl. II,
fig. 17.
Monoecious; oogonium 1, subglobose or subellipsoid-globose, with
pore a little above median; oospore globose, rarely subglobose, not quite
filling oogonium, spore wall smooth; antheridium to 6-seriate; sperm
(?) 1; terminal cell obtuse; vegetative cell 12-1924—-77u; oogonium
(28-) 34-45 X 35-50; oospore (25—) 80-39 X 30-39; antheridium 12-14
<8-12u.
United States: Pennsylvania, New Jersey, California; Colum-
bia; British Columbia; Sweden, Finland, Rumania.
See Oe. obsoletum above.
14. Oe. tyrolicum Wittrock.
(Pl. XII, fig. 123.)
1874, p. 12; Hirn 1900, p. 91, Pl. IV, fig. 25; Heering 1914, p. 206, fig. 299; Collins
1918, p. 65; Tiffany 1926, p. 99, Pl. VII, fig. 77.
Monoecious; oogonium 1 (rarely 2), ellipsoid-globose or occasionally
obovoid, pore nearly superior; oospore usually globose, not filling
oogonium, spore wall smooth; antheridium 1-4; sperms 2, division
horizontal; basal cell elongate; terminal cell apically obtuse; vegetative
cell 15-24 & 45—-120u; oogonium 45-53 & 57—70u; oospore 40-48 XK 40-48y;
antheridium 12-21 9-11y.
United States: Massachusetts, Iowa; Austria.
Distinguished by its more nearly ellipsoid oogonia and
globose oospores. Separated from Oe. varians (No. 10) by its
larger dimensions and from Oe. cardiacum var. carbonicum
(No. 15c) by its monoecious habit.
15. Oc. cardiacum (Hassall) Wittrock.
(Pl. XIII, figs. 124 and 125.)
Vesiculifera cardiaca Hass. 1845, p. 203, Pl. 51, fig. 4; Oe. cardiacum Wittr.
1870, p. 135; Oe. lautumniarum Wittr. in Hirn 1896, p. 3; (2) Pringsheimia inaequalis
Wood 1872, p. 195, Pl. 18, fig. 1; Hirn 1900, p. 85, Pl. III, fig. 19; Collins 1909, p. 231;
Heering 1914, p. 194, fig. 273; Tiffany 1926, p. 89.
Dioecious, macrandrous; oogonium usually 1, subglobose to sub-
cordiform-globose, with a supramedian pore; oospore globose, not filling
the oogonium, spore wall smooth; antheridium 1-10; sperms 2, division
horizontal; basal cell elongate; terminal cell apically obtuse; female
vegetative cell 18-3060-200u, male 15-25%45-170u; oogonium
48-70 X 58-78; oospore 42-60 X 42-60u; antheridium 15-21 10-14u.
United States: Iowa, Illinois, Pennsylvania, Oregon, Ohio,
Connecticut; Africa; Paraguay; Ontario; Australia; England,
Denmark, Finland, France, Germany, Switzerland, Sweden.
OED O'EO NIU M 71
15a. Form interjectum Hirn.
(Pl. XIII, fig. 127.)
1900, p. 86, Pl. III, fig. 21.
Pore of oogonium more nearly superior than in the type; vegetative
cell 19-29 xX 60-190u; oogonium 45-60 X 63-81; oospore 44-58 & 43-58 u.
England, Sweden.
15b. Form pulchellum (Hassall) Hirn.
(Pl. XIII, fig. 126.)
1900, p. 86, Pl. III, fig. 20; Vesiculifera pulchella Hass. 1845, p. 199, Pl. 50,
HISer oe
Vegetative cell 25-37 X40-125u; oogonium 57-73 X68-78y; oospore
56-66 X 56-66.
England, France.
15c. Var. carbonicum Wittrock.
(Pl. XIII, fig. 128-)
In Wittr. and Nordst. Exs. 1883; Oe. carbonicum Wittr. 1874, p. 33; Hirn 1900,
p. 87, Pl. IV, fig. 22; Tiffany 1926, p. 90, Pl. I, fig. 5; P. B. A. No. 1781.
Oogonium 1-2, obovoid to globose-ovoid, pore nearly superior;
oospore obovoid-ellipsoid to globose-ellipsoid; female vegetative cell
14-30 X40-200u, male 14-25x40-150u; oogonium 42-56 50-80y;
oospore 40-52 X 46-65; antheridium 13-20 X 12-15n.
United States: Iowa, Illinois, Ohio; Austria, England,
Denmark, Germany, Sweden.
15d. Var. minus Lemmermann.
(Pl. XIII, fig. 129.)
1909, p. 191, as v. minor; Heering 1914, p. 194; Tiffany 1926, p. 90, Pl. I, fig. 8.
Oogonium and oospore smaller; female vegetative cell 16-28
25-754, male 14-23X25-75u4; oogonitum 30-45X35-50u; oospore
28-42 X 28—40u; antheridium 12- 15 5" —6u.
United States: Iowa, Kentucky; Germany.
The ‘‘cardiacum’”’ group is rather variable, and the varieties
are not always clearly separated. The differentiating characters
used in the key are those including shape and size of oospore
and relative lengths of vegetative cells. Upon these bases the
divisions above seem tenable. See also Oe. glabrum (No. 17).
16. Oe. franklinianum Wittrock.
(Pl. XIII, fig. 131.)
In Wittr. and Nordst. Alg. Exs. No. 309, 1880; Wolle 1887, p. 89, figs. 7-9
Hirn 1900, p. 88, Pl. II, fig. 18; Collins 1909, p. 231; ae 1914, p. 194; Tiffany
1926, p. 89, Pl. IV, figs. 43-44.
Dioecious, macrandrous; oogonium 1, subglobose, with a supra-
median pore; oospore globose, almost filling oogonium, spore wall
42 T EO EDO:E ON DAGIE AGE
smooth; antheridium 1—4; sperms 2, division horizontal; female vege-
tative cell 9-12 X 30—95u, male 8-10 X 25—90u; oogonium 26-31 & 29-41;
oospore 24-30 X 24-80u; antheridium 8-9 X 5-7.
United States: Iowa, Illinois, New Jersey, Pennsylvania;
Brazil; Australia.
This species also resembles Oe. cardiacum (No. 15) but is
distinguished by its smaller dimensions throughout.
17. Oe. glabrum Hallas.
(Pl. XIII, fig. 130.)
1905, p. 408, fig. 18; Hirn 1906, p. 14, Pl. I, fig. 2.
Dioecious, macrandrous; oogonium 1 (rarely 2), obovoid, pore
superior; oospore globose or subglobose, not filling oogonium, spore
wall smooth; antheridium 5-8; sperms 2, division vertical; terminal
cell (sometimes the oogonium) broadly apiculate; female vegetative
cell 16-26 X 120—240yu, male 21-25 60-150u; oogonium 56-58 X 63-86y;
oospore 42-49 X 44-63; antheridium 20-22 7—-9u.
Denmark.
This species in general appearance is near the ‘‘cardiacum’
group. Its vertical division of the two sperms, the small
size of its oospore in comparison to the oogonium, and the
uniformly superior pore are characters that identify it and
make it tenable as a species.
’
18. Oc. lautumniarum Wittrock.
(Pl. XIV, figs. 132 and 133.)
In Wittr. and Nordst. Alg. Exs. No. 7, 1877; Hirn 1900, p. 92, Pl. V, fig. 27.
Dioecious, macrandrous; oogonium 1, rarely 2, subobovoid-globose,.
pore a little above median (rarely nearly superior); oospore subglobose,
or sometimes subangular, filling oogonium, wall smooth, rarely thick-
ened; antheridium 1-4; female vegetative cell 16—2240-110u, male
15-20 X 45-1004; oogonium 40-49X45-5lu; oospore 36-46 35-47y;
antheridium 14—17 7-10u.
British Columbia; Finland, Germany, Sweden, Latvia.
This species is separable from the ‘‘cardiacum’’ group
largely by the varying position of the oogonial pore (from
nearly median to nearly superior) and by a combination of
cell sizes and shapes not found in any one of this group.
19. Oe. intermedium Wittrock.
(Pl. XIV, fig. 134.)
In Wittr. and Nordst. Alg. Exs. No. 708, 1886; Oe. fragile Wittr. in zbid. No. 4,
1877; Oe. vaucherii (Le Cl.) Al. Br. in ibid. No. 14, 1877, and in Rabenh. Alg. Eur.
No. 2499, 1877; Hirn 1900, p. 94, Pl. V, fig. 31.
Monoecious; oogonium 1, obovoid to obovoid-globose, pore superior;
oospore globose or obovoid-globose, filling oogonium or nearly so, spore
OEDOGONIUM wo
wall smooth and thick; antheridium 1-4, subepigynous or hypogynous
or rarely scattered, sperms 2, division horizontal; vegetative cell 15-18 x
45-80yu; oogonium 31-37 X 34—45u,; oospore 30-36 X 33-41; antheridium
14-16 X5-10x.
United States: Illinois, Ohio, Mississippi; Austria, Finland,
Sweden, Latvia, Germany; India; Siberia.
19a. Var. fennicum Tiffany.
(Pl. XIV, fig. 135.)
1929, p. 74; Oe. intermedium Wittr. forma valida Hirn 1900, p. 95, Pl. V, fig. 32;
Oe. intermedium Wittr. forma West 1909a, p. 239.
Oogonium and oospore considerably larger; vegetative cell 17-19
50-120u; oogonium 388-4642-60u; oospore 35-4035-40u; anth-
eridium 13-18 X6-8u.
United States: Michigan; Finland; Egypt.
Oe. intermedium resembles Oe. fragile (No. 24) in general
appearance, particularly those specimens that reach the upper
limits of dimensions. It is rather intermediate between Oe.
fragile and Oe. globosum (No. 21). Its size and location of
antheridia are distinctive characters in this monoecious group
with regularly supérior pore. The variety fennicum is larger
and its oogonium is not filled by the oospore.
20. Oe. hirnii Gutwinsk1.
(Pl. XIV, figs. 136 and 137.)
1896, p. 2, Pl. 5, fig. 1; Hirn 1900, p. 93, Pl. V, fig. 29; West and West 1902,
p. 12, Pl. I, fig. 1-3.
Monoecious; oogonium 1, subglobose or subobovoid, with superior
pore; oospore globose, not filling oogonium, spore wall smooth;
antheridium 1-2, subepigynous; sperms 2, division horizontal; vegetative
cell (sometimes slightly capitellate) 8-13 28-80u; oogonium 32-37 xX
32-39u; oospore 28-31 X 28-31u; antheridium 8-11 *4-9un.
Austria, Ireland.
20a. -Var. africanum G. S. West.
(Pl. XIV, fig. 138.)
1907, p. 98; Tiffany 1926, p. 100, Pl. ITI, fig. 24.
Oogonium globose to subglobose; antheridium 1-3; vegetative cell,
broadly capitellate, 13-15 33-60u; oogonium 39-40 38-40; oospore
33-36 X 33-36u; antheridium 13-14 5-6u.
United States: Iowa; Africa.
The species is near Oe. globosum below in description, differing
in its smaller size and its commonly subobovoid oogonia.
The variety africanum is very distinct and is the only poriferous
form in the monoecious group of the genus having broadly
capitellate cells.
74 tae Om pio Ccon fA Cr we
21. Oc. globosum Nordstedt.
(Pl. XIV, fig. 139.)
1878, p. 20, Pl. 2, fig. 16; Hirn 1900, p. 94, Pl. V, fig. 30.
Monoecious; oogonium 1, globose or subglobose, pore superior;
oospore globose, quite filling oogonium, spore wall smooth; antheridium
1-7, subepigynous or subhypogynous or scattered; sperms 2, division
horizontal; basal cell elongate; terminal cell setiform; vegetative cell
10-14 40-954; oogonium 32-40382-46u; oospore 30-387 X28-37y;
antheridium 9-12 4—8u.
United States: Illinois, Massachusetts; Australia; Greece,
Serbia.
The relation of this species to Oe. hirnit (No. 20) and to
Oe. intermedium (No. 19) is discussed under these latter forms.
22. O68. zigzag Cleve.
(Pl. XV, figs. 143 and 144.)
In Wittr. 1870, p. 120; Hirn 1900, p. 101, Pl. VII, fig. 42.
Monoecious; oogonium 1, globose or obovoid-globose, pore superior;
oospore of same form as oogonium and quite filling it, spore wall smooth,
thick; antheridium 1, subepigynous or subhypogynous, alternating with
oogonium and vegetative cell; sperms 2, division horizontal; basal cell
elongate; terminal cell apically obtuse; vegetative cell 15-20 30-80p;
oogonium 45-63 52-63 (—67)u; oospore 43-60 (44—) 48-58 (-63)y;
antheridium 15-19 8—15uy.
Sweden.
The short, few-celled filaments of Oe. zigzag are quite
unmistakable. It bears some resemblance to the dioecious
Oe: alternans (No. 139) and is perhaps closely related to Oe.
curtum (No. 23). From the latter it is distinguished by its
shorter filaments, by its single oogonium, and by its single
antheridium alternating with a vegetative cell.
23. Oe. curtum Wittrock and Lundell.
(Pl. XV, fig. 149.)
In Wittr. 1870, p. 121; Oe. curvum Pringsh. in Roumeguere Alg. Exs. No.
793; Hirn 1900, p. 102, Pl. VI, fig. 41; Skuja 1927, p. 98, Pl. II, fig. 11.
Monoecious; oogonium 1-4, obovoid-globose or subglobose, pore
superior; oospore of same form as oogonium, which it nearly fills, spore
wall smooth, often thick; suffultory cell occasionally larger than
vegetative cell; antheridium 1-4, subepigynous, sometimes terminal;
sperms 2, division horizontal; basal cell elongate; vegetative cell 12-22
25-110; oogonium 38-55 X 37-54; oospore 36-52 X 35-51; antheridium
10-17 X8-l3p.
Finland, Germany, Sweden, Latvia.
Similar to Oe. zigzag (No. 22). Skuja (1927) reports Oe.
curtum with 10-12 cells (and often 20) in a filament. Oe.
OEDO GON LUM
ax
On
zigzag rarely has more than 6-8 cells in the filament. Skuja
(1927) also records the membrane of the vegetative cell as
being spirally punctate.
24. Oc. fragile Wittrock.
(Pl. XV, fig. 145.)
1870, p. 120; 1872a, p. 24; Wolle 1887, p. 71, Pl. 74, figs. 4-6; Oe. Candollei (Le
Cl.) Breb. in Roumeguere Alg. Exs. No. 347; Hirn 1900, p. 96, Pl. V, figs. 33 and 34;
Collins 1909, p. 232, fig. 81; Heering 1914, Pl. IV, fig. 36; P. B. A. No. 1477.
Monoecious; oogonium 1, globose or subobovoid-globose, with
superior pore; oospore globose, filling oogonium, spore wall smooth;
antheridium 1-8; sperms 2, division horizontal; basal cell elongate;
vegetative cell 12-17X50-120u; oogonium 42-5044-55yu; oospore
39-46 X 39—-46u; antheridium 12-15 10—-12u.
United States: Iowa, Illinois, Mississippi, Massachusetts,
Pennsylvania, Michigan; British Columbia; Patagonia; South
Africa; Australia; France, Finland, Sweden, Latvia.
24a. Var. abyssinicum Hirn.
(Pl. XV, fig. 147.)
1900, p. 97, Pl. VI, fig. 35.
Oogonium smaller than the type; antheridium to 6-seriate; veg-
etative cell 12-17 X 25-100; oogonium 38-45 X 40—50y; oospore 36-43 X
36-44; antheridium 11-15x6-14uy.
Africa.
24b. Var. robustum (West and West) Tiffany nov. comb.
(Pl. XV, fig. 146.)
Oe. zigzag Cleve var. robustum West and West 1903, p. 36; zbid. in West 1904,
p. 60, fig. 12B; cbid. in Hirn 1906, p. 24, Pl. I, fig. 3.
Oogonium usually globose; antheridium 2; vegetative cell 19-23
40—90u; oogonium 53-58 X50- 60u; oospore 51— 56X47- ues antheridium
19 5-7.
England.
Oe. fragile is characterized by its usually globose spores
completely filling the oogonia, its size, and monoecious habit.
Cf. Oe. globosum (No. 21) and Oe. intermedium (No. 19). The
variety abyssinicum is more slender and has a larger number
of seriate antheridia than the species. Variety robustum 1s
considerably larger than either. The latter was. originally
described by W. and G. S.- West as a variety of Oe. zigzag
(No. 22). Its pluricellular habit and number of antheridia
place it outside the few-celled zzgzag. Its globose oospore
completely filling the oogonium and its subepigynous and
subhypogynous antheridia are characters that seem nearest to
Oe. fragile.
76 THE (OF Diode ON Ge Ace
25. Oe. vaucherii (Le Clerc) Al. Braun; Wittrock.
(Pl. XV, figs. 150 and 151.)
(2?) Prolifera vaucherii Le Cl. 1817, p. 474, Pl. 23, fig. 4; (?) Oe. vaucheriti Braun
1855, p. 40, Pl. 2, fig. 13; Wittr. 1870, p. 121; (2?) Oe. diandronites Carter 1858, p. 31,
Pl. 3, figs. 8, 9-11; (?) Oe. monandronites Carter 1858, p. 38; Hirn 1900, p. 97, Pl. VI,
fig. 36; Oe. vauchertt (Le Cl.) Al. Br.; Wittr. f. msulare Hirn 1900, p. 99, Pl. VI,
fig. 37; Collins 1909, p. 232; Heering 1914, p. 207, fig. 308; Tiffany 1926, p. 100,
Pi IVG ietoorr eb aeAcwNO@ssliZiaG:
Monoecious; oogonium 1, obovoid to subovoid-globose, pore
superior; oospore globose to subglobose, not filling oogonium, spore
wall smooth and sometimes thick; antheridium 1-4; sperms 2, division
horizontal; basal cell elongate; vegetative cell 20-30 X 32-118; oogonium
40-58 X 45-65; Oospore 35-54 35—-55u; antheridium 17-380 6-L5uy.
United States: Massachusetts, Michigan, Iowa, Illinois,
Ohio, Mississippi; India; Denmark, France, Germany, Switzer-
land, Italy, Sweden, Latvia.
Oe. vaucherii resembles Oe. intermedium (No. 19) and Oe.
fragile (No. 24). Hirn’s f. insulare is not distinct and is included
with the species. The dimensions given above include the
variations observed for the American material.
26. Oe. richterianum Lemmermann.
(Pl. XVI, fig. 156.)
1895, p. 26, figs. 1-3; Oe. paludosum (Hass.) Kuetz. in Hirn 1895, p. 14; Hirn
1900; p. 117, Pl. XII, fig. 63.
Monoecious; oogonium 1-2, obovoid or subellipsoid, pore superior;
oospore subobovoid or subellipsoid (rarely globose-ellipsoid), filling
oogonium or not, spore wall smooth; antheridium 1-6, subhypogynous
or subepigynous or scattered; sperms 2, division horizontal; basal cell
elongate; vegetative cell 12-21 36-1264; oogonium 36-48 X48-74u; _
oospore 35-43 X438-59u; antheridium 12-15 6-10x.
United States: Massachusetts; British Columbia; Germany,
Finland:
Distinguished by its combination of dimensions and by the
horizontal division of the antheridium. Cf. Oe. upsaliense
(No. 29).
27. Oe. pseudoboscii Hirn.
(Pl. XX, fig. 186.)
1900, p. 291, Pl. XIII, fig. 67; Oe. neglectum Hirn 1895, p. 21, Pl. 1, fig. 1; Silf-
venius 1903, p. 15, fig.; Iwanoff 1901, p. 48; Hirn 1906, p. 48, Pl. II, fig. 6.
Monoecious; oogonium 1, subobovoid, pore superior; oospore
ellipsoid-ovoid or ellipsoid, inflating lower part of oogonium, otherwise
not filling it, spore wall smooth; antheridium 1-2, subepigynous;
sperms 2, division horizontal; vegetative cell 8-14 x 64-275; oogonium
41-50 X 75-105u; oospore 38-45 48-60u; antheridium 11-12 10-L1uy.
United States: Illinois, Alabama, Massachusetts; Finland,
Russia.
OEDOGONIUM 77
Iwanoff and Silfvenius (/oc. cit.) both found material of
this species which proved it to be monoecious and not dioecious
(Hirn 1900, 1906). It is characterized by the relatively short
oospore within a much longer oogonium. The diameter of the
oospore is such that the lower part of the oogonium is really
inflated. It bears some resemblance to Oe. paludosum (No. 53)
and Oe. boscit (No. 55). From both it is distinguished by its
smooth oospores. It is unlike Oe. bosci in its monoecious habit.
28. Oe. sodiroanum Lagerheim.
(Pl. XVI, figs. 153 and 154.)
1890, p. 81; Hirn 1900, p. 118.
Monoecious; oogonium 1, ellipsoid-obovoid, pore superior; oospore
ellipsoid, not filling oogonium at upper end, spore wall smooth;
antheridium subhypogynous or subepigynous or scattered, 1-9; sperms 2,
division vertical; vegetative cell 20-2444-84y; oogonium 40-45
70-90u; oospore 38-42 x 56-64; antheridium 20-22 6-8u.
United States: Michigan; Ecuador.
This species originally described incompletely from Ecuador
by Lagerheim was collected nearly forty years later in Michigan
by Miss Alma B. Ackley. The above description is based on
the Michigan material. There can be no question of the validity
of the species. It resembles in general appearance Oe. oviforme
(No. 30), Oe. upsaliense (No. 29), and Oe. richtertianum (No. 26).
It is readily distinguished from these (Cf. No. 29) in dimensions
and habit. The antheridia occur in series and when present
at the end of the filament give the plant a curved appearance,
not unlike that of the androsporangial filaments of Oe. spectabile
(No. 186).
29. Oe. upsaliense Wittrock.
(Pl. XVI, fig. 157.)
1870, p. 125; 1872a, p. 22; 1874, p. 14, Pl. I, fig. 4; Oe. tumidulum (Roth) in
Areschoug Alg. Exs. No. 236, 1864; Hirn 1900, p. 115, Pl. XII, fig. 60; Wittr. and
Nordst. Alg. Exsicc. No. 18; P. B. A. No. 1576:
Monoecious; oogonium 1, obovoid or suboblong-ellipsoid, pore
superior; oospore same form as oogonium (which it fills), spore wall
smooth; antheridium 1-3, subhypogynous; antheridium, oogonium,
and vegetative cell alternating; sperms 2, division vertical; vegetative
cell varying much in same filament; suffultory cell up to 27u in diameter;
basal cell elongate; terminal cell obtuse; vegetative cell 13-20 * 55-160y;
oogonium 45-50 x 66—-100u; oospore 42-47 x 60-75u; antheridium 15-18
x 7-10n.
United States: Michigan, New Hampshire, Ohio, Illinois;
Greenland; France, Germany, Sweden, Latvia.
TA Ee OF DOiGONDAC EAE
“I
0.6)
29a. Var. fennicum Hirn.
(Pl. XVI, fig. 158.)
1895, p. 14; 1900, p. 116, Pl. XII, fig. 61.
Oogonium and oospore larger, ellipsoid; vegetative cell 13-20
55-175u; suffultory cell 25-33x40-66u; oogonium 63-68 X75-85y;
oospore 61-64 X 70-78y; antheridium 15-20 8-13yu
Finland.
This smooth-spored species is one of a few in the genus
combining the monoecious habit with the tendency toward
ellipsoid oogonia. It is distinguished from Oe. oviforme (No. 30)
by its slightly smaller size, its varying diameter of vegetative
cell, and by the rather characteristic alternation of antheridium,
oogonium, and vegetative cell in the filament. Oe. sodiroanum
(No. 28) is smaller and has shorter vegetative cells. Oe.
upsaliense bears some resemblance to Oe. richterianum (No. 26)
but in the latter the sperms result from a horizontal division
of the antheridium, not a vertical division. The variety
fennicum has much larger oogonia and antheridia. The smaller
suffultory cell is usually characteristic of both the species and
the variety.
30. Oe. oviforme (Lewin) Hirn.
(Pl. XVI, fig. 152.)
1900, p. 116, Pl. XII, fig. 62; Oe. urbicum Wittr. var. oviforme Lewin 1888,
p. 17, Pl. 2, fig. 48; Heering 1914, p. 210, fig. 308; Tiffany 1926, p. 100, Pl. VIII,
figs. 78 and 79.
Monoecious; oogonium 1, obovoid to ellipsoid-obovoid, pore superior;
oospore obovoid to ovoid (rarely almost globose), filling or not filling the _
oogonium, spore wall smooth, thick; antheridium 1-4, epigynous,
hypogynous, or scattered; sperms 2, division vertical; basal cell
elongated; vegetative cell 15-23X40-135u4; oogonium 48-55 xX (56-)
65-80u; oospore 46-53 X 50-63u; antheridium 16-19 X 7-12uy.
United States: Iowa; Spain.
The material distributed from Spain shows a more uniformly
obovoid oogonium than is common in the Iowa samples: the
latter approach the ellipsoid-obovoid variation. Cf. Oe. upsal-
zense (No. 29).
31. Oc. geniculatum Hirn.
(Pl. XVI, fig. 155.)
1900, p. 106, Pl. VIII, fig. 48; P. B. A. No. 411.
Monoecious; oogonium 1, obovoid or obovoid-globose, pore superior;
oospore globose or subdepressed-globose, not filling oogonium, spore
wall smooth and thick; antheridium 1—5, subepigynous or subhypogy-
nous or scattered, sometimes alternating with vegetative cells; sperms
(?) 2, division (?) horizontal; vegetative cell 37-48 X 60-135; oogonium
56-63 X 56-684; oospore 48-59 X48—59u; antheridium 37-44 X5—-Qup.
OEDOGONIUM 79
United States: California.
This species is near Oe. capilliforme (No. 387) and Oe.
anomalum (No. 40). It is larger than either and has somewhat
larger oogonia 1n proportion to the size of the vegetative cells
than is the case in Oe. anomalum. The peculiar curvature
(from which the specific name is derived) of the filaments,
due to the opening of the antheridia, is usually characteristic
of. the species.
32. Oe. suboctangulare West and West.
(Pl. XVII, fig. 160.)
1902; ps 129) Pl. 17, figs. land 2; Hirn 1906; p. 23, Pl. I, fig. 4:
Monoecious; oogonium 1, longitudinally rectangular in optical
section, broadly inflated, membrane 3.4-3.8u4 thick, yellow, pore
superior; oospore subrectangular-ellipsoid, filling oogonium except at
the corners; antheridium 2, scattered; vegetative cell 50-54 & 175-240y;
oogonium 53-67 X 82-92u; oospore 50-60 X 73-85y; antheridium 41-48 x
25-27 u.
Ceylon.
The rectangularly appearing oogonium slightly exceeding
the vegetative cells in diameter is a distinctive characteristic.
33. Oe. martinicense Hirn.
(Pl. XVII, fig. 159.)
1900, p. 134, Pl. XVI, fig. 92; Oe. crassum (Hass.) Wittr. in Wolle 1887, p. 74,
Pl. 76, figs. 2 and 3; Collins 1909, p. 240.
Monoecious; oogonium 1, obovoid or subobovoid, pore superior;
oospore obovoid or obovoid-ellipsoid, quite filling oogonium, spore wall
smooth, often thick; antheridium 1—5, hypogynous; sperms 2, division
vertical; vegetative cell 33-37115-240u; oogonium (63—)68-74 x
96-125; oospore 66-72 X 81—-96y; antheridium 33-35 X 5-7u.
United States: Iowa, Kansas; Island of Martinique.
In appearance this species resembles Oe. landsboroughi
(No. 48) or Oe. crassum (No. 49), both of which, however, are
dioecious.
34. Oc. kurzii Zeller.
(Pl. XVII, fig. 163.)
1873, p. 189; 1873a, p. 189;'Hirn 1900, p. 1385, Pl. XVI, fig. 93.
Monoecious; oogonium 1, rarely in series, obovoid or subellipsoid,
pore superior; oospore subglobose or ellipsoid, not filling oogonium,
spore wall smooth; antheridium hypogynous or scattered, to 15-seriate;
sperms 2, division vertical; terminal cell apically obtuse; vegetative
cell 44-5290-250u; oogonium 70-95X111-130u; oospore 67-86
80-93; antheridium 44-52 X 6-16y.
United States: Pennsylvania, Arkansas, Mississippi; India.
SO THE ORDO GCONTNCEE
This species is quite easily recognized by its monoecious
habit, large size, and subglobose to ellipsoid oospores not
filling the oogonia.
35. Oe. capillare (Linnaeus) Kuetzing.
(Pl. XVIII, figs. 164 and 165.)
Conferva capillare L. 1753, 1166; Oe. capillare Kuetz. 1843, p. 255, Pl. 12,
fig. II, 1-10; Kuetz. 1853; p. 18, PDL. 40, fig. 3; Oe. capillare Kuetz. var. flavescens
in Rabenh. Alg. Europe 1861; Oe. stagnale Kuetz. in Rabenh. ibid. 1883; Hirn 1900,
p: 112)-Pl Oct fie. 58: Heering 1914, p. 197, fig. 278; Tiffany 1926, p. ‘Ol, PSE
figs. 39 and 40.
Dioecious, macrandrous; oogonium 1, not or scarcely exceeding the
vegetative cell in diameter, ‘cylindrical to subcylindrical, pore superior;
oospore globose to cylindric-globose to ovoid, not or completely filling
oogonium, spore wall smooth; antheridium 1-4, often alternating with
vegetative cell; sperms 2, division horizontal; basal cell elongate,
terminal cell broadly apiculate to obtuse; female vegetative cell 35-56 x
36-120u, male 35-50*35-90u; oogonium 40-6045-75u; oospore
30-52 X 35-65u; antheridium 30-48 X 5-10z.
United States: Iowa; Austria, Denmark, Finland, France,
Germany, Spain, Italy, Russia, Sweden, Latvia; Africa (Vic-
toria).
35a. Form stagnale (Kuetzing; Wittrock) Hirn.
(Pl. XVIII, fig. 166.)
1900, p. 113, Pl. X, fig. 57; Oe. stagnale Kuetz. 1849, p. 368, and 1853. p. 13,
Pl. 41, fig. 2; Wittrock 1874, p. 31.
Oospore subcylindrical or cylindrical-globose, sometimes con-
stricted at the middle, not filling oogonium; female vegetative cell
38-50 40-100u, male 35-45x36-90u; oogonium 40-60X55-75y;
oospore 36-57 X40-60u; antheridium 33-42 K 5—-9un.
Germany, Latvia, Spain.
This species and its variety are rather readily distinguished
from others by having oogonia which scarcely exceed the
vegetative cells in diameter. They are to be compared with
Oe. suboctangulare (No. 32) and Oe. geniculatum (No. 31),
both of which are monoecious. The variety stagnale 1s separable
from the type on dimensions and shape of oogonium.
36. Oc. plagiostomum Wittrock.
(Pl. XIV, fig. 140.)
Oe. sp. Wittr. 1872a, p. 24, Pl. 1, fig. 11; Wittr. 1874, p. 41; Hirn 1900, p. 100,
Pl. VI, fig. 39; Collins 1918, p. 62; Heering 1914, p. 196, fig. 276; Tiffany 1926, p. 92.
Dioecious, macrandrous; oogonium 1, obovoid-globose, with superior
pore; oospore globose to subglobose, usually filling oogonium, spore
wall smooth and thickened; antheridium 1-6, often alternating with
vegetative cell; basal cell elongate; vegetative cell 22-27 65-120y;
oogonium 42-49 x 50-60u; oospore 41-47 KX 42-49; antheridium 20-24
8—10u.
OEDOGONIUM S1
United States: Illinois, Massachusetts, Iowa, Ohio, Missis-
sippi; Denmark, Sweden; India; South Africa.
36a. Var. gracilius Wittrock.
. (Pl. XIV, figs. 141 and 142.)
1878, p. 142; Hirn 1900, p. 101, Pl. VI, fig. 40; Collins 1909, p. 233; Tiffany 1926,
Pl. IV, figs. 37 and 38. :
Smaller than the type, with vegetative cell usually shorter; vegetative
cell 20-25%X40-100u; oogonium 36-4246-57u; oospore 34-39
36—-44y; antheridium 19-22 7-10uz.
United States: Iowa, New York, Illinois, Ohio, Mississippi;
Germany; Mexico; South Africa.
The species and variety are separated mainly on the basis
of size. The rather regularly globose oospores, with heavy
walls, within obovoid-globose oogonia are characteristic.
37. Oc. capilliforme Kuetzing; Wittrock.
(Pl. XIX, figs. 172 and 173.) ;
Kuetz. 1853, p. 12. Pl. 37, fig. 3; Wittrock 1872a, p. 21; 1874, p. 31; Oe. dioicum
Petrovsky 1861, p. 611, Pl. 13, fig. 6-10; Hirn 1900, p. 107, Pl. VIII, fig. 49; Collins
1909, p. 234; Heering 1914, p. 196, fig. 282; Tiffany 1926, p. 92, Pl. III, figs. 22 and 23.
Dioecious, macrandrous; oogonium 1, obovoid to subovoid, with
superior pore; oospore variable, ovoid-globose, cylindric-globose, sub-
globose, or globose, not filling oogonium, spore wall smooth;
antheridium 2-8, often alternating with the vegetative cell; sperms 2,
division horizontal; basal cell elongate, terminal cell apically obtusé or
apiculate; female vegetative cell 28-38 X 42-120, male 25-30 x 40-100y;
oogonium 42—50 X 51—62yu; oospore 37-45 X 40—50y; antheridium 20-25 x
8-10u.
United States: Missouri, Iowa, Ohio, Mississippi, Illinois;
France, Russia, Sweden; Patagonia; 8. Africa.
37a. Form debaryanum (Chmielevsky) Hirn.
(Pl. XIX, fig. 174.)
1900, p. 108, Pl. VIII, fig. 50; Oe. De Baryanum Chmiel. 1889, p. 1, Pl. 1, figs.
1 and 2; Tiffany 1926, p. 92, Pl. III, figs. 20 and 21.
Oospore globose or subglobose; female vegetative cell 25-37
38-130u, male 22-27X35-100u; oogonium 46-56 52-66yu; oospore
38-50 X40-53u; antheridium 18-24 5-10u.
United States: Iowa; Greenland; Russia.
37b. Form lorentzii (Magnus and Wille) Hirn.
(Pl. XIX, fig. 175.)
1900, p. 109, Pl. IX, fig. 51; Oe. lorentzii Magnus and Wille in Wille 1884, p. 51,
Pl. 3, figs. 99-101.
Oogonium obovoid to obovoid-globose; oospore usually globose” or
subglobose, sometimes cylindric-globose; female vegetative cell, 26-34 x
82 TE AOE DOG ON TAGS Aue
25-100u, male 24-3025-90u; oogonium 40-53X40-65u; oospore
37-47 X 38-54; antheridium 22-30 5-10y.
Uruguay.
37c. Var. australe Wittrock.
(Pl. XIX, figs. 176 and 177.)
In Wittr. and Nordst. Exs. 1886; Oe. princeps (Hass.) Wittr. in Tilden Amer.
Alg. 1894; Hirn 1900, p. 109, Pl. IX, fig. 52; Oe. capilliforme Kuetz.; Wittr. var.
australe Wittr. f. uberosporum Hirn 1900, p. 110, Pl. 1X, fig. 538; Tiffany 1926, p. 92.
Oogonium obovoid-globose to subglobose; female vegetative cell
24-36 X 26-100u, male 22-33x40-100u; oogonium 37-53 X43-60y;
oospore 35-50 X 36—55yu; antheridium 21-26 X4-9u.
United States: Minnesota, Iowa, New York, South Dakota,
Nebraska, California; Africa; Uruguay, Argentine, Brazil;
Mexico; Vancouver.
37d. Var. diversum (Hirn) Tiffany.
(Pl. XIX, fig. 178.)
1929, p. 75; Oe. capilliforme Kuetz.; Wittr. var. australe Wittr. f. diversum Hirn
1900, p. 110, Pl. IX, fig. 54; Oe. stagnale Kuetz. in Tilden Amer. Alg. 1896.
Dimensions larger throughout; female vegetative cell 34-46
45-130u, male 33-4050-120u; oogonium 46-56X46-70u; oospore
43-52 x 40-58; antheridium 30-37 X 6-I1y.
United States: Iowa, Colorado, Montana, Minnesota.
The “‘capilliforme’’ group is readily recognized by the
smaller male vegetative filaments and shape of oogonia. The
group is variable within itself, however, and the above varieties
are recognized on the basis of differences in shape of oogonia
and in dimensions.
38. Oe. princeps (Hassall) Wittrock.
(Pl. XVIII, figs. 167-169.)
Vesiculifera princeps Hass. 1842, p. 388; V. cupillaris Hass. 1845, p. 195, Pl. 50,
figs. 1 and 2; Oe. princeps Wittr. 1874, p. 42; Hirn 1900; p. 289, Pl. X, fig. 56.
Dioecious, macrandrous; oogonium 1, little tumid, subobovoid,
pore superior; oospore globose or subglobose, not filling oogonium, spore
wall smooth; terminal cell apiculate; antheridium 1-7; vegetative cell
33-42 X 40-1334; oogonium 54-63X67-80u; oospore 48-58 x 50-60y;
antheridium 32-38 8—20u.
United States: Minnesota, Mississippi; England.
I have seen specimens of this alga from both Minnesota
and Mississippi with immature antheridia which appear to
belong with the oogonial filaments. I have therefore placed
the species in the dioecious group. The cells of the antheridial
filaments are somewhat longer than those of the male plants.
It should be compared with the monoecius Oe. geniculatum
(No. 31) and the dioecious Oe. capilliforme (No. 37). It is
more robust than the latter.
OEDOGONIUM 83
39. Oc. biforme Nordstedt.
(Pl. XVI, figs. 161 and 162.)
In Wittrock and Nordstedt Exs. 1880; Hirn 1900, p. 147, Pl. XXII, fig. 112.
Dioecious, macrandrous; oogonium 1 (rarely 2), pore superior,
cylindric-obovoid; oospore oblong-ellipsoid to subglobose or nearly
globose, generally not filling oogonium, spore wall smooth; antheridium
to 21-seriate; sperms 2, division vertical; female vegetative cell 22-32
55-140u; male 18-28X45-140u; oogonium 37—-5248-90u; oospore
36-48 X 40-70u; antheridium 18-28 x 6-15uy.
Brazil, Paraguay, Ecuador.
Near Oe. oboviforme (No. 46) and Oe. grande (No. 45);
distinguished chiefly by its cylindric-obovoid oogonium.
40. Oe. anomalum Hirn.
(Pl. XVIII, figs. 170 and 171.)
1900, p. 112, Pl. X, fig. 55; Oe. stagnale Kuetz. var. variabilis Lewin 1888, p. 17,
Me ees: 44-48; Heering 1914, p. 197, fig. 277; Tiffany 1926, p. 91, Pl. I, figs.
an C
Dioecious, macrandrous; oogonium 1, subovoid or cylindric-ovoid,
pore superior; oospore globose or subglobose, not filling oogonium,
spore wall smooth; antheridium 4-13, sperms 2, division vertical;
terminal cell apically obtuse; female vegetative cell 40-50 80-3800uz,
male 33-42x80-240u; oogonium 54-6468—-75u; oospore 48-60
52-61u; antheridium 30-40 6-18u.
United States: Iowa; Spain.
This species has some of the appearances of Oe. capillare
(No. 35), particularly in the relatively small difference between
the diameter of the vegetative cells and that of the oogonia.
41. Oe. fabulosum Hirn.
(Pl. XXV, figs. 215 and 216.)
900s pe 114s Pl xl fies 595° =
Dioecious, macrandrous; oogonium 1, little tumid, cylindrical, pore
superior; oospore globose or ellipsoid, not filling oogonium in length,
spore wall smooth; antheridium seriate; sperms 2, division vertical;
vegetative cell 74-85 115-210u; oogonium 81-96 X 104-133; oospore
75-89 X 78-104; antheridium 68-80 X 7—22z.
Brazil.
41a. Var. maximum (West) Hirn.
(Pl. XXV, figs. 217 and 218.)
1906, p. 13, Pl. II, fig. 5; Oe. maximum West 1901, p. 75, Pl. IV, figs. 39-41.
Oogonium wall thick; oospore subglobose to subcylindrical, filling
oogonium or nearly so; basal cell elongate; terminal cell obtuse or
broadly apiculate; vegetative cell 70-93 X 105-335yu; oogonium 75-107 X
75-136; oospore 70-100 X65-110u; antheridium 65-86 X 7—20u.
Siam (Koh-chang).
84 Tr EOE DOE ON PACES
4lb. Var. columbianum G. S. West.
(Pl. XXV, fig. 219.) .
1914, p. 1048, text fig. 3D.
Vegetative cell more slender; oogonium a little longer and more
tumid; oospore more ellipsoid than the type; vegetative cell 56-70
248-425; oogonium 98-100 X 163-1744; oospore 81-84 X 124-128.
Columbia.
4ic. Var. punctatum Lemmermann.
1910, p. 313.
Oogonium not tumid; oospore globose, not filling oogonium in length,
spore wall yellow-brown, densely punctate; vegetative cell 64-75
210—-245u; oogonium 64-75 101-1184; oospore 63-71 X63-71p.
Paraguay.
Oe. fabulosum with its three varieties represents the largest
size attained by any species of the genus so far recorded. The
variety punctatum is easily separable by its punctate oospore,
although unfortunately Lemmermann left no figure; colum-
bianum is the most slender; maximum is slightly larger than the
species.
42. Oe. rivulare (Le Clerc) Al. Braun.
: (Pl. XXIV, figs. 209 and 210.) é
(2?) Prolifera rivularis Le Cl. 1817, p. 472, Pl. 23, fig. 1; Oe. rivulare Al. Br. 1855,
p23, Blanes. IO Sica 1900s plo Bileexchi es O0.
Dioecious, macrandrous; oogonium 1-7, obovoid, pore superior;
oospore obovoid, ellipsoid, or subglobose, not filling oogonium longi-
tudinally, spore wall smooth; antheridium to 13-seriate; sperms. 2,
division horizontal; basal cell elongate; female vegetative cell 35-45 xX
110-350pu, male 30-36 X 120-280u; oogonium 70-85 X 130-1604; oospore
55-70 X 65-100; antheridium 21-28 X 14—26n.
United States: Iowa, Florida, Massachusetts; Denmark,
England, Austria, France, Scotland, Germany, Sweden.
Very readily recognized by its large size and particularly by
its oospore which is much smaller than the oogonium.
43. Oe. pachyandrium Wittrock.
(Pl. XX, figs. 179 and 180.)
In Wittr. and Nordst. Alg. Exs. No. 5, 1877; Hirn 1900, p. 142, Pl. XX, fig. 104.
Dioecious, macrandrous; oogonium 1-3, subobovoid or obovoid-
ellipsoid, pore superior; oospore ellipsoid, not filling oogonium (rarely
inflating it), spore wall smooth; antheridium 1-4; sperms 2, division
vertical; female vegetative cell 30-36 X 80-220u, male 32-45 x 60-160;
oogonium 53-57 X 84—-108u; oospore 51-54 69-85y, antheridium 30-43
X 11-20.
United States: Pennsylvania, New Jersey, Massachusetts;
Sweden.
OEDOGONIUM 85
This plant is very near Oe. grande (No. 45), but is dis-
tinguished by having male filaments larger than the female.
44, Oe. mexicanum Wittrock.
(Pl. XXI, figs. 188 and 189.)
1878, p. 138; Hirn 1900, p. 147, Pl. XXII, fig. 111.
Dioecious, macrandrous; oogonium 1, cylindric-obovoid, pore
superior; oospore cylindric-obovoid, quite or nearly filling oogonium;
spore wall smooth; antheridium to 8-seriate; sperms 2, division vertical;
female vegetative cell 34—41 x 60-140, male 30-38 X 60-1144; oogonium
53-63 X 76— 110u; oospore 51-60 X 63-80yu; antheridium 28-35 X 7-17».
United States: South Dakota, Massachusetts; Mexico.
This species is close to Oe. grande below, being usually
distinguished by its larger and considerably shorter vegetative
cells and by its more cylindric oogonia.
45. Oe. grande Kuetzing; Wittrock.
(Pl. XXII, figs. 195 and 196.)
In Wittr. and Nordst. Alg. Exs. No. 502, 1883; Kuetz. 1845, p. 200, 1853, p. 12,
Pl. 37, fig. 1; Hirn 1900, p. 148, Pl. X XI, figs. 105-106; Collins 1909, p. 242; Heering
1914, p. 202, fig. 288; Tiffany 1926, p. 98, Pl. II, figs. 14-16; P. B. A. No. 811.
Dioecious, macrandrous; oogonium 1—5, subobovoid, pore superior;
oospore of the same form as oogonium, which it completely fills or
not, spore wall smooth; antheridium 1—10; sperms 2, division vertical;
basal cell elongated; female vegetative cell 28-3770-210u, male
28-33 X 70-1754; oogonium 49-60 86-1104; oospore 47-58 x 60—94y;
antheridium 25-33 & 11-18u.
United States: Iowa, Maine, Massachusetts, Pennsylvania,
California, Michigan, Illinois, Ohio, Minnesota, Mississippi,
Connecticut; Ontario; Australia; Austria, Sweden, Switzerland.
45a. Form gemelliparum (Pringsheim) Hirn.
(Pl. XXII, fig. 200.)
1900, p. 145, Pl. XXI, fig. 107; Oe. gemelliparum Pringsh. 1858, p. 71, Pl. 5,
ae At Oe. landsboroughi (Hass.) Wittr. var. gemelliparum (Pringsh.) Wittr. 1874,
p. 36.
Oogonium ellipsoid-ovoid, antheridium seriate; vegetative cell
20-27 * 60-200u; oogonium 55-57 & 75—-80p; oospore 49-51 X 65-69.
Germany.
45b. Var. aequatoriale Wittrock.
(Pl. XXII, fig. 201.)
In Wittr. and Nordst. Alg. Exs. No. 1016, 1893; Hirn 1900, p. 145, Pl. X XT, fig.
108; Oe. grande Kuetz.; Wittr. var. aequatoriale Wittr. f. hortense Wittr. in Hirn
1900, p. 145, Pl. X XI, fig. 109.
Vegetative cell 26-33 < 70-165; oogonium 44-51 X 75-100u; oospore
42-49 X 50-8 1p.
Ecuador; Greenland.
&6 Hort OEDO'GCONTACE AE
45c. Var. angustum Hirn.
(Pl. XXII, figs. 198 and 199.)
1900, p. 146, Pl. X XI, fig. 110; P. B. A. No. 410.
Vegetative cell and oogonium elongated; antheridium to 36-seriate;
oogonia sometimes 4; vegetative cell, female 19-3070-330u, male
19-25 X 80-225; oogonium 42-5262-110u; oospore 40-50 60-89y;
antheridium 18-22 7—-15u.
United States: Massachusetts, Mississippi, Michigan, IIli-
nois; Brazil.
45d. Var. majus Hansgirg.
(Pl. XXII, fig. 197.)
1886, p. 45; Oe. grande forma robusta Hirn 1900, p. 144; Collins 1918, p. 68;
Oe. grande Kuetz.; Wittr. var. robustum (Hirn) Tiffany 1924, p. 186, Pl. III, fig. 7,
and 1926, p. 94, Pl. I1, fig. 19.
Larger than the type; female vegetative cell 36-46 x 80-200, male
32-42 X 80-2004; oogonium 52-68X75-90u; oospore 50-64 68-88u;
antheridium 30-36 X 10—16u.
United States: Illinois, Iowa, Michigan, Ohio, Massa-
chusetts; Austria, Czecko Slovakia, Latvia.
Oe. grande is one of our commonest species. The sub-
obovoid oogonia often in series, with superior pore, the accom-
panying smaller male filaments with vertical division of the
antheridium are distinctive characters. The varieties are
distinguished on the basis of size and differences in shape of
oogonia.
The common occurence of the distinct, robust variety of
Oe. grande led to the varietal name robustum (Tiffany 1924).
Hansgirg’s description of the variety majus is so near that:
given above that the prior name must be used, in spite of its
relegation by Hirn (1900) to be synonymous with the robust
form of the type. Skuja (1927) records a robust form of
Oe. grande with slightly smaller dimensions, which I have
included under the variety majus. The dimensions of this
variety are from the American material.
46. Oc. oboviforme Wittrock.
(Pl. XX, figs. 184 and 185.)
1878, p. 140; De Toni 1889, p. 74; Hirn 1900, p. 141, Pl. XX, fig. 103; Collins
1909, p. 241.
Dioecious, macrandrous; oogonium 1, obovoid, pore superior;
oospore obovoid (rarely ellipsoid-obovoid), about filling oogonium,
spore wall smooth; antheridium to 19-seriate, sperms 2, division vertical ;
basal cell elongate; female vegetative cell 21-33 X 72-280; male 21-31 X
72-270u; oogonium 55-65 X80-1074; oospore 54-61X70-85y; anth-
eridium 21-28 x 5-13u.
Brazil; Mexico.
OEDOGONIUM S87
Distinguished from Oe. mexicanum (No. 44) by longer
vegetative cells. Its obovoid and slightly larger oogonia
usually separate it from Oe. grande, above.
47. Oe. subrectum Hirn.
(Pl. XX, figs. 181-183.)
1900, p. 141,'Pl. XX, fig. 102.
Dioecious, macrandrous; oogonium 1-2, subellipsoid or obovoid-
ellipsoid, pore superior; oospore ellipsoid or globose-ellipsoid, filling or
nearly filling oogonium, spore wall smooth, often thick; antheridium to
9-seriate, sperms 2, division vertical; basal cell elongate; terminal
cell apically obtuse; vegetative cell, female, 27-35 x 160-340yu, male
26-33 X 104-800u; oogonium 70-83 X 83-1034; oospore 65-80 X 75—-93y;
antheridium 22-28 x 8-14.
Brazil.
Characterized among the species with obovoid-ellipsoid
oogonia by its size and the relatively long vegetative cells.
48. Oe. landsboroughi (Hassall) Wittrock.
(Pl. XXIV, figs. 211 and 212.)
Vesiculifera landsborought Hass. 1842, p. 289, and 1845, p. 197, Pl. 51, fig. 2;
Oe. landsborought Wittr. 1874, p. 35; Oe. gemelliparum Pringsh. in Rabenh. Alg.
Eur. No. 1118, 1861; Oe. gemelliparum v. majus Wittr. 1870, p. 137; Oe. tumidulum
Kuetz. in ibid No. 1468, 1863; Hirn 1900, p. 185, Pls. XVI and XVII, figs. 94 and 95;
Collins 1909, p. 241; Heering 1914, p. 200, fig. 285; Tiffany 1926, p. 93, Pl. II, figs.
12,and 13; P. B: A. No. 663:
Dioecious, macrandrous; oogonium 1-2, (rarely 3), obovoid to ovoid,
pore superior; oospore ovoid to ellipsoid, filling or not filling the oogoni-
um, spore wall smooth; antheridium up to 30-seriate; sperms two, division
vertical; basal cell elongate, terminal cell obtuse; female vegetative cell
31-40 X90-240u, male 30-37 X120-225u; oogonium 63-78 X85-115y;
oospore (55—) 59-70X73-102y; antheridium 27-35 X 9-20u.
United States: Iowa, Ohio, Connecticut, Michigan, Massa-
chusetts, New York, Mississippi; British Columbia; Paraguay,
Uruguay; Mexico; Austria, England, Finland, France, Germany,
Norway, Russia, Sweden.
48a. Var. norvegicum Wittrock.
(Pl. XXIV, figs. 213 and 214.)
In Wittr. and Nordst. Alg. Exs. No. 204, 1879; Oe. landsboroughi var. robustum
Wittr. in Wittr., Nordst. and Lagerh. Alg. Exs. No. 1215, 1896; Hirn 1900, p. 137,
Pl. XVII, figs. 97 and 98; Tiffany 1926, p. 93.
Vegetative cells shorter but of larger diameter; female vegetative
cell 38-45 K 60-160u, male 36-45 X 55-135; oogonium 64-73 X 70-105;
oospore 60-70 67-90y; antheridium 35-45 x 8—-l5uy.
United States: Iowa; Norway; Brazil; Mexico.
It is rather difficult to indicate the exact differences between
the landsboroughi group and the crassum group in the genus,
88 TT wo OsD:0 COW AC Ey AcE
although one can scarcely confuse the two after some familiarity
with them. The shape of the oogonia is quite similar in each,
but the oospore is perhaps the most distinctive characteristic.
The oospore of landsboroughit varies from ovoid to ellipsoid
while the oospore of crassum varies from ellipsoid to nearly
globose. Globose oospores are never present in Oe. lands-
borought. The variety norvegicum has stouter and_ shorter
vegetative cells. Compare also with Oe. subrectum (No. 47)
and Oe. grande (No. 45).
49. Oe. crassum (Hassall) Wittrock.
(Pl. XXIII, figs. 202 and 203.)
(?) Vesiculifera crassa Hass. 1842, p. 389; Oe. crassum Wittr. 1872a, p. 20, Pl. 1,
figs. 4-6; Hirn 1900, p. 139, Pl. XVIII, fig. 99; Heering 1914, p. 200, fig. 286; Tiffany
1926, p. 93, Pl. II, figs. 17 and 18.
Dioecious, macrandrous, oogonium 1-2, ovoid to obovoid-ellipsoid,
pore superior; oospore ellipsoid to globose, filling or not filling oogonium,
spore walls smooth; antheridium 2-25; sperms 2, division vertical;
female vegetative cell 36-50 X 72-340y, male 30-36 X 72-260u; oogonium
60-78 X 85-1204; oospore 58-76 X75—-96yu; antheridium 28-32 X 10—-20uz.
United States: Iowa, Florida, Ohio, Michigan, Mississippi,
Alabama, Indiana; Austria, England, Germany, Sweden; South
Africa.
49a. Form amplum (Magnus and Wille) Hirn.
(Pl. XXIII, figs. 204 and 205.)
1900, p. 1389, Pls. XVIII and XIX, fig. 100; Oe. amplum Magnus and Wille in
Wille 1884, p. 40, Pl. 2, figs. 65 and 66; Oe. crassum (Hass.) Wittr. in Wille 1884,
p. 39, Pl. 2, fig. 64; (?) Oe. rivulare (Le Cl.) Al. Br. var. major Wolle 1887, p. 92, .
PIiWGete. (and 8.
Of larger dimensions; vegetative cell, female 46-54 70-160u,
male 42-5065-200u; oogonium 75-90X83-1154; oospore 72-85X
77-100u; antheridium 40—50 X 8—20u.
United States: Ohio, Illinois, Mississippi, (?) Florida, Michi-
gan; Uruguay, Brazil.
49b. Var. longum Transéau.
(Pl. XXIV, fig. 208.)
1918, p. 237.
Elongated oogonium and oospore; vegetative cell, female 40-52
< 100-240u, male 36-44100-180u; oogonium 68-84% 120-180;
oospore 66-80 X 100-125; antheridium 34-40 8-14u.
United States: New York (Short Point Bay, Oneida Lake).
49c. Var. subtumidum Hirn.
(Pl. XXIII, figs. 206 and 207.)
1900, p. 140, Pl. XIX, fig. 101.
OED OGONILUM 89
Longer vegetative cells; oogonium and oospore larger than in type;
vegetative cell, female 42-50X120-250u, male 40-48X120-240,;
oogonium 75-85X96-1374; oospore 67-79X84-100u; antheridium
34-45 X 7-1du.
Brazil; South Africa. r
For a discussion of the chief characteristics of the crassum
group, see notes under Oe. landsborought (No. 48). The variety
- amplum is larger than the species proper and has shorter
vegetative cells than the variety subtumidum. Fritsch’s form
of crassum from South Africa is nearest the variety subtumidum.
The variety Jongum is readily characterized by its elongated
oogonia and oospores.
50. Oe. exocostatum Tiffany.
(Pl. XXVII, figs. 235-237.)
1921, p. 272, Pl. I, figs. A-F, 1926, p. 94, Pl. V, figs. 51-54.
Dioecious, macrandrous, oogonium 1-2, ellipsoid to ellipsoid-
globose, occasionally terminal, pore superior; oospore of the same form
as the oogonium, which it very nearly completely fills, spore wall of two
layers: the outer marked by 13-15 longitudinal ribs, inner smooth;
suffultory cell swollen; male filament a little more slender than the
female, antheridium 3-7; sperms 2, division horizontal; basal cell
elongate; female vegetative cell (138—) 18-25 x 72-140, male (13—) 16-20
<48-100u; suffultory cell 22-3060-90u; oogonium 40-52 60-96y;
oospore 38-41 X 56-68; antheridium 12-16 X7-12uy.
United States: Iowa, Ohio.
This species is readily distinguished by the presence of
longitudinal ribs on the outer layer of the oospore wall. Other-
wise it is similar in appearance to Oe. crenulatocostatum (No. 57).
51. Oc. kjellmanii Wittrock; Hirn.
(Pl. XXVI, fig. 223.)
1900, p. 127, Pl. XIV, fig. 82; Wittr. 1880, 71 Wittr. and Nordst. Alg. Exs.
No. 306.
Dioecious, macrandrous; oogonium 1, cbovoid or rarely subellipsoid,
pore superior; oospore ellipsoid or subellipsoid, not completely filling
oogonium, spore wall of 3 layers: outer layer internally ribbed, middle
layer with 35-45 slightly crenulate longitudinal ribs, anastomosate,
inner layer smooth; antheridium to 30-seriate; sperms 2, division
vertical; female vegetative cell 15-22 45-120u; male 14-18 56-120y;
oogonium 41-50 x 60—75y; oospore 39-47 48-57; antheridium 12-15 X
4—12u.
Borneo.
Characterized by the large number of longitudinal ribs on
the middle layer of the oospore.
90 Tre OE DiO'E ONE NOeRAE
52. Oe. paulense Nordstedt and Hirn.
(Pl. XXVI, fig. 224.)
In Hirn 1900, p. 292, Pl. XIV, fig. 80; Schmidle 1901, p. 344, Pl. XII, fig. 1;
Hirn 1906, p. 45, Pl. II, fig. 5.
Monoecious; gogonium 1, subellipsoid or ellipsoid-ovoid, pore
superior; oospore ellipsoid, not or quite filling oogonium, spore wall of
three layers: outer layer smooth, middle layer with 18-22 longitudinal
ribs, entire and sometimes anastomosate, inner layer smooth;
antheridium 1-2, subepigynous; sperms 2, division horizontal; vege-
tative cell 10-15 X50-120u; oogonium 33-88 X 43-68; oospore 30-36 X
38—45u; antheridium 10-146-S8u.
Brazil; Australia.
Schmidle’s record of this species from South America
definitely placed it in the monoecious group. Its small size
and fewer ribs on the oospore are characteristic.
53. Oc. paludosum (Hassall) Wittrock.
(Pl. XXVI, fig. 231.)
Oe. paludosum Wittr. 1870, p. 124; (2?) Vesiculifera paludosa Hass. 1845, p. 199,
Pl. 52, fig. 3; Hirn 1900, p. 120, Pl. XIII, fig. 69; Collins 1909, p. 237.
Monoecious; oogonium 1, ellipsoid, pore superior; oospore ellipsoid,
filling oogonium, spore wall in three layers: outer and middle layers
with 27-35 longitudinal ribs, continuous, rarely anastomosate;
antheridium 1-8, scattered, often in the upper part of the filament;
sperms 2, division vertical; vegetative cell 15-20 50-140u; oogonium
39-48 X 66-84; oospore 36-45 X 54-63u; antheridium 14-16 6-13u.
United States: Illinois, Pennsylvania; British Columbia,
Norway, England, Sweden.
53a. Var. americanum Nordstedt.
(Pl. XXVII, fig. 233.)
In Hirn 1900, p. 121, Pl. XIII, fig. 72; Collins 1909, p. 237.
Oogonium larger; vegetative cell 14-23 x 45-156; oogonium 54-63 X
75-90u; oospore 49-57 X 69—75u; antheridium 12-18 X 7—-12u.
United States: South Carolina.
53b. Var. parvisporum Hirn.
(Pl. XXVI, fig. 232.)
1900, p. 120, Pl. XIII, fig. 70; (2?) Oe. pringsheimiana Archer 1868, p. 295; (?) Oe.
archerianum Cooke 1884, p. 157; Borge 1913, p. 63, fig. 1.
Oogonium subellipsoid or suboblong-ellipsoid; oospore not filling
oogonium; antheridium subepigynous or subhypogynous or scattered;
vegetative cell 15-2045-120u; oogonium 38-44X70-86y; oospore
35-41 X 54-60u; antheridium 15-17 X7-12uy. .
United States: Illinois, Michigan, Ohio; Spain, Sweden.
OEDOGONIUM QO]
Oe. paludosum is to be compared with Oe. boscii (No. 55)
from which it differs in being monoecious. The two varieties
are distinguished chiefly by relative sizes and by differently
shaped and incompletely filled oogonia.
54. Oc. leiopleurum Nordstedt and Hirn.
(Pl. XXVI, figs. 221 and 222.)
Rat Hirn 1900, p. 126, Pl. XIV, fig. 79; Oe. kjellmaniw Wittr. in Nordst. 1888a,
p. 196.
Dioecious, macrandrous; oogonium 1-4, obovoid (or ellipsoid-
obovoid) or subellipsoid, pore superior; oospore obovoid-ellipsoid or
subellipsoid, usually filling oogonium, spore wall in three layers: outer
and middle layers with 26-80 longitudinal ribs, entire, sometimes
anastomosate, inner layer smooth; antheridium to 24-seriate, sperms 2,
division horizontal; basal cell elongate; terminal cell apically obtuse;
female vegetative cell 15-2545-170u, male 15-17 X45-85y; oogonium
40-51 X 65-83; oospore 39-49 X50-68u; antheridium 15-17 X7-15u.
Africa.
To be compared with Oe. boscii below. Its large number of
seriate antheridia and usually completely filled oogonia are
characteristic.
55. Oe. boscii (Le Clerc) Wittrock.
(Pl. XXVI, figs. 225 and 226.)
1874, p. 34; (2?) Prolifera Boscii Le Clerc 1817, p. 474, Pl. 23, fig. 5; Conferva
vesicata Ag. in Desmaz. Exs. 1845; Hirn 1900, p. 122, Pl. XIII, fig. 73; Wittr.,
Nordst. and Lagerh. Alg. Ex. No. 1218.
Dioecious, macrandrous; oogonium 1 (rarely 2), oblong-ellipsoid,
pore superior; oospore ellipsoid, not nearly filling oogonium longi-
tudinally, spore wall of three layers: outer and middle layers with
27-35 continuous, rarely anastomosate, longitudinal ribs; antheridium
1-8, scattered, often in upper part of filament; sperms 2, division
vertical; vegetative cell, female 14-23 X 45-135, male 13-18 X 52-108;
oogonium 39-51 75—-110u; oospore 36-43 X 56—70y; antheridium 13-14
X 6-16y.
United States: Connecticut, Massachusetts, Iowa, Cali-
fornia, Illinois, Ohio, Mississippi; Austria, England, Finland,
France, Germany, Switzerland, Norway, Latvia, Sweden;
Brazil; Greenland; British Columbia.
55a. Form dispar Hirn.
(Pl. XXVI, fig. 230.)
1900, p. 124, Pl. XIV, fig. 76; P. B. A. No. 1226.
Oospore smaller, ellipsoid-globose or subglobose; vegetative cell
14-21 X 60-170u; oogonium 38-45 X 70-92u; oospore 34-43 & 44-55n.
United States: Massachusetts, Pennsylvania, California.
CO
bo
THE OEDOGONIACEAE
55b. Var. notabile Lemmermann.
(Pl. XXVI, fig. 229.)
1898, p. 511, Pl. 5, figs. 21-23; Hirn 1900, p. 125, Pl. XIV, fig. 78.
Oogonium suboblong-obovoid; oospore obovoid or.ellipsoid-obovoid;
vegetative cell 15-20X60-150u; oogonium 45-50X90-105u; oospore
4449 X 75-85y.
Germany.
55c. Var. occidentale Hirn.
(Pl. XXVI, figs. 227 and 228.)
1900, p. 125, Pl. XIV, fig. 77, P. B. A. No. 1671.
Smaller; vegetative cell 8-15 X50-165n; oogonium 33-388 X 75-100;
oospore 32-37 X45-50u; antheridium 12-13 X 10-16u..-
United States: Maine.
To be compared with Oe. paludosum (No. 53) and Oe.
letopleurum (No. 54).
56. Oc. margaritiferum Nordstedt and Hirn.
(Pl. XXVIH, fig. 234.)
In Hirn 1900, p. 128, Pl. XV, fig. 83.
Dioecious, macrandrous; oogonium 1, suboblong-ellipsoid or sub-
obovoid-ellipsoid or subellipsoid, pore superior; oospore ellipsoid or
globose-ellipsoid, usually not filling oogonium longitudinally (rarely
quite filling it), spore wall of three layers: outer and middle layer with
30-35 granulate, anastomosate, longitudinal ribs, inner layer smooth;
antheridium to 10-seriate; sperms 2, division vertical; female vegetative
cell 23-28 X82-190u, male 17-23 X70—160y; oogonium 50-63 X 82-100y;
oospore 48-61 X 55-75; antheridium 18—20X7-138z.
Brazil.
The granulate ribs of the oospore are distinctive. Compare
with Oe. kjellmanti (No. 51).
57. Oe. crenulatocostatum Wittrock.
(Pl. XXVIII, figs. 240 and 241.)
Ss
. 84; Collins 1909, p. 239; Heering 1914, p. 198, fig. 280; Tiffany 1926, p. 94, Pl. V,
s. 48-50.
Dioecious, macrandrous; oogonium 1-6, obovoid to subellipsoid,
often terminal, pore superior; oospore of the same form as the oogonium,
which it nearly or quite fills, outer spore wall smooth, median wall with
14-20 longitudinal ribs, crenulate and sometimes anastomosing, inner
wall smooth; antheridium 2-6, often alternating with vegetative cell;
sperms 2, division horizontal; terminal cell obtuse to broadly apiculate;
female vegetative cell 10-18 X25=125u, male 9-13 X32-80y; oogonium
30-36 X 40-65; oospores 28-34 X 37—55y; antheridium 9-12 x 9—l4u.
United States: Pennsylvania, Iowa, New York, Massa-
chusetts, Ohio, Illinois, Connecticut, New Hampshire, Michigan.
=
OEDOGONIUM 93
57a. Form cylindricum Hirn.
(Pl. XXVIII, fig. 244.)
1900, p. 129, Pl. XV, fig. 85; Oe. boscu (Le Cl.) Wittr. in P. B. A. No. 118, 1895.
Oogonium and oospore cylindric-oblong or more rarely ellipsoid or
obovoid-ellipsoid; ribs of vospore scarcely crenulate; vegetative cell
11-16 X44-150y; oogonium 30-36 X42-81lyu; oospore 27-34 K 4065p.
United States: Massachusetts, Connecticut, Missouri, Illi-
nois, New Hampshire.
57b. Var. aureum Tilden.
(Pl. XXVIII, fig. 245.)
In Amer. Algae, Nos. 123 and 186, 1896; 1898, p. 90, PI. 8, figs. 1-3; Hirn 1900,
Pl. XV, p. 130, fig. 87.
Oospore obovoid to globose-ellipsoid, not completely filling oogonium,
middle spore wall with dentate ribs (sometimes nearly areolate);
vegetative cell 10—-13X35-110y; oogonium 30-35X38-50u; oospore
29-33 X 35-43yu; antheridium 10 10x.
United States: Colorado.
57c. Var. longiarticulatum Hansgirg.
(Pl. XXVIII, figs. 242 and 243.)
1888, p. 46; Oe. calosporum Hirn 1895, p. 20, Pl. 1, fig. 3; Hirn 1900, p. 130,
Pl. XV, fig. 86.
Oogonium single; oospore obovoid to nearly ellipsoid, not filling
oogonium, ribs of median layer of spore wall distinctly crenate; veg-
etative cell 12-15 60—-90y; oogonium 27-30 58—0u; oospore 24-27 X
44-52y.
United States: Michigan, Massachusetts; Austria, Finland;
Brazil.
There exists considerable variation in the members of the
crenulatocostatum group. ‘The crenate or crenulate ribs (some-
times nearly smooth), the usually seriate oogonia, and small
size are characteristic. Cf. Oe. exocostatum (No. 50). The
variety aureum has dentate ribs which sometimes appear nearly
areolate. It is felt, after examining hundreds of specimens of
this group, that the above form and varieties are usually
sufficiently distinct to be recognized. Ecological variants are
common and to give varietal distinction to each of these is
merely to make a difficult situation worse. Plants of longzarit-
culatum from Brazil are slightly smaller in all dimensions than
those given above (Borge).
Q4 cH. (On ©.GON EAC BAw
58. Oe. arcyosporum Nordstedt and Hirn.
(Pl. XXVIII, fig. 247.)
In Hirn 1900, p. 104, Pl. VII, fig. 44.
Monoecious; oogonium 1-5, obovoid to ellipsoid-globose, pore
superior; oospore ellipsoid-globose to subglobose, not usually filling
oogonium, spore wall of three layers: outer smooth, median areolate,
inner smooth; antheridium 1-4, subepigynous to subhypogynous;
vegetative cell 138-2050-200u; oogonium 41—-55x43-68u; oospore
38-50 X 40-55u; antheridium 11-15 X8-12uy.
Brazil.
The only monoecious form with an areolate oospore wall.
59. Oe. areolatum Lagerheim.
(Pl. XXVIII, figs. 248-250.)
1890, p. 80 and 89; Hirn 1900, p. 105, Pl. VII, fig. 45; Tiffany 1926, p. 91.
Dioecious, macrandrous; oogonium 1-4, obovoid or obovoid-globose,
with superior pore; oospore subellipsoid or ellipsoid-globose, filling or not
filling oogonium, middle layer of spore wall areolate; antheridium 3-12,
sperms 2; basal cell elongate; terminal cell apically obtuse; female
vegetative cell 16-21X65-165u, male 15-19X60-140u; oogonium
48-60 X 60-75; oospore 45-57 X 48-60yu; antheridium 14-17 X8-10u.
United States: Iowa, Ohio; Ecuador, Brazil. ae
This species is to be compared with Oe. hoehnez (No. 202).
It is one of the few dioecious macrandrous forms with areolate
oospores.
60. Oc. dictyosporum Wittrock.
(Pl. XXVIII, fig. 246.)
1874, p. 13; Hirn 1900, p. 103, Pl. VII, fig. 43; Tiffany 1926, p. 99.
Monoecious; oogonium 1-2, obovoid-globose, with superior pore;>
oospore globose to ellipsoid-globose, usually not filling oogonium, outer
layer of spore wall reticulate, inner smooth; antheridium 1-8, sub-
epigynous; sperms 2; vegetative cell 11-16 25—-95yu; oogonium 33-40
38-46u; oospore 28-38 x 30—-40u; antheridium 8-13 X5-10n.
United States: Iowa; Brazil; Africa.
60a. Form westii Tiffany.
1929, p. 74; Oe. dictyosporum Wittr. forma West 1907, p. 98.
Oogonium and oospore ovoid-ellipsoid; a little larger; vegetative
cell 14-16 X50-80u; oogonium 42% 52u; oospore 40 50u; antheridium
13 X8—9un.
Africa.
The only monoecious representatives of the genus with
reticulate oospores are Oe. dictyosporum and its f. westiz. The
latter is a little larger than the type and is better recognized
as a form until we have more data on its distinctive character-
istics.
OEDOGONIUM 05
61. Oc. foveolatum Wittrock.
(Pl. XXIX, fig. 252.)
1878, p. 1383; Hirn 1900, p. 106, Pl. VII, fig. 46.
Monoecious; oogonium 1-2, obovoid to subellipsoid-globose, with
superior pore; oospore globose to subellipsoid-globose, filling or not
filling oogonium, outer spore wall scrobiculate; antheridium 1-7; sperms
two, division horizontal; basal cell elongate, terminal cell apically
obtuse; vegetative cell 14-23X35-115yu; oogonium 37-49X38-57un;
oospore 33-46 X 34-48u; antheridium 15-19 & 8-12u.
Brazil: ot. Phomas island:
The only monoecious representative of the genus with
scrobiculate oospores.
62. Oe. scrobiculatum Wittrock.
(Pl. XXIX, figs. 258 and 259.)
as Wittr. and Nordst. Alg. Exs. No. 1018, 1898; Hirn 1900, p. 1838, Pl. XV,
fig. 90.
Dioecious, macrandrous; oogonium 1-3, obovoid or subellipsoid,
pore superior; oospore of same form as oogonium and nearly filling it,
outer spore wall scrobiculate, inner smooth; antheridium 1—?, sperms 2,
division horizontal; female vegetative cell 16-2450-144u, male
15-19 X45-110u; suffultory cell 21-3034-90yu; oogonium 40-48
60-S88u; oospore 39-45 X48—57u; antheridium 13-15 8-12u.
Ecuador. °
Cf. Oe. verrucosum (No. 63) ea Oe. tiffanit (No. 64).
63. Oc. verrucosum Hallas.
(Pl. XXXI, figs. 272-274.)
1905, p. 408, fig. 17; Hirn 1906, p. 24, Pl. II, fig. 8.
Dioecious, macrandrous; oogonium 1—2, broadly ellipsoid or obovoid-
globose, pore superior; oospore globose or ellipsoid-globose, not filling
oogonium, middle layer of spore wall scrobiculate; suffultory cell tumid;
antheridium 4—?; sperms 2, division horizontal; basal cell elongate;
terminal cell, frequently an oogonium, obtuse; vegetative cell, female
11-26 X45-200u; oogonium 56-68 56-944; oospore 52-64 44-68u;
antheridium 16 X 16u; suffultory cell 19-49 x 30—145y; basal cell 30-35 x
45-160p.
United States: Michigan; Denmark.
Cf. Oe. scrobiculatum above and Oe. tiffanit below. The
antheridial filaments of Oe. verrucosum are very short, usually
consisting only of a holdfast cell and a few antheridial cells.
64. Oe. tiffanii Ackley.
(Pl. XXX, figs. 261-263.)
1929, p. 304, Pl. XXXVI, figs. 15 and 16.
Dioecious, macrandrous; oogonium 1-2, subdepressed-globose or
broadly pyriform-globose, pore superior; oospore globose, nearly filling
3°
4,
Lad
“~,
ae
As
J»,
96 THE OED OGONT AG Eve
oogonium, median layer of spore wall scrobiculate; suffultory cell
enlarged; antheridium 1-7, division horizontal, sperms 2; basal cell
ellipsoid-elongate; vegetative cell 21-22100—-240u; suffultory cell
25-32 X 100-2304; oogonium 64-76X65-69u; oospore 54-65 55-66yu;
antheridium 19-21 X 14—20u.
United States: Michigan (Muskegon Lake).
Oe. tiffanii is to be compared with Oe. scrobiculatum (No. 62)
and Oe. verrucosum above. These three normally have smaller
suffultory cells and are thus separated from Nos. 65-69.
65. Oe. punctatum Wittrock.
(Pl. XXIX, figs. 255 and 256.)
1878, p. 142; De Toni 1889, p. 84; Hirn 1900, p. 132, Pl. XV, fig. 89.
Dioecious, macrandrous; oogonium 1-4, obovoid (rarely globose-
obovoid), pore superior; oospore obovoid, nearly filling oogonium
(rarely subglobose and not filling oogonium), outer spore wall scrobicu-
late; antheridium 1—5, often alternating with vegetative cell; sperms 2,
division horizontal; basal cell elongate terminal cell (often .ocogonium)
apically obtuse; vegetative cell 15-2242-128u; oogonitum 38-45 x
52-65u; oospore 37-43 X 43-55y; antheridium 15-17 X6-10u.
Mexico.
Oe. punctatum, Oe. argenteum (No. 66), Oe. wyliez (No. 67),
and Oe. americanum (No. 68) should be compared in identify-
ing forms with scrobiculate oospores and non-tumid suffultory
cells. They are easily separable on the basis of size.
66. Oc. argenteum Hirn.
(Pl. XXIX, figs. 253 and 254.)
Hirn 1900, p. 289, Pl. VII, fig. 47; Ackley 1929, p. 302.
Dioecious, macrandrous; oogonium 1, obovoid-globose to globose,
pore superior (rarely supramedian); oospore ovoid to globose, outer -
layer of spore wall scrobiculate; antheridia 3-4, sperms 2, division
horizontal; basal cell elongate; female vegetative cell (14—) 20-28
80-160u, male 20-2270-160u; oogonium 44-52X48-62u; oospore
43-48 x 44—50u; antheridium 22 8u.
United States: Michigan; Brazil.
The figure of Oe. argenteum in Pl. XXIX 1s that of Hirn and
represents also one of the variations occurring in the Michigan
material. The outer oospore wall of the alga seen by Hirn
(1900) is undoubtedly scrobiculate. _Ornamentations on ocspore
walls are quite regularly constant for a given species, appearing
definitely on one layer or another. The Michigan specimens
(Ackley 1929) contained oospores whose middle wall layer was
scrobiculate with an apparently smooth and very thin outer
layer. It is perhaps best to include, for the present at least,
OEDOGONIUM 97
only those specimens that conform to the above description.
If it develops that these forms with a middle scrobiculate wall
may also have the outer wall scrobiculate, the description will
have to be emended accordingly. The former had best be
considered a form:
66a. Form michiganese Tiffany nov. f.
Oe. argenteum Hirn (in part) in Ackley 1929, p. 302, Pl. XX XV, fig. 3-6.
Middle wall of oospore scrobiculate; pore of oogonium supramedian;
otherwise as in the type.
United States: Michigan.
67. Oc. wyliei Tiffany.
(Pl. XXX, figs. 264-267.)
1926, p. 90, Pl. I, figs. 1-4.
Dioecious, macrandrous; oogonium 1-4, globose to ovoid, pore
superior; oospore globose to ovoid, filling or not filling oogonium,
outer spore wall irregularly scrobiculate; antheridium 1-4; sperms 2,
division horizontal; basal cell elongate; terminal cell, often an oogonium,
apically obtuse or broadly apiculate; vegetative cell 16-2480-170u;
oogonium 52-64 68-112u; oospore 48-60 X 52-64; antheridium 16-19
xX 8-18.
United States: Iowa, Michigan.
See Oe. punctatum (No. 65).
68. Oe. americanum Transeau.
(Pl. XXXI, figs. 275 and 276.)
1917, p. 231.
Dioecious, macrandrous; oogonium 1, globose to depressed-globose,
pore superior; oospore globose, ellipsoid. globose, or depressed- slobose,
filling oogonium or not, spore wall of three | layers: median layer scrobicu-
late; antheridium. 1-5, frequently alternating with vegetative cell;
sperms 2, division horizontal: basal cell elongate; terminal cell obtuse:
female vegetative cell 28-48 x 40- 100u, male vegetative cell 24— 30%
40-100y; oogonium 40-76 X 48-70; oospore 38— 74X46- —o6u; antheridium
20-28 X4-12y.
United States: Michigan, Illinois.
See Oe. punctatum (No. 65).
69. Oc. taphrosporum Nordstedt and Hirn.
(Pl. XXXI, figs. 270 and 271.)
In Hirn 1900, p. 133, Pl. XVI, fig. 91; Collins 1909, p. 239; P. B. A. No. 813.
Dioecious, macrandrous; oogonium 1-6, obovoid or obovoid- ellipsoid,
pore superior; oospore globose or ellipsoid globose, not filling oogonium,
outer layer of spore wall scrobiculate, inner layer smooth; antheridium
-2-?; terminal cell, sometimes an oogonium, obtuse; basal cell elongate;
98 THe Of pOGONnas On Awe
vegetative cell 25-38 xX 100-375u; oogonium 70-83 X81-113yu; oospore
58-65 X 62-70u; antheridium 24-32 < 8-12u.
United States: Massachusetts, Michigan, Illinois; Brazil;
India; Columbia.
This species is readily recognized by its large size and its
scrobiculate oospore, the latter not filling the oogonium. West
(1914) recorded the alga from Columbia with vegetative cells
19-22u in diameter, and with oogonia and oospores slightly
smaller than the dimensions given above.
70. Oe. pseudacrosporum Wittrock.
(Pl. XXX, figs. 268 and 269.)
In Hirn 1900, p. 193, Pl. XXXII, fig. 196.
Monoecious; oogonium 1, ellipsoid, operculate, division supreme,
lid very small and often deciduous; oospore ellipsoid, completely filling
oogonium, spore wall coalescing with that of oogonium, longitudinally
ribbed, ribs evidently crenulate; antheridium 1-4, hypogynous or sub-
epigynous; sperms 2, division horizontal; basal cell elongate; terminal
cell long, setiform; vegetative cell 9-1332-110u4; oogonium ‘(27-)
32-37 X (40—) 45-56u; antheridium 8-10 6-10uy.
United States: Iowa, Florida; Sweden.
Its monoecious habit, supreme operculum, and ribbed
oospore are characteristic. It should be compared with the
nannandrous Oe. acrosporum (No. 195).
71. Oe. paucocostatum Transeau.
(Pl. XXXII, fig. 277.)
1914, p. 300, Pl. XXVIII, fig. 5; Collins 1918, p. 66; Tiffany 1926, Pl. V, figs.
55 and 56. 2
Dioecious, macrandrous; oogonium 1, ellipsoid, operculate, division
superior; oospore ellipsoid, nearly filling the oogonium, outer wall
smooth, median wall longitudinally ribbed, ribs 15-19 in number, inner
wall smooth; antheridium 2-8, sperms 2, division horizontal; terminal
cell obtuse, basal cell usually elongate; vegetative cell, female (15—) 19-25
70-1604; oogonium 54-60 X 70-104u; oospore 50-56 X 66—-90u; anther-
idium 18-23 x 8-12u.
United States: Illinois, Iowa, Ohio.
7la. Var. gracilis Tiffany.
(Pl. XXXI, fig. 278.)
1921, p. 273; 1926, p. 99.
Somewhat smaller than the species, oospore ellipsoid or occasionally
globose-ellipsoid, completely filling the oogonium or not filling the
oogonium; otherwise similar to the type; vegetative cell 15-20 x 66-120;
oogonium 48-52 x 70-88; oospore 44-48 X 60-704; antheridium 17-20 X
8-12u.
United States: Ohio, Iowa.
OEDOGONIUM 99
Oe. paucocostatum is characterized among the species with
ellipsoid oogonia and longitudinally ribbed oospores by the
~ small number of ribs and by its relatively smaller dimensions.
Its nearest relative is the larger Oe. australianum (No. 72).
72. Oe. australianum Hirn.
(Pl. XXXII, figs. 283 and 284.)
1900, p. 192, Pl. XX XI, fig. 192.
Dioecious, macrandrous; oogonium 1-2, ellipsoid, operculate,
division superior; oospore ellipsoid or globose-ellipsoid, practically
filling oogonium, median layer of spore wall longitudinally ribbed, ribs
17-23, sometimes anastomosing; antheridium to 6-seriate; vegetative
cell 17-22 X 70-170; oogonium 59-74 X 74—96u; oospore 56-70 X 59-74y;
antheridium 14-16 10-15u.
Australia.
Cf. Oe. paucocostatum, above.
73. Oc. tumidulum (Kuetzing) Wittrock.
(Pl. XXXII, figs. 281 and 282.)
1874, p. 35; Conferva tumidula English Botany No. 1670 in Kuetz. Dec. Alg.
No. 60, 1833: Hirn 1900, p. 191, Pl. XX XI, fig. 191.
Dioecious, macrandrous; oogonium 1, subellipsoid, operculate,
division superior; oospore ellipsoid or globose-ellipsoid, quite filling
oogonium, outer layer of spore wall with 40—50 longitudinal ribs granu-
late and sometimes anastomosate, inner layer smooth; antheridiurn to
45-seriate; sperms 2, division horizontal; vegetative cell, female 18-25
65-125u, male 15-20X60-120u; oogonium 52-63X78-90u; oospore
49-58 X61—75u; antheridium 15-20 9-15un.
Germany.
Oe. tumidulum is the only dioecious, macrandrous member of
the genus having the combination of subellipsoid oogonia with
superior pore and more than 40 longitudinal ribs on the oospore.
Cf. the monoecious Oe. insigne (No. 75).
74. Oc. nobile Wittrock.
(Pl. XXXII, fig. 279.)
1874, p. 14; Hirn 1900, p. 189, Pl. XXX, fig. 188.
Monoecious; oogonium 1 (very rarely 2); ellipsoid or subobovoid-
ellipsoid, operculate,. division superior; oospore ellipsoid-globose or
globose, not filling oogonium, spore wall of three layers: outer layer
‘smooth, middle layer with 30-35 continuous longitudinal ribs, rarely
anastomosate, inner layer smooth; antheridium 1-3, hypogynous;
sperms 2, division horizontal; vegetative cell 16-20 x 80—180u; oogonium
57-65 X 67-90u; oospore 48-55 50—-58u; antheridium 15-19X9-13uy.
Norway.
100 THe O28 DOGON ACE AE
74a. Var. minus Hirn.
(Pl. XXXII, fig. 280.)
1900, p. 190, Pl. XXX, fig. 189; Oe. insignis Hirn var. minus Hirn 1895, p. 15.
Larger oospore, ellipsoid, filling oogonium; vegetative cell 13-20
80-240u; oogonium 60-63 85-1004; oospore 56-59X68-80u; anth-
eridium 16-19 X12-17p.
United States: Massachusetts; Finland.
Oe. nobile ts near the larger Oe. insigne (No. 75) and differs
from Oe. tumidulum (No. 73) in being monoecious. The
variety minus sometimes has smaller vegetative cells and always
a larger oospore than the type.
75. Oe. insigne Hirn.
(Pl. XXXIII, fig. 285.)
1895, p. 14, Pl. 1, fig. 2; 1900, p. 191, Pl. XXX and XXXI, fig. 190.
Monoecious; oogonium 1, ellipsoid-obovoid, operculate, division
superior; oospore ellipsoid, quite filling oogonium, spore wall of three
layers: outer smooth, inner longitudinally ribbed, the ribs quite entire,
anastomosate, 40-45 in number, inner smooth; antheridium 1-7,
subepigynous, rarely scattered; sperms 2, division horizontal; vegetative
cell (18—) 25-88 X 75-210u; oogonium 70-78 X 100—120u; oospore 65-75
X88-104y; antheridium 23-27 X 15-23y.
Finland.
Cf. Oe. tumidulum (No. 73) and Oe. nobile (No. 74).
76. Oe. excisum Wittrock and Lundell.
(Pl. XXXIV, fig. 317.)
In Wittr. 1872; p. 3, Pl. 1, figs. 1-4; Hirn 1900, p. 153, Pl. XXIV, fig. 126.
Monoecious; oogonium 1, subconically oblong, medianly plicate
with about 9 longitudinal undulations, operculate, division median and
broad; oospore ellipsoid with a median constriction, not filling oogonium,
spore wall smooth; antheridium 1-2, subepigynous or hypogynous, often
terminal; sperm (?) 1; basal cell subhemispherical; terminal cell apically
obtuse; vegetative cell 83-6 X 14-44y; oogonium 13-15 X 18-26; oospore
9-12 15-18u; antheridium 3-4 6-7; basal cell 8-9 4—5y.
Finland, Sweden, Latvia.
Oe. excisum is one of the very few species of the genus
having an oospore with a median constriction. It is near
Oe. pusillum (No. 221), from which it differs in having undulate
folds in the oogonium.
77. Oe. inversum Wittrock.
(Pl. XXXIII, figs. 295-297. )
1876, p. 47, Pl. 13, figs. 22-24; (?) Oe. monticchu Fiorini-Mazzanti 1860, p. 259,
Pl. 1, figs. 3, 4, 4a, 4b; Hirn 1900, p. 179, Pl. XXVIII, fig. 171; Oe. tnversum Wittr.
var. subclusum Wittr. in Wittr. and Nordst. Alg. Exs. No. 26, 1877; Oe. inversum
Wittr. f. subclusum (Wittr.) Hirn 1900, p. 180, Pl. XXVIII, fig. 172; Heering 1914,
p. 208, fig. 290; Tiffany 1926, p. 95, Pl. VI, figs. 59-62.
OEDOGONIUM 101
Dioecious, macrandrous; oogonium 1, globose, operculate, division
. inferior; oospore globose, quite filling the oogonium, spore wall smooth;
antheridium 1-8; sperm-1; vegetative cell capitellate; basal cell sub-
hemispherical, not elongate; filament not infrequently incrusted with
lime; female vegetative cell 12-14X25-100u, male 9—-11X20-80y;
oogonium (28-) 32-35X30-34u; oospores (27—-) 30-382X27-30u;
antheridium 10-12 9-12u; basal cell 13-20 7-14u.
United States: Iowa; Australia; Austria, France, Germany,
Sweden, Switzerland; Africa.
Easily distinguished among the macrandrous species by the
inferior position of the operculum. It is in some respects
similar to Oe. infimum below. The f. subclusum, according to
the Iowa material (Tiffany 1926), is merely an ecological
variant and is not tenable. The variations of the species
proper include the form.
78. Oc. infimum Tiffany.
(Pl. XXXIII, figs. 289-292.)
1924, p. 183, Pl. II, figs. 6-9; 1926, p. 95, Pl. VI, figs. 59-62.
Dioecious, macrandrous; oogonium 1, globose or subglobose (or the
basal part extended, appearing subpyriform-globose), operculate,
division at the lowest extremity of the oogonium; oospores globose or
subglobose, membrane smooth; male plants a little larger than the
female; antheridium 1-10; sperms 2; vegetative cells distinctly capitel-
late; basal cell of filament subhemispherical, not elongated; filaments
not infrequently incrusted with lime; female vegetative cells 12-18
60-140u, male 16—-2060-140u; oogonium 40-48X41-50u; oospore
40-44 X 38-42u; antheridium 14-208-12u; basal cell 30-42 16-24.
United States: Iowa.
Oe. infimum is the only known member of the genus with the
operculum located at the lowest extremity of the oogonium.
It is further characterized by its evidently capitellate vegetative
cells.
79. Oe. howardii West.
(Pl. XXXIII, fig. 293.)
1904a, p. 281, Pl. 464, figs. 1-5; Hirn 1906, p. 16, Pl. III, fig. 9.
Dioecious, macrandrous; oogonium 1-2, globose (or subglobose),
operculate, division median, distinct; oospore globose (or subdepressed-
globose) filling oogonium; antheridium to 16-seriate, sperm (?) 1; vege-
tative cell broadly capitellate; basal cell subhemispherical, scarcely
elongate; vegetative cell, female 9-1220-44u; male 7-9X16-35y;
oogonium 29-33 X29-33u; oospore 25-29 X25-29u; antheridium 7-9 X
8—14u; basal cell 14-16 10-11.
West Indies: Barbados.
102 THE OF DOCON TNE BOE
79a. Var. minus Tiffany.
(Pl. XXXIII, fig. 294.)
1927, p. 204, Pl. IX, figs. 6 and 7 (as v. minor).
Smaller than the type; vegetative cell 7-9 x 27-48yu; oogonium 26-29
X28-36u; oospore 24—-26X24—-26u; antheridium 7-8X10—-12u; basal
cell 12-14 X 10-12.
United States: Illinois.
Oe. howardi has broadly capitellate vegetative cells as in
Oe. infimum (No. 78) and Oe. inversum (No. 77), but differs
from both in the median position of its operculum. It is
perhaps nearest Oe. latiusculum (No. 81), the latter being
larger and possessing a very wide division of the oogonium.
The variety minus is characterized chiefly by its smaller size
and subspherical basal cell.
80. Oe. pratense Transeau.
(Pl. XXXIV, figs. 298 and 299.)
1914, p. 297, Pl. XXIX, figs. 9-12; Collins 1918, p. 66; Tiffany 1926, p. 96,
Pivstisss l0vand tal:
Dioecious, macrandrous; oogonium 1 (rarely 2), subdepressed-
globose or broadly pyriform-globose, operculate, division median,
narrow but distinct; oospore depressed-globose or subglobose, filling or
nearly filling oogonium, spore wall smooth; antheridium 1-2, usually
alternating with vegetative cell; sperm 1; basal cell elongate; vegetative
cell, female 10—-17X35—-95y, male 8-15X32-82u; oogonium 33-40
35-50; oospore 32-88 X 28-35u; antheridium 10-14 13-18u.
United States: Illinois, Iowa, Ohio, Alabama, Mississippi,
Michigan.
Oe. pratense is distinguished from Oe. latiusculum below by
the narrow opening of the operculum and by its cylindrical
vegetative cells. The latter character together with its larger
size separates it from Oe. howardit (No. 79). The basal cell of
Oe. pratense is uniformly elongate. Among the monoecious
forms it bears some resemblance to Oe. acmandrium (No. 82)
and Oe. psaegmatosporum (No. 83).
Sl. Oe. latiusculum Tiffany.
(Pl. XXXIII, figs. 287 and 288.)
1924, p. 182, Pl. III, figs. 4-6; 1926, p. 96, Pl. VI, figs. 72-74.
Dioecious, macrandrous; oogonium 1-2, globose to ellipsoid-globose;
oogonium operculate, division median, very wide; oospore of the same
form as the oogonium which it very nearly or completely fills, wall
smooth; male plant somewhat larger than the female; antheridium 1,
usually alternating with a single vegetative cell, sperm 1; vegetative
cell distinctly capitellate; basal cell of filament subhemispherical, not
elongated; filament not infrequently incrusted with lime; female veg-
OEDOGONIUM 103
etative cell 10-18X16—-40u, male 14-20*16—-40u; oogonium 382-36
32—40u; oospore 28-32 X 28-34; antheridium 14-18 X 12—20u; basal cell
16-24 X 12-16.
United States: Iowa, Mississippi, Alabama, Kentucky.
The wide operculum, the capitellate vegetative cells, the
single antheridium alternating with a vegetative cell, and the
subhemispherical basal cell are characteristic of the species.
82. Oe. acmandrium Elfving.
(Pl. XXXIV, fig. 300.)
In Hirn 1895, p. 13; Hirn 1900, p. 150, Pl. XXIII, fig. 120.
Monoecious; oogonium 1-2, depressed-globose or subglobose,
operculate, division median and narrow; oospore depressed-globose or
subglobose, filling oogonium, wall smooth; antheridium 1-3, sub-
epigynous, ‘epigynous, or hypogynous, often terminal; sperm single;
basal cell elongate; vegetative cell 7-10X30-80u; oogonium 30-35 x
28-38; oospore 28-33 & 25-29; antheridium 8-10 10-15y.
United States: Illinois; Finland, Sweden; India.
Cf. Oe. pratense (No. 80) and Oe. psaegmatosporum below.
83. Oc. psaegmatosporum Nordstedt.
(Pl. XXXIV, fig. 301.)
1877, p. 24, Pl. 3, fig. 1-3; Hirn 1900, p. 150, Pl. XXIII, fig. 121.
Monoccious; oogonium 1-5, broadly pyriform-globose, operculate,
division median, narrow but distinct; oospore depressed-globose to
globose, inflating the middle part of oogonium, spore wall (?) smooth;
antheridium to 15-seriate, hypogynous, cell a little tumid; sperm single;
vegetative cell 9-10X56-80u; oogonitum 28-33X33-40u; oospore
27-31 X 24-27; antheridium 9-12 6-10up.
- Denmark, Sweden. ;
Near Oe. acmandrium above, differing in its . pyriform-
globose and medianly inflated oogonia and many-seriate
antheridia. ;
84. Oe. minus Wittrock.
(Pl. XXXIV, fig. 302.)
1874, p. 9; Oe. punctato-striatum var. minor Wittr. 1870, p. 123; Oe. spirogranu-
latum Schmidle 1894, p. 43, Pl. 7, fig. 1; Hirn 1900, p. 151, Pl. XXIII, fig. 122.
Monoecious; oogonium 1, pyriform-globose or depressed-globose,
operculate, division median, wide; oospore depressed-globose, not filling
oogonium, spore wall smooth; antheridium to 10-seriate, subepigynous
or subhypognous or rarely scattered, cells a little tumid; sperm 1;
vegetative cell somewhat capitellate; wall of vegetative cell and of
oogonium spirally punctate; basal cell depressed-globose or sub-
hemispherical, wall vertically plicate; vegetative cell 9-13 30-78u;
oogonium 34-46 xk 28—42u; oospore 30-42 < 26-36u; antheridium 9-13 x
3—Om.
104 THE OEDOGONTIACEAE
United States: Massachusetts, Michigan; Finland, Ger-
many, Spain, Norway, Sweden, Latvia, Russia.
Oe. minus is one of the few species of the genus with spirally
punctate vegetative cell and oogonial walls. It is easily
separable from the nannandrous elegans (No. 155) and the
macrandrous punctatostriatum (No. 85) not only by its mono-
ecious habit but also by its size.
85. Oe. punctatostriatum De Bary.
(Pl. XXXIV, figs. 303 and 304.)
1854, p. 47, Pl. 2, figs. 15 and 16; Hirn 1900, p. 152, Pl. XXIII, fig. 128.
Dioecious, macrandrous; oogonium 1, depressed-globose, operculate,
division median, rather wide and distinct; oospore depressed globose,
not filling oogonium, spore wall smooth; antheridium to 10-seriate;
sperm 1; wall of vegetative cell and oogonium spirally punctate; basal
cell depressed-globose or subhemispherical, wall vertically plicate;
female vegetative cell 18-22 38-128y, male 16-19 X 33-108; oogonium
48-55 X38-48u; oospore 40-51 *35—-42u; antheridium 16-19 X6—12y;
basal cell 28-31 x 21-25.
United States: Iowa, Illinois, Florida, Michigan; England,
Finland, France, Ireland, Germany, Norway, Russia, Latvia,
Sweden; Brazil; Greenland; Australia; British Columbia.
Cf. Oe. minus above.
86. Oe. capitellatum Wittrock.
(Pl. XXXIV, fig. 315.)
1874, p. 7; oe eka Wittr. 1870, p. 122, and 1872, p. 23; Hirn 1900, p. 149,
Pl. XXIIL, fiz. 1
ee. oogonium 1, subdepressed or depressed globose,
operculate, division median, narrow but distinct; oospore depressed
globose, completing (or nearly so) oogonium, spore wall smooth;
antheridium 1-2, subepigynous or hypogynous or rarely scattered:
sperm (?) 1; vegetative cell capitellate; basal cell subhemispherical :
terminal cell piliform: vegetative cell 6-9 X20-60yu; oogonium 20-25 x
17-234; oospore 18-23X15-19u4; antheridium 6-7X8-9yu; basal cell
16-18 X6-8y.
United States: Ohio, Illinois, Mississippi, Alabama; British
Columbia; Denmark, Finland, Sweden; Turkestan; Caucasus;
Burma.
Among the species with capitellate vegetative cells it is
characterized by its monoecious habit and small size. It
differs from Oe. quadratum below in the absence of angular-
globose oogonia.
OEDOGONIUM 105
87. Oe. quadratum Hallas.
(Pl. XXXIV, figs. 306-308. )
1905, p. 405, fig. 12; Hirn 1906, p. 19, Pl. III, fig. 10.
Monoecious; oogonium 1-4, angular-globose, operculate, division
median; oospore angular-globose, filling oogonium, spore wall smooth;
antheridium 1, alternating with vegetative cell; vegetative cell capitel-
late; basal cell subhemispherical; vegetative cell 5-12 25-140y;
oogonium 22-28 X 28-33"; oospore 20-26X26u; antheridium 10-12
12—14u; basal cell 7-12 X 6-9un.
Denmark. -
Cf. Oe. capitellatum above.
88. Oe. bohemicum Hirn.
(Pl. XXXVI, fig. 344.)
1900, p. 169, Pl. XXVII, fig. 154; Heering 1914, p. 216, fig. 327; Tiffany 1926,
pelOle Plz PTI. fig. 30.
Monoecious; oogonium 1, globose, operculate, division superior;
oospore globose, filling oogonium, spore walls smooth; antheridium
1-4, subepigynous; sperms 2, division horizontal; vegetative cell cap-
itellate, 10-16X21-66u; oogonium 42-4546-49u; oospore 40-43 x
40-43; antheridium 9-10 5-7.
United States: Iowa; Austria.
This is the largest of the monoecious species combining the
median location of the operculum and the capitellate vegetative
cell. The dimensions above, from the Iowan material, also
include those of the Austrian specimens.
89. Oe. mitratum Hirn.
(Pl. XXXVI, figs. 334 and 335.)
1895, p: 22, Pl. 1, fig. 7; 1900; p. 302, Pl. XXIV, fie. 132.
Dioecious, macrandrous; oogonium 1-4, globose or subglobose,
operculate, division supramedian or superior, narrow but distinct;
oospore globose (rarely subglobose), filling oogonium, spore wall smooth;
antheridium 1—5, subepigynous, sperms 2, division horizontal; vegetative
cell often broadly capitellate; vegetative cell 5-10 18-80u; oogonium
18—24 X 20—-28u; oospore 17—23 X 17—22u; antheridium 6-9 X6-8uy.
United States: Illinois; Austria, Finland, Sweden.
Hirn (1900) records this species as doubtfully monoecious,
but material from Illinois (Transeau) shows it to be definitely
dioecious, macrandrous. The emended description was sup-
plied from the Illinois material. Cf. Oe. petri below.
90. Oc. petri Wittrock.
(Pl. XXXVI, fig. 332.)
1874, p. 6; Hirn 1900, p. 154, Pl. XXIV, fig. 127.
Monoecious; oogonium 1 (rarely 2), pyriform or pyriform-globose,
operculate, division a little above median; oospore subdepressed or
106 THE -O EBD OGOMIACEAE
depressed-globose, filling oogonium, spore wall smooth; antheridium
1-2, hypogynous or epigynous or subepigynous; sperm 1; basal cell
elongate; terminal cell apically obtuse; vegetative cell 6-7 32—48u;
oogonium 21-24 22-29y; oospore 20-23 X 16-19u; antheridium 5-7 X
9-11.
Germany, Spain, Sweden; Ceylon.
91. Oe. trioicum Woronichin.
1923, p. 99.
Dioecious macrandrous, or monoecious; oogonium 1-3, sometimes
terminal, ellipsoid, operculate, division superior; oospore ellipsoid or
subovoid, spore wall smooth, faintly violet; antheridium 1-6, hypogy-
nous in monoecious filament, scattered or terminal in male filament;
terminal cell obtusely rounded; basal cell attenuate; male plants
130-330 long; vegetative cell 4—5 x 12-22u; oogonium 25-27 x 138-16y;
oospore 20-21 X 14y; antheridium 4X 3uy.
Near Baku, in Azerbaijan (west coast of the Caspian).
This plant according to Woronichin is both dioecious,
macrandrous and monoecious, in this respect similar to Oe.
varians (No. 10). It should be compared with the macrandrous
pringsheimit (No. 95) and the monoecious gracillimum (No. 114).
Unfortunately no figure is available.
92. Oc. welwitschii West and West.
(PI. XXXVI, figs. 351 and 352.)
1897, p. 5; Hirn 1900, p. 174, Pl. XXVIII, fig. 162; Tiffany 1926, p. 97, Pl. IV,
figs. 41 and 42.
Dioecious, macrandrous; oogonium 1-38, subovoid-globose, opercu-
late, division superior; oospore globose, filling or not filling oogonium, .
spore wall smooth; antheridium 2; female vegetative cell 20-28 X 25-84,
male 17-20 X 35-80y; oogonium 43-50 X 43-52y; oospore 35-43 X 35—-42y;
antheridium 16-18 X 7—9u.
United States: Iowa, Illinois, Alabama; Africa.
This species is near Oe. iowense below, but differs in having
at once both larger vegetative cells and smaller oogonia. It
may be near the imperfectly known dioicum (No. 94) and is
larger than Oe. pringsheimii (No. 95).
93. Oc. iowense Tiffany.
(Pl. XXXVII, figs. 353-355. )
1924, p. 181, Pl. III, figs. 1-3; 1926, p. 97, Pl. VI, figs. 69-71.
Dioecious, macrandrous; oogonium 1-2, globose, or ellipsoid-globose,
operculate, division superior; oospore of the same form as the oogonium,
which it completely fills or not, spore wall smooth; antheridium 1-25,
sperms 2, division horizontal; basal cell of filament commonly elongated;
vegetative cell 10-16X44-100u; oogonium 52-60X60-80u; oospore
45-56 X 50-644; antheridium 10-12 10-20y; basal cell 16-24 60-80y.
OEDOGONIUM 107
United States: Iowa, Ohio, Kentucky.
This species is easily recognized by the considerable difference
between the diameter of the vegetative cells and that of the
relatively much larger oogonia. Its oogonia are larger than
those of Oe. welwitschit above.
94. O6ce. dioicum Carter.
(Pl. XXXVII, figs. 356 and 357.)
1858, p. 30, Pl. 3, figs. 1-2, 5-8, 18-16; Hirn 1900, p. 175, Pl. XXVIII, fig. 163.
Dioecious, macrandrous; oogonium 1, obovoid-globose, operculate,
division superior; oospore globose, not filling oogonium, spore wall
smooth; male plants a little smaller than female; antheridium 10-20,
sperms (?) 2, division vertical; female vegetative cell about 32 80—-110x,
male about 28 70—-95u; oogonium about 82 92u.
India.
No data beyond those of Carter are available, and Oe.
dioicum is retained here largely because it cannot be definitely
discarded upon our present knowledge of the species.
95. Oe. pringsheimii Cramer; Wittrock.
(Pl. XXXV, figs. 325 and 326.)
Cramer 1859, p. 17, Pl. 1, fig. C 1-4; Wittr. 1870, p. 185; Wittr. 1874, p. 33,
Pl. 1, figs. 16 and 17; Hirn 1900, p. 170, Pl. XX VII, fig. 155; Oe. pachydermatos porum
Nordst. 1878, p. 21, Pl. 2, fig. 18-15; Oe. pringsheimi Cram.; Wittr. var. Nordstedtiu
Wittr. f. pachydermatosporum (Nordst.) Hirn 1900, p. 173, Pl. X XVII, fig. 160;
Collins 1909, p. 246; Heering 1914, p. 202, fig. 284; Tiffany 1926, p. 98, Pl. V, figs.
45 and 46.
Dioecious, macrandrous; oogonium 1—6, subovoid-globose, opercu-
late, division superior; oospore globose, nearly filling oogonium, spore
wall smooth, often thickened; antheridium to 10-seriate, often alter-
nating with vegetative cell; sperms 2, division horizontal; basal cell
elongate, terminal cell broadly apiculate or obtuse; female vegetative
cell 14-20 X 28-100u, male 12-16 24—-64y; oogonium 35-43 x 36—-46y;
oospore 30-37 X 30-87; antheridium 10-15 6-9u.
United States: Iowa, New York, Pennsylvania, Florida,
Ohio, Utah; Africa, Afghanistan; Australia; Austria, Denmark,
England, Finland, Italy, Norway, Latvia, Sweden, Switzerland.
95a. Var. abbreviatum Hirn.
(Pl. XXXV, fig. 331.)
1900, p..173, Pl. XX VII, fig. 161.
Smaller; vegetative cell broader; oogonium 1, obovoid-globose,
nearly filled by oospore; vegetative cell 10-1315-39u; oogonium
28-32 X 30-35; oospore 27-30 X 27-30y.
Brazil.
108 THE OEDOGONIACEAE
95b. Var. nordstedtii Wittrock,
(Pl. XXXV, figs. 327-330. )
In Wittr. and Nordst. Alg. Exs. No. 8, 1877; Oe. ciliare De Notaris 1868, p. 120;
Oe. franklinianum Wittr. in Tilden Amer. Alg. No. 2, 1894; Oe. nordstedtii Wittr.
1872, p. 6, Pl. 1, figs. 7 and 8; Oe. pringsheimii var. varians Nordst. 1888, p. 11, Pl. 1,
fig. 9; Oe. pachydermatosporum Nordst. in Lewin 1888, p. 18, Pl. 3, fig. 56; Hirn
1900, p. 171, Pl. XXVII, figs. 156-158; Oe. pringsheimit Cram.; Wittr. var. nord-
stedtur Wittr. f. euganeorum (Wittr.) Hirn 1900, p. 172, Pl. X XVII, fig. 159; Oe.
euganeorum Wittr. 1874, p. 39; Tiffany 1926, p. 98, Pl. V, fig. 47.
Smaller than the type, oogonium 1-2; oospore not filling oogonium;
female vegetative cell 10-1620-76yu, male 9-15X18-68y; oogonium
28-39 X 36—45u; oospore 26-34 x 27-34u; antheridium 9-12 8-9u.
United States: Minnesota, California, Iowa, Illinois, Ohio,
Michigan; Austria, England, Finland, Latvia, Germany, Italy,
Switzerland, Spain; India; Patagonia; Greenland; Samoa.
Oe. pringsheimit is characterized by its subovoid-globose
oogonia and superior position of the operculum, among the
dioecious species. Its oogonia are smaller than either Oe.
towense (No. 93) or Oe. welwitschit (No. 92). The variety
abbreviatum has shorter vegetative cells and var. nordstedti
is more slender than the type.
96. Oe. nodulosum Wittrock.
(Pl. XXXIX, figs. 374 and 375.)
1872a, p. 22, Pl. 1, figs. 8-10; 1874, p. 13, Pl. 1, figs. 2 and 3; Borge 1899, p. 6,
Pl. 1, fig. 3; Hirn 1900, p. 187, Pl. X XIX, fig. 184.
Monoecious; oogonium 1-2, obovoid-globose or more rarely obovoid-
ellipsoid, operculate, division superior; oospore globose or subglobose or
more rarely globose-ellipsoid, nearly filling oogonium, spore wall smooth,
often thick; antheridium 1-3, subepigynous or hypogynous; sperms 2, ~
division horizontal; basal cell elongate, not constricted; terminal cell
obtuse or apiculate; vegetative cell, with two undulate constrictions,
20-29 < 30-140u; oogonium 48-57 X56-73u; oospore 46-53 49-56u;
antheridium 18-25 7-9u.
Australia; China; Patagonia; England, Sweden.
96a. Var. commune Hirn.
(Pl. XXXIX, fig. 376.)
1900, p. 187, Pl. XXX, fig. 185; Oe. nodulosum Wittr. in P. B. A. No. 74, 1895,
and im Hirn 1895, p. 138; Collins 1909, p. 248.
Oogonium subobovoid-ellipsoid to ellipsoid or more rarely globose-
ellipsoid; vegetative cell 22-2935-140u; oogonium 64-74 70-90y;
oospore 56-70 X67-80u; antheridium 18-26 X7-10uy.
United States: Massachusetts; Finland, Sweden.
The nodulose character of the vegetative cells is very
distinctive. Oc. sphaerandrium (No. 105) sometimes has nodu-
lose cells, but it is much smaller. Var. commune has larger
OEDOGONIUM 109
oogonia and oospores. Oe. undulatum (No. 119), anannandrous
species, has vegetative cells four times undulate-constricted
while Oe. nodulosum has two undulate constrictions.
97. Oe. porrectum Nordstedt and Hirn.
(Pl. XXXVIII, figs. 361 and 362.)
In Hirn 1900, p. 186, Pl. X XIX, fig. 183.
Dioecious, macrandrous; oogonium 1, oblong, operculate, division
superior; oospore ellipsoid or globose-ellipsoid, not filling oogonium
longitudinally, spore wall smooth; antheridium to 4-seriate; sperms 2,
division horizontal; female vegetative cell 7-1025-55y, male 6-9
25-62u; oogonium 24-27 X 44-53; oospore 23-24 X 25-28u; antheridium
6-7 X6-8u.
Brazil.
98. Oe. nanum Wittrock; Tiffany.
(Pl. XXXVI, figs. 342 and 343.)
7 poe 1874, p. 37; Hirn 1900, p. 305, Pl. X XIX, fig. 174; Tiffany 1926, Pl. VI,
gs. —Do.
Dioecious, macrandrous; oogonium 1-8, ovoid to broadly ellipsoid,
operculate, division superior; oospore ovoid to globose-ellipsoid, usually
filling the oogonium, spore wall smooth; antheridium 1-3, sperm 1;
basal cell subhemispherical; terminal cell, often an oogonium, apically
obtuse; vegetative cell, often irregularly swollen, 6-1015—-33u;
oogonium 24-28 x 30-364; oospore 21-27 X 23-380y; antheridium 7—-10X
8-llyu; basal cell 14-17 X 12-16u.
United States: Iowa; India.
Originally found in India, this species was only completely
described from the Iowan material. It bears some resemblance
to Oe. pisanum below. It is found almost entirely epiphytic
on submerged leaves, on Pithophora, on Cladophora, and on
other species of Oedogonium.
99. Oe. pisanum Wittrock.
(Pl. XXXVIII, figs. 363 and 364.)
1876, p. 50, Pl. 13, fig. 28; Oe. subpisanum Lewin 1888, p. 17, Pl. 3, figs. 49-52;
ae 1900, p. 181, Pl. XXIX, fig. 175; Heering 1914, p. 203, fig. 291; Tiffany 1926,
p. 97.
Dioecious, macrandrous; oogonium 1 (rarely 2-3), ellipsoid-ovoid to
ovoid, operculate, division superior; oospore ovoid to ellipsoid, nearly
filling oogonium, spore wall smooth; antheridium 1-4; sperms 2, division
horizontal; basal cell elongate; terminal cell piliferous; vegetative cell
5-12 12-72; oogonium 23-29 (-32) «34-43 (-45)u; oospore 21-25 X
27-37; antheridium 4-9 X 5-9u.
United States: Iowa, Illinois, Ohio, Mississippi; Austria,
Italy, Spain; Africa.
110 Lie © PDOGORerA CELE
99a. Var. gracilis Transeau and Tiffany.
(Pl. XXXVIII, figs. 365 and 366.)
1919, p. 241; Tiffany 1926, p. 98, Pl. III, figs. 31-34.
Oogonium and oospore ellipsoid to ellipsoid-ovoid; vegetative cell,
female 6-9X18-48u, male 5-8X16-45yu; oogonium 16-20 20-30u;
oospore 15-18 X 18-28u; antheridium 5-7 X5-10y.
United States: Iowa, Illinois, Mississippi.
The combination of small size, elongate basal cell, and
piliferous terminal cell is sufficient to characterize the species.
The presence of subhemispherical basal cells in Oe. nanum
(No. 98) easily separates it from Oe. pisanum. The variety
gracilis is smaller. Often epiphytic on other species of algae.
100. Oc. pyriforme Wittrock.
(Pl. XXXVI, fig. 348.)
1874, p. 39; Hirn 1900, p. 303, Pl. XXV, fig. 137.
Monoecious; oogonium 1, pyriform, operculate, division superior;
oospore pyriform, filling or not filling oogonium, spore wall smooth;
antheridium 1-3, subepigynous, epigynous, hypogynous, or scattered;
sperms 2, division horizontal; vegetative cell 13-16 X48—90u; oogonium
40-46 X (44-)48-60u; oospore 36-4236-44y; antheridium 10-12
8-12u.
Tasmania; British Columbia.
The pyriform oogonium is characteristic. The dimensions
of Oe. pyriforme separate it from Oe. simplex (No. 102) and Oe.
pyrulum (No. 103). Originally found in Tasmania, the above
complete description 1s furnished from material collected in
British Columbia by Mr. G. H. Wailes.
101. Oe. gunnii Wittrock.
(Pl. XXXIV, fig. 318.)
1874, p. 37; Hirn 1900, p. 298, Pl. XXIII, fig. 119.
Monoecious; oogonium 1-4, subdepressed- or depressed-globose,
operculate, division median, narrow but distinct; oospore same form as
oogonium and filling it, spore wall smooth, outer layer thick and hyaline,
inner brown; antheridium subepigynous; vegetative cell 6-9 X30-85y;
oogonium 23-29 X 19-294; oospore 22-27 X 17—23u; antheridium 6 X 12u.
United States: Alabama; Australia.
Material collected in Alabama by Professor E. N. Transeau
shows Oe. gunnii to be definitely monoecious. Its distinctly
narrow median division of the oogonium separates it from the
imperfectly known Oe. poecilosporum (No. 224).
OEDOGONIUM aaa
102. Oe. simplex Hirn.
(PI. XXXVI, fig. 340.)
1900, p. 158, Pl. XXIV, fig. 135.
Monoecious; oogonium 1, obovoid-pyriform, operculate, division
superior; oospore globose, ellipsoid or obovoid-globose, not filling
oogonium, spore wall smooth; antheridium 1—?, subepigynous; sperms 2,
division horizontal; vegetative cell 11-13X35-58y; oogonium 26-32
33-40u; oospore (22—) 24-80 23-30u; antheridium 8-10 7-10u.
Brazil:
Cf. Oe. pyriforme (No. 100).
103. Oc. pyrulum Wittrock.
(Pl. XXXVI, fig. 349.)
1872, p. 2; Hirn 1900, p. 158, Pl. XXV, fig. 136.
Monoecious; oogonium 1, globose-pyriform, operculate, division
superior; oospore subdepressed-globose or subglobose, not filling
oogonium, spore wall smooth; antheridium 1, epigynous or hypogynous
or rarely subepigynous; basal cell elongate; terminal cell apically
broadly acute; vegetative cell 8-11 30-75y; oogonium 30-33 X 31-385y;
oospore 26-29 X 24—28y; antheridium 8-9 X 10—11p.
Sweden; Ceylon.
108a. Var. amplius W. R. Taylor.
(Pl. XXXVII, fig. 350.)
1928, p. 107, Pl. 18, figs. 1-4 (as v. amplior).
Larger oogonium; vegetative cell 9-12 40-64; oogonium 34-40
30-44; oospore 26—28 X 26—-28y, not filling oogontum; antheridium sub-
epigynous 10X6uz.
British Columbia.
Oe. pyrulum is separated from the species of the genus
having pyriform or subpyriform oogonia largely by dimensions.
The variety amplius has larger oogonia than the type and more
nearly approaches the size of Oe. pyriforme (No. 100).
104. Oe. loricatum Hirn.
(Pl. XXXVI, fig. 339.)
1895, p. 22, Pl. 1, fig. 6; 1900, p. 156, Pl. XXIV, fig. 133.
Monoecious; oogonium 1 (rarely 2), subpyriform-globose, sometimes
subglobose, operculate, division superior; oospore subglobose or sub-
depressed-globose, quite filling oogonium, spore wall smooth;
antheridium 1-2, subepigynous; sperms 2, division horizontal; vegetative
cell 8-11 30-75u; oogonium 23-28 X23-40u; oospore 22-26 XK 21-24y;
antheridium 7-8 X 5-7.
Finland.
This species is similar to Oe. pithophorae (No. 106) below,
but the latter has globose and slightly larger oospores.
EO THE OEDOGONIACEAE
105. Oe. sphaerandrium Wittrock and Lundell.
(Pl. XXXVI, fig. 337.)
In Wittr. 1874, p. 7; Oe. subcapitellatum Hirn 1895, p. 13, Pl. 1, fig. 1; Hirn 1900,
p. 155, Pl. XXIV, figs. 129 and 130; Borge 1913, p. 31, fig. 2.
Monoecious; oogonium 1-4, subpyriform- to subdepressed-globose,
operculate, division a little above median; oospore subdepressed- or
depressed-globose, nearly filling oogonium, spore wall smooth,
antheridium to 6-seriate, subepigynous or scattered; sperm 1; vegetative
cell capitellate, sometimes nodulose; basal cell subhemispherical,
terminal cell piliform; vegetative cell 4-10 X6—40u; oogonium 18-23 <
18-23; oospore 16-21 14-19; antheridium 6-8 X 5-6u.
Austria, Finland, Germany, Sweden; Siberia.
The capitellate (sometimes nodulose) vegetative cells, the
small size, and supramedian operculum are characteristic.
106. Oc. pithophorae Wittrock.
(Pl. XXXVI, fig. 338.)
1878, p. 141; Hirn 1900, p. 157, Pl. XXIV, fig. 134.
Monoecious; oogonium 1, pyriform-globose, operculate, division
superior; oospore globose, almost filling oogonium, spore wall smooth,
often thickened; antheridium 1—?, subepigynous; basal cell elongate;
vegetative cell 9-11X24-48y; oogonium 26-30X27-35yu; oospore
25-29 X 24-29u; antheridium 8—10X7—9u.
St. Thomas, West Indies.
Epiphytic on Pithophora cleveana Wittrock.
Cf. Oe. porrectum (No. 97).
107. Oe. autumnale Wittrock.
(Pl. XXXVI, fig. 341.)
1874, p. 11; Hirn 1900, p. 167, Pl. XXVI, fig. 151.
Monoecious; oogonium 1, obovoid-globose, operculate, division
superior; oospore globose or subglobose, completing oogonium (or nearly
so), spore wall smooth; antheridium 1-2, subepigynous, hypogynous, or
scattered; sperms 2, division horizontal; basal cell elongate; terminal
cell broadly apically acute; vegetative cell 16-2025—-50u; oogonium
39-45 X45—-51u; oospore 37-42 X 37-44; antheridium 15-18 X9-10y.
United States: Pennsylvania; Finland, Italy, Sweden, Latvia.
Cf. Oe. crisbum (No. 109).
108. Oe. obesum (Wittrock) Hirn.
(Pl. XXXVII, fig. 347.)
1900, p. 166, Pl. XXVI, fig. 148; Oe. pyrulum Wittr. var. obesum Wittr. 1876,
p. 44, Pl. 18, fig. 20.
Monoecious; oogonium 1, obovoid-globose, operculate, division
superior; oospore globose, not quite filling oogonium, spore wall smooth,
often thickened; antheridium 1-2, subepigynous or more rarely sub-
OEDOGONIUM yas
hypogynous; sperms 2, division horizontal; vegetative cell 12-15x
35-75u; oogonium 40-43 X 38-44; oospore 33-35 X 33-85y; antheridium
11-14X 10-15z.
United States: Massachusetts; Austria, Bulgaria, Finland,
France; Ceylon; Brazil.
Cf. Oe. crispum (No. 109).
109. Oe. crispum (Hassall) Wittrock.
(Pl. XXXV, fig. 319.)
Vesiculifera crispa Hass. 1845, p. 203, Pl. 52, fig. 8; Oe. crispum Wittr. 1874,
p. 10; 1876, p. 45; Oe. rostellatum Pringsh. 1858, p. 69, Pl. 5, fig. 1; (?) Vestculifera
vernalis Hass. 1848, p. 434; (?) V. candollei Hass. 1845, p. 208, Pl. 52, fig. 9; Oe.
vernale Wittr. 1874, p. 10; Oe. crispum (Hass.) Wittr. var. elongatum Wittr. 1876,
p. 45; Oe. hispanicum Lewin 1888, p. 16, Pl. 2, figs. 40-42; Hirn 1900, p. 159, Pl.
XXV, figs. 188 and 139; Oe. crispum (Hass.) Wittr. f. vernale (Hass.; Wittr.) Hirn
1900, p. 161, Pl. XXV, fig. 141; Heering 1914, p. 214, fig. 334; Tiffany 1926, p. 101,
Pl. III, fig. 29.
Monoecious; oogonium usually 1, obovoid-globose, operculate,
division superior; oospore globose or subglobose, quite filling the
oogonium, spore wall smooth; antheridium 1—5, subepigynous or hypogy-
nous; sperms 2, division horizontal; basal cell elongate, terminal cell
apically obtuse; vegetative cell (10—) 12-16 X35-80u; oogonium 37-45 x
41—53u; oospore 35-43 X37-43y; antheridium 8-14 7-12u.
United States: Colorado, Pennsylvania, California, Michi-
gan, Mississippi, [linois, Ohio, Iowa, Alaska; Austria, England,
Denmark, Finland, France, Germany, Italy, Spain, Sweden;
Africa; Asia; Australia; Bolivia; Patagonia; Greenland; Van-
couver, British Columbia.
109a. Form granulosum (Nordstedt) Hirn.
(Pl. XXXV, fig. 322.)
1900, p. 162, Pl. XXV, fig. 142; Oe. crispum (Hass.) Wittr. var. granulosum
Nordst. 1877, p. 24; De Toni 1889, p. 37.
Oogonium subglobose, filled by oospore; antheridium subepigynous;
spore wall of oospore punctate-granulate; vegetative cell 14-17
35-63y; oogonium 40-43 x 42—45u; oospore 37-40 X 37—40u; antheridium
11-13 8-11.
Sweden.
109b. Form inflatum Hirn.
(Pl. XXXV, fig. 323.)
1900, p. 161, Pl. XXV, fig. 140; Oe. vesicatum Link var. flavescens Kuetz. in
Rabenh. Alg. Sachs. No. 271, 1853; Oe. rostellatwm Pringsh. in ibid. No. 2275, 1872.
Oogonium obovoid-globose; vegetative cell 12-16 X35—-95y; oogonium
40-50 X 45-53; oospore 37-45 X 38—-45u; antheridium 8-12 *9-12u.
United States: Michigan, Florida, Mississippi; Switzerland,
Sweden, Germany; South Africa.
114 THE. OEDOGONTACEAE
109c. Var. gracilescens Wittrock. |
(Pl. XXXV, fig. 321.)
In Wittr. and Nordst. Alg. Exs. No. 509, 1883; Oe. Lagerheimii Wittr. in ibid.
No. 1018, 1893; Hirn 1900, p. 162, Pl. XXV, fig. 148; P. B. A. No. 518.
More slender than the type; oogonium varying from obovoid-
globose to subellipsoid; oospore globose to ovoid; vegetative cell 10-14
30-70u; oogonium 33-39 < 33-51u; oospore 32-37 X 33-42u; antheridium
9-10 X 7-9.
United States: Massachusetts, Iowa, Missouri, Ohio, Illinois,
Mississippi, Louisiana, Minnesota; Austria; Brazil; Morocco,
Angola.
109d. Var. hawaiense Nordstedt.
(Pl. XXXV, fig. 320.)
1878, p. 20, Pl. 2, figs. 9 and 10; Hirn 1900, p. 165, Pl. XXVI, fig. 147.
Oogonium subobovoid-globose to pyriform-globose, not filled by
oospore; terminal cell mucronate or shortly setigerous; vegetative cell
10-16 X 20-64; oogonium 30-388X31-88u; oospore 27-32 27-33y;
antheridium 8-11 6-8u.
Hawail.
109e. Var. uruguayense Magnus and Wille.
(Pl. XXXV, fig. 324.)
In Wille 1884, p. 39, Pl. 2, fig. 63; Oe. crispum (Hass.) Wittr. f. gracilis in Wittr.
and Nordst. Alg. Exs. No. 704, 1886; Hirn 1900, p. 164, Pl. XXVI, fig. 145; Oe.
crispum (Hass.) Wittr. var. uruguayense M. & W. f. proprium Hirn 1900, p. 164,
Pl. XXVI, fig. 146.
Oogonium subobovoid-globose, usually filled by oospore; antheridium
subepigynous or hypogynous or scattered; vegetative cell 10-14
16-5lu; oogonium 30-88 X 30-45y; oospore 27-35 X 27-374; antheridium ~
8-13 X 6-12p.
United States: Pennsylvania; Argentina, Brazil.
Oe. crispum is perhaps the commonest monoecious member
of the genus among the operculate forms. Its vegetative cells
are more slender than those of Oe. autumnale (No. 107) and there
is less variation in the relative size of its oogonium and oospore
than in Oe. obesum (No. 108). The forms and varieties of the
species are separable from one another and the type largely
on the basis of relative shapes and sizes of vegetative and
reproductive cells. (See key).
110. Oe. rupestre Hirn.
(Pl. XXXVI, fig. 345.)
1900; pz 168) sR. XexaVay fie. 1522
Monoecious; oogonium 1, suboboviform-globose, operculate, division
superior; oospore globose, not filling oogonium, spore wall smooth;
antheridium 1-3, subepigynous or hypogynous; sperms 2, division
OEDOGONIUM, 115
horizontal; vegetative cell 20-27 26-674; oogonium 48-58 x48-60y;
oospore 43-50 (-54) 43-50 (—54)u; antheridium 18-22 9-11.
Austria, France, Ireland, Latvia.
110a. Form pseudautumnale Hirn.
(Pl. XXXVI, fig. 346.)
1900, p. 169, Pl. X XVII, fig. 153.
A little smaller; vegetative cell 20-25 30-65u; oogonium 44-49
45-55u; oospore 43-47 X48-47u; antheridium 19-22 10-14u.
United States: Mississippi; France, Germany.
Oe. rupestre has larger vegetative cells than any of the
other monoecius operculate species with obovoid-globose to
subglobose oogonia. It is to be compared with Oe. crisbum
(No. 109). F. pseudautumnale has smaller fruiting cells than”
the type.
111. Oe. ahlstrandii Wittrock.
(Pl. XXXVIII, fig. 358.)
In Wittr. and Nordst. Exs. No. 401, 1882; Hirn 1900, p. 183, Pl. XXIX, fig. 179;
Collins 1909, p. 247.
Monoecious; oogonium 1, ellipsoid, operculate, division superior;
oospore ellipsoid, filling oogonium, wall smooth; antheridium 1-2,
hypogynous; sperms 2, division horizontal; terminal cell apically
obtuse; vegetative cell 10-18X30-180u; oogonium 35-42 57-69u;.
oospore 34-41 X53-62u; antheridium 13-17 X9-12u.
United States: New York; Sweden, England.
The large oogonium of this species separates it from all
other ellipsoid, operculate, monoecious forms, except the still
larger Oe. pachydermum, below.
112. Oe. pachydermum Wittrock and Lundell.
(Pl. XXXIX, figs. 377 and 378.)
In Wittr. 1870, p. 125; Hirn 1900, p. 188, Pl. XXX, fig. 187.
Monoecious; oogonium 1 (rarely 2), ellipsoid, operculate, division
superior, wall frequently thickened; oospore ellipsoid, not filling
oogonium, spore wall smooth; antheridium 1-3, hypogynous or sub-
epigynous, often terminal; sperms 2, division horizontal; basal cell
elongate; terminal cell apiculate; vegetative cell 21-2734-120y;
oogonium 50-70 75-100u; oospore 40-60 * 50-80u; antheridium 18-21
X 10-12u.
Finland, Sweden.
Cf. Oe. ahlstrandiut (No. 111).
116 ia) OE DOIG ON EAC EAE
113. Oe. kirchneri Wittrock.
(Pl. XXXVIII, fig. 371.)
F ae p. 104; Oe. alternans Kirch. 1878, p. 53; Hirn 1900, p. 183, Pl. XXIX,
Ze i
Monoecious; oogonium 1, ellipsoid or obovoid-ellipsoid, operculate,
division superior; oospore of same form as oogonium, nearly filling
oogonium, spore wall smooth; antheridium 1-2, hypogynous and
alternating with oogonium; sperms 2, division horizontal; terminal cell
obtuse; vegetative cell 8-15x16-60u; oogonitum 20-2434 -48y;
oospore 19-23 X 32-41; antheridium 9-13 X4—7u.
Germany.
Chiefly characterized among those with ellipsoid, operculate
oogonia by the alternation of oogonium and antheridium.
114. Oe. gracillimum Wittrock and Lundell.
(Pl. XXXVIII, fig. 373.)
In Wittr. 1874, p. 15; Wolle 1887, p. 74, Pl. 75, fig. 2; Hirn 1900, p. 184, Pl.
XXIX, fig. 180; Collins 1909, p. 247; Heering 1914, p. 218, fig. 318; Tiffany 1926,
p.100; Piva eg. 9.
Monoecious; oogonium 1, oblong, operculate, division superior;
oospore oblong-ellipsoid, not filling oogontum, spore wall smooth;
antheridium 1; sperms 2, division horizontal; basal cell elongate;
vegetative cell 4-7 x 16-42y; oogonium 14-19 X 34—40y; oospore 13-17 X
' 24-32u; antheridium 3-5 X4-7n.
United States: Iowa, Pennsylvania, Michigan, Illinois, Ohio,
Mississippi, Kentucky; Sweden; Angola.
114a. Form majus West and West.
1897, p. 4; Hirn 1900, p. 184.
Vegetative cell 6-7X20-40u; oogonium 20-2332-35u; oospore
17 X24u.
Africa.
Oe. gracillimum almost invariably has some oogonia with
imperfectly developed oospores.
115. Oe. oblongellum Kirchner.
(Pl. XXXVIII, fig. 372.)
In Hirn 1900, p. 182, Pl. X XIX, fig. 177.
Monoecious; oogonium 1, ellipsoid-obovoid, operculate, division
superior; oospore ellipsoid, nearly filling oogonium, spore wall smooth;
antheridium 1-2, hypogynous or scattered; sperms 2, division hori-
zontal; terminal cell obtuse; vegetative cell 7-9X 14—-35yu; oogonium
20-24 & 25-33u; oospore 18-22 X 24-30yu; antheridium 6-8 X4—12u.
United States: Illinois, Mississippi; Germany; Burma.
Oe. oblongellum is near Oe. oblongum, below, but the latter
almost invariably has oogonia not filled lengthwise by oospores;
the former has oogonia nearly completely filled.:
OEDOGONIUM tity
116. Oe. oblongum Wittrock.
(Pl. XXXVIII, fig. 367.)
1872, p. 2; 1874, p. 15; Hirn 1900, p. 185, Pl. X XIX, fig. 181; Heering 1914,
p. 218, fig. 319: Collins 1918, p. 66; Tiffany 1926, Oe INO, JEN, INU sakeg, AAS
Monoecious; oogonium 1, oblong, operculate, division superior;
oospore ellipsoid to ovoid, not filling oogonium longitudinally, spore
wall smooth; antheridium 1-3, sperms 2, division horizontal; basal cell
elongate; vegetative cell 6-11X20-86u; oogonium 20-2641-60y;
oospore 19-23 X 30-36u; antheridium 6—9 X 7-9u.
United States: Iowa, Illinois, Mississippi; Siberia; New
Caledonia; India; Austria, Denmark, Finland, Germany, Russia,
Norway, Latvia, Sweden.
116a. Form majus (Nordstedt) Hirn.
(Pl. XXXVIII, fig. 370.)
1900, 185, Pl. XXIX, fig. 182; Oe. oblongum Wittr. var. majus Nordst. in
Wittr. 1876, Ds 45, JPAL, 1B}, anise, 2all
Vegetative cell 8-11X35-75u; oogonium 26-28 42-50u; oospore
22-26 X 31-34; antheridium 8-9 X9-10u.
United States: Michigan; Finland, Italy, Sweden; Morocco.
116b. Form sphaericum (Hallas) Hirn.
(Pl. XXXVIII, figs. 368 and 369.)
1906, p. 18, Pl. III, fig. 12; Oe. sphaericum Hallas 1905, p. 406, fig. 13.
Oospore globose; vegetative cell 6-11 20-85u; oogonium 21-28
30-52u; oospore 16-26 X 16-26; antheridium 8X6; basal cell 9X 72u.
Denmark.
Cf. Oe. oblongellum (No. 115). The f. sphaericum is easily
separated from the species by its globose oospore; f. majus
has slightly larger oogonia.
117. Oe¢e. itzigsohnii De Bary.
(Pl. XXXIX, figs. 379 and 380.)
1854, p. 56, Pl. 3, figs. 29-32; Wittr. 1870, p. 123; Oe. platygynum Wittr. in
Eichler 1893, p. 2, Pl. 9, fig. 2; Hirn 1900, p. 177, Pl. XXVIII, fig. 167.
Monoecious; oogonium 1, ellipsoid, with median, conically obtuse
projections, appearing stellate in vertical view, with 7—10 radiations,
operculate, division inframedian; oospore globose, not completing
oogonium, spore wall smooth; antheridium 1-2; terminal cell apically
obtuse or apiculate; vegetative cell 8-10 25-60u; oogonium 34-40
32—40u; oospore 20-23 & 20-23u; antheridium 8-9 X 8-15u.
United States: Massachusetts; Germany, Poland, Sweden,
Austria, England, Bulgaria, Denmark, Latvia, Russia, France.
118 THE OEDOGONIACEAE
117a. Form heteromorphum Hirn.
(PI. XXXIX, fig. 381.)
1900, p. 178, Pl. XXVIII, fig. 168.
Processes on oogonium intermediate between conically obtuse
projections and mammiform protuberances; vegetative cell 6-9X
30-110u; oogonium 33-40 35-40y; oospore 20-25 x 20-25n.
Germany, Sweden.
= 117b. Var. minus West.
(Pl. XXXIX, fig. 382.)
1893, p. 97; 1897, p. 4; Hirn 1900, p. 178, Pl. XXVIII, fig. 169.
Smaller; processes of oogonium acutely rounded; vegetative cell
5-7 X 25-70u; oogonium 28-30 X 28-30u; oospore 16-20 X 16—20y.
England.
Oe. itzigsohnii is near Oe. mammiferum below, but differs in
having conically obtuse projections, instead of mammiform
projections, on the oogonia. Var. minus is slightly smaller
than the type and f. heteromorphum has oogonial projections
somewhat intermediate between the species proper and Oe.
mammiferum.
118. Oe. mammiferum Wittrock; Nordstedt.
(Pl. XXXIX, figs. 383-385. )
- Wittr. 1874, p. 16; Nordst. 1877, p. 25, Pl. 3, figs. 4-6; Oe. huillense Wesi 1897,
p. 5, Pl. 365, figs. 7 and 8; Hirn 1900, p. 175, Pl. XXVIII, figs. 165 and 166.
Monoecious; oogonium 1 (rarely 2-3), ellipsoid, with mammiform
projections appearing as 7-9 radiations seen vertically, operculate,
division inframedian, very narrow; oospore globose or subdepressed- .
globose (rarely depressed-globose), not filling oogonium, spore wall
smooth; antheridium 1, subepigynous; basal cell elongate; vegetative
cell 5-8 X20-56u; oogonium 20-28 X20-30u; oospore 12-17 (-20) Xx
12—16u; antheridium 6X 7u.
United States: Massachusetts; Norway, Sweden; India;
Africa. :
Cf. Oe. ttzigsohni above.
119. Oe. undulatum (Brebisson) Al. Braun; Wittrock.
(Pl. XLII, fig. 407. )
Conferva undulata Breb.; Oe. undulatum Al. Braun in De Bary 1854, p. 94;
Wittr. 1870, p. 130; Cymatonema confervaceum Kuetz. 1849, p. 375 and 1853, p. 15,
Pl. 47, fig. 1; Borge 1899, p. 4, Pl. 1, fig. 2; Oe. undulatum A. Br. var. interrupte-
incisum Schroeder 1897, p. 10, Pl. 2, fig. 1; Oe. sp. Moebius 1894, p. 320, Pl. 1, fig.
21; Oe. undulatum A. Br. var. Moebiusii Schmidle 1896, p. 297, Pl. 9, fig. 1; Oe.
undulatum (Breb.) Al. Br. var. Moebiusii Schmidle in Borge 1896, p. 5; Hirn 1900, -
p. 257, PI. XLV, figs. 272-275. :
Dioecious, nannandrous, gynandrosporous or idioandrosporous;
oogonium 1-2, subglobose or ellipsoid-globose, operculate, division
inferior, wide; oospore globose or subglobose, quite filling oogonium,
OEDOGONIUM 119
spore wall smooth, sometimes thick; androsporangium to 7-seriate;
vegetative cell undulate (4 undulate constrictions); basal cell elongate,
not undulate; terminal cell (sometimes oogonium) apically obtuse;
dwarf male elongate-obconic, usually on suffultory cell, rarely on other
vegetative cell near oogonium, antheridium interior; vegetative cell
15-22 45-1104; oogonium 48-56X50-75u; oospore 42-50 42-52
(-60)u; androsporangium 15-21X7-14y; dwarf male 8-10X48-65
(—70) u.
United States: Michigan, Florida, Indiana; Uruguay; Aus-
tralia; Manchuria, China; Austria, England, Finland, -France,
Germany, Norway, Poland, Sweden, Russia, Latvia; Columbia;
Africa (Victoria).
119a. Var. americanum Transeau.
(Pl. XLII, fig. 408.)
1917, p. 232.
Vegetative cell as in type; oogonium much larger; vegetative cell
15-22 X 45-110u; oogonium 58-68 x 60-80; oospore 48-60 X 48-56y.
United States: Michigan.
119b. Form senegalense (Nordstedt) Hirn.
(Pl: XLII, fig. 409.)
1900, p. 261, Pl. XLV, figs. 276 and 277; Oe. undulatum (Breb.) A. Br. var.
senegalense Nordst. 1880, p. 138; P. B. A. No ees
Oogonium and oospore smaller than the type; dwarf male shorter;
oogonium to 5-seriate; vegetative cell with three median swellings
repand, the terminal swelling entire, 15-22 45-110u; oogonium 42-52 x
44-63; oospore 37-44 K 36-44; androsporangium 15-19X9-18u; dwarf
male 6-8 X 37-44u.
United States: Massachusetts; Africa: Senegal.
The undulate vegetative cells are characteristic. It bears
some relation in the vegetative state to Oe. nodulosum (No. 96).
The var. americanum has considerably larger oogonia than the
.type and f. senegalense has slightly smaller fruiting cells. A
number of variations of this species are on record in algological
literature, but the two above seem the only really tenable ones
outside the species proper.
120. Oe. nebraskense Ohashi.
(Pl. XLII, figs. 410-413. )
Oe. nebraskensis Ohashi 1926, p. 213, figs. 1-20.
Dioecious, nannandrous, gynandrosporous; oogonium 1-4, flask-
shaped or obovoid, pore supramedian; oospore subspherical or ovoid, not
quite filling oogonium, outer layer of spore wall smooth, middle layer
punctate, inner layer smooth; androsporangium 1-4, basal cell elongate;
terminal cell attenuate-obtuse; dwarf male curved, on suffultory cell,
120 LHE OE DOIGONTACEAE
antheridium exterior, 1-4; vegetative cell slightly capitellate; filament
20-41 (-50) celled; vegetative cell, terminal 9-12170-805yu, median
20-27 X 57—160u, basal 22-35 X 79-230; suffultory cell 41-58 X 93-130,;
oogonium 60-67X70-79u; oospore 53-64 60-76u; androsporangium
20-25 X 2240u; dwarf male stipe 12-1947-68u; antheridium 9-13
17-20u.
United States: Nebraska (near Lincoln).
The only nannandrous species combining the characters of
supramedian pore and punctate oospore.
121. Oe. aster Wittrock.
(Pl. XLII, fig. 416.)
1872, p. 4; 1874, p. 29; De Toni 1889, p. 62; Hirn 1900, p. 198, Pl. XXXII, fig.
202; Fremy and Meslin 1926, p. 124, fig. 9.
Dioecious, nannandrous; oogonium 1, subdepressed-globose, pore
median; oospore subdepressed-globose or subglobose, not completely
filling oogonium; outer layer of spore wall echinate; suffultory cell
sometimes a little swollen; terminal cell obtuse; dwarf male a little
curved, on suffultory cell, stipe sometimes 2-celled, antheridium exterior,
1-2; vegetative cell 7-13 X50-110y; oogonium 33-35 X 34-39; oospore
(with spines) 31-32 X 25-30; dwarf male stipe 6—7 X 20-25; antheridium
5-6 X 7-8y.
United States: Illinois; Sweden,-Germany, Latvia, France;
Ceylon.
Oe. aster is near Oe. pugens (No. 125) but the latter is larger
in all dimensions.
122. Oe. hystricinum Transeau and Tiffany.
, (Pl. XLII, fig. 414.)
1919, p. 240, Pl. XIV, figs. f-i; Tiffany 1926, p. 102, Pl. VIII, figs. 85 and 86.
Dioecious, nannandrous, idioandrosporous; oogonium 1, globose or
somewhat obovoid, pore median; oospore globose to subglobose, nearly
filling the oogonium, outer spore wall densely covered with spines;
suffultory cells swollen; androsporangium 3-6; terminal cell obtuse;
basal cell elongated; dwarf male nearly straight, resting on the suffultory
cell, antheridium exterior, 1; female vegetative cell 8-15 x 42-100y, male
6-9 X 50-67; suffultory cell 16-19 42-70u; oogonium 30-40 X 36-53. ;
oospore (including spines) 23-38 X28-43u; androsporangium 6-8 X
8—15u; dwarf male stipe 6-10 X 20-32u; antheridium 5-6 X 6—10y.
United States: Illinois, Iowa.
This species is near Oe. hystrix, below, but differs in its
smaller size and in its swollen suffultory cells.
123. Oe. hystrix Wittrock.
(Pl. XLII, fig. 417.)
1870, p. 133; Wolle 1887, p. 87, P1. 84, fig. 8; Hirn 1900, p. 213, Pl. XXV, fig. 218.
Dioecious, nannandrous, gynandrosporous (or possibly idioan-
drosporous); oogonium 1, ellipsoid, pore median; oospore ellipsoid,
OED OGONTUM LT
nearly filling oogonium, outer spore wall echinate; androsporangium
_ 1-3; terminal cell obtuse; dwarf male slightly curved, on suffultory cell;
antheridium exterior, 1; vegetative cell 17-2830-120u; oogonium
38-48 X 45-654; oospore 37-46 43-554; androsporangium 17-18
13-18; dwarf male stipe 10-11 X 22—25n; antheridium 6-8 X9-14y.
United States: Pennsylvania; Finland, Germany, Sweden.
123a. Var. canadense Tiffany.
(Pl. XLII, fig. 418.)
1929, p. 74; Oe. hystrix Wittr. in Skuja 1927, p. 99, Pl. II, fig. 13.
Pore inframedian; suffultory cell enlarged; vegetative cell 14-25
80-125u; suffultory cell 24-3064-72u; oogonium 40-53 52-64y;
oospore 38-48 X 40-60u; androsporangium 16-20 15-30y; antheridium
7-8 X 8-14u; dwarf male stipe 9-12 28-40u.
British Columbia ; Latvia.
123b. Var. subglobosum Wittrock.
(Pl. XLII, fig. 419.)
1872a, p. 22, Pl. 1, fig. 7; Hirn 1900, p. 214, Pl. XX XV, fig. 219.
Smaller; oogonium and oospore subglobose; vegetative cell 17-21
35-93u; oogonium 36-3841-43u; oospore 34-3639-40u; andro-
sporangium 16-18X9-14y; dwarf male stipe 1023u; antheridium
tex Ups:
Sweden.
The species is to be compared with Oe. hystricinum (No. 122).
The variety canadense differs from the type in its inframedian
pore and slightly swollen suffultory cell; var. subglobosum is
smaller with subglobose oogonium.
124. Oe. echinospermum Al]. Braun.
(Pl. XLIII, figs. 420 and 421.)
In Kuetzing 1849, p. 366; Kuetzing 1853, p. 12, Pl. 36, fig. 2; Wittr. 1870, p. 129;
Hirn 1900, p. 199, Pl. XX XIII, fig. 204; P. B. A. No. 1673.
Dioecious, nannandrous, gynandrosporous or idioandrosporous;
oogonium 1, ellipsoid-globose or subglobose, pore median; oospore
globose, quite filling oogonium, outer layer of spore wall echinate;
androsporangium 1—5; dwarf male a little curved, on suffultory cell,
antheridium exterior, 1-2; vegetative cell 18-3045-130u; oogonium
39-50 X 41-57; oospore (with spines) 38-47 X 38—-49u; androsporangium
21-25 X9-15u; dwarf male stipe 10-15 26-—35y; antheridium 6-12
6-L5y.
United States: Illinois, Ohio, Alabama, Mississippi, Massa-
chusetts, New York, New Jersey, Pennsylvania, Michigan;
Austria, Scotland, England, Germany, Latvia, Finland, France,
Sweden; Australia; British Columbia.
E22 THE OEDOGONIACEAE
124a. Var. horridum Hirn.
(Pl. XLII, fig. 422.)
1900, p. 201, Pl. XX XIII, fig. 205; Oe. echinospermum A. Br. var. Wolle 1887,
p. 86, Pl. 85, figs. 6-S.
Larger with longer and more dense spines; antheridium pluri-
cellular.
United States: Florida.
The species is one of the most easily recognized among the
nannandrous forms by its echinate oospore, median pore, and
large dimensions (as compared with Oe. hystrix, Oe. aster, and
Oe. pungens). The variety horridum has no record other than
that of Wolle, and its retention in the genus is open to con-
siderable question.
125. Oe. pungens Hirn.
(Pl. XLIV, figs. 423 and 424.)
1900, p. 199, Pl. XXXII, fig. 203. j R
Dioecious, nannandrous, gynandrosporous; oogonium 1, _ sub-
depressed-globose (or nearly subglobose), pore median or a little above
median; oospore subglobose, almost filling oogonium, outer spore wall
echinate; androsporangium |—?, hypogynous; dwarf male a little curved,
on suffultory cell, antheridium exterior, 1-2; vegetative cell 12-16
50-94u; oogonium 40-48 & 40—50u; oospore (with spines) 37-44 X 35—48y;
androsporangium 14-1610-15u; dwarf male stipe 9-12 20-80n;
antheridium 6-7 X 8—12u.
United States: South Carolina, Illinois.
Cf. Oe. aster (No. 121).
126. Oe. exospirale Tiffany.
(Pl. XLIV, figs. 425 and 426.)
1924, p. 184, Pl. II, figs. 1-8; 1926, p. 102, Pl. IX, figs. 100-102.
Dioecious, nannandrous, idioandrosporous; oogonium 1 (rarely 2),
subglobose or obovoid-globose (rarely subhexagonal), pore median;
oospore globose or subglobose, nearly filling the oogonium, spore wall
of two layers: outer layer marked by 5-8 spiral ribs uniting at the poles,
the polar axis always placed in a transverse position, never parallel
with the filament, the inner layer smooth; suffultory cell swollen;
androsporangium 1-6; basal cell elongate; dwarf male a little curved,
situated on the suffultory cell, with exterior antheridium 1—3; vegetative
cell 8-1260-88u; suffultory cell 16-2860-88u; oogonium 40-44
44-484; oospore 32-38X38-40u; androsporangium 12-16 14-20p;
dwarf male stipe 14-16 X30-40y; antheridium 8-12 X 14-16n.
United States: Iowa, Ohio, Mississippi. °
This species should be compared with Oe. spirale (No. 128)
and Oe. illinoisense (No. 127). It differs from the former in
having smaller oogonia and oospores and in its tumid suffultory
OEDOGONIUM £23
cells; it is separated from the latter on the basis of smaller
dimensions.
127. Oc. illinoisense Transeau.
(Pl. XLIV, figs. 431-433. )
- 1914, p. 299, Pl. XXIX, figs. 6-8.
Dioecious, nannandrous, gynandrosporous; oogonium 1, sub-
. globose to obovoid-globose, pore median; oospore globose or subglobose,
nearly filling oogonium, outer spore wall with 4-7 spiral ribs, uniting
at poles, polar axis always transverse to axis of filament; suffultory
‘cell enlarged; androsporangium 1-5; basal cell elongate; dwarf male
slightly curved, on suffultory cell; antheridium exterior, 1-4; vegetative
cell 13-18 X80-140u; suffultory cell 32-40 50-80u; oogonium 51-60
60-70u; oospore 45-56X48-664; androsporangium 13-17 17—-22u;
dwarf male stipe 14-17 37—57y; antheridium 9-12 15—-238u.
United States: Illinois, Mississippi, Kentucky.
Cf. Oe. exospirale, above.
128. Oe. spirale Hirn.
(Pl. XLIV, figs. 427 and 428.)
1900, p. 201, Pl. XX XIII, fig. 206.
Dioecious, nannandrous, idioandrosporous; oogonium 1, subglobose
or obovoid-globose, pore median; oospore globose or subglobose, not
filling oogonium, spore wall double: outer layer with 4-7 spiral ribs,
anastomosate, united at the poles, inner layer smooth; androsporangium
1-3; basal cell elongate; dwarf male a little curved, near oogonium,
antheridium exterior, 1; vegetative cell 20-33 40-130u; oogonium
52-60 X52-60u; oospore 46-5646-56u4; androsporangium 17-22
11-14y; dwarf male stipe 11-16 41-59; antheridium 10-11 18—20z.
Asia (Java).
128a. Var. acutum West and West.
(PI. XLIV, fig. 430.)
1902, p. 128, Pl. 17, figs. 3-5; Hirn 1906, p. 22, Pl. III, fig. 14.
Spiral ribs larger, irregularly and acutely dentate; vegetative cell
20-26 X70-106u; oogonium 46-56 54-60; oospore 37-45% 3745p;
dwarf male stipe 9-12 34-44; antheridium 8-9 x 14—-18u.
United States: Mississippi; Ceylon, India.
128b. Var. latviense Tiffany.
Pl. XLIV, fig. 429.)
1929, p. 75; Oe. spirale Hirn f. in Skuja 1927, p. 102, Pl. II, fig. 14 a-b.
Pore supramedian or superior; vegetative cell 16-2065—-120y;
oogonium 49-6065u; oospore (without ribs) 35-45x35—-45y, not
filling oogonium, outer wall with 5-6 spirally arranged ribs; dwart
male 12 50u. 432
Latvia.
124 ree Ol DICK ON TEANGA AGE:
The species should be compared with Oe. exospirale (No. 126).
The variety acutum has smaller oospores and larger ribs;
var. latviense has a distinctly above-median pore which is
sometimes nearly superior.
129. Oc. depressum Pringsheim.
(Pl. XLVI, fig. 446.)
1858, p. 69, Pl. 5, fig. 5; Hirn 1900, p. 249, Pl. XLII, fig. 261.
Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2),
depressed globose, pore median; oospore depressed globose, not filling
oogonium; androsporangium 2-celled; dwarf male oblong-obovoid, on
oogonium, antheridium interior; vegetative cell 8-9 x 25-54; oogonium
28 X 26u; oospore 23 X 17-18u; dwarf male 4—5 x 14-16u.
Germany; Greenland.
Cf. Oe. semiapertum, below.
130. Oe. semiapertum Nordstedt and Hirn.
(Pl. XLVI, fig. 445.)
In Hirn 1900, p. 250, Pl. XLIT, fig. 262.
Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2),
subhexagonal-globose to subpyriform-globose, pore median, rimiform,
extending nearly half way round the oogonium; oospore globose or sub-
globose, not filling oogonium, spore wall smooth; androsporangium 1-3,
hypogynous or subepigynous; terminal cell apically obtuse; dwarf
male subobovoid, on oogonium, antheridium interior; vegetative
cell 9-12 X38-105yu; oogonium 32-35 X 33-40u; oospore 25-29 x 25-30;
androsporangium 9-10 10-14y; dwarf male 8-9 Xx 14—15n.
French Guiana.
This species and Oe. depressum, above, are the smallest of
nannandrous, medianly poriferous members of the genus having
smooth and nearly globose oospores. Oe. depressum is separated
by its smaller size and non-rimiform pore.
131. Oc. gallicum Hirn.
(Pl. XLVII, fig. 453.)
NI ay p. 197, Pl. XXXII, fig. 201; Oe. flavescens Hass. in Roumeguere Alg. Exs.
IN'O:: fo.
Dioecious, nannandrous, (?) idioandrosporous; oogonium 1-2,
subhexagonally globose, pore a little above median; oospore of same
form as oogonium and quite filling it, spore wall smooth; dwarf male
suberect, on suffultory cell (rarely oogonium), antheridium exterior,
1-2; vegetative cell 17-22 51-120u; oogonium 43-48 x 44-54; oospore
41-46 X39-44y; dwarf male stipe 11-16 26-80yu; antheridium 8-9X
(1 1p.
France.
Cf. Oe. braunii, below.
OEDOGONIUM 125
132. Oe. braunii Kuetzing; Pringsheim.
ae XLVI, fig. 458.)
Kuetzing 1849, p. 366; 1853, 12, Pl. 36, fig. 3; Pringsheim 1858, p. 70, Pl.
5, fig. 6; Wolle 1887, ie ce), Jell 79, Gee. 6 and 7; Oe. calcareum Cleve var. gaditanum
Lewin 1888, iy dks JE, Si, sales, Gas Hirn 1900, p. 194, Pl. XXXII, fig. 197; Collins
1909, p. 249: Heering 1914, De 172; Tiffany 1926, p. 102.
Dioecious, nannandrous, gynandrosporous; oogonium 1, ovoid to
subglobose, pore median; oospore globose, not filling oogonium, spore
wall smooth; androsporangium 1-2; basal cell elongate; terminal cell
apically obtuse; dwarf male usually on suffultory cell, stipe somewhat
curved; antheridium exterior, 1; vegetative cells 13-15 25-60y;
suffultory cell 16-20X28-50u; oogonium 380-37 33-43"; oospore
27-33 X 27-334; androsporangium 13-15X11-12u; dwarf male stipe
7-12 X 20-28; antheridium 5-8 9-10u.
United States: Iowa, Illinois, New Jersey, Pennsylvania,
Michigan; Austria, England, Denmark, Finland, France, Ger-
many, Spain, Ireland, Latvia, Norway, Sweden; Africa; British
Columbia.
132a. Var. hafniense (Hallas) Hirn.
(Pl. XLVII, figs. 460-462.)
1906, p. 10, Pl. III, fig. 13; Oe. hafniense Hallas 1905, p. 398, fig. 1.
A little smaller; idioandrosporous; oospore globose or angular-
globose; vegetative cell 12-15X25-60y; oogonium 23-30 28-35y;
oospore 21—28 X 21-284; dwarf male stipe 6-812-21u; antheridium
Cope:
Denmark.
132b. Var. zehneri Tiffany.
(Pl. XLVII, fig. 459.)
1927, 95 204, Pil EX fig. 2.
Somewhat larger in all dimensions; oospore ovoid; vegetative cell
12-24 34-72u; suffultory cell 21-32X48-52u; oogonium 40-50
48-60; oospore 3444%X36-50u; dwarf male stipe 8-10 16-24u;
antheridium 7-8 X 8-12u.
United States: Indiana.
The species is near, but smaller than, Oe. gallicum (No. 131)
and Oe. flavescens, below. Var. hafniense is smaller than the
type and is idioandrosporous; var. zehnerit is somewhat larger
than the species and has ovoid oospores.
133. Oc. flavescens (Hassall) Wittrock).
(Pl. XLIX, fig. 471.)
(?) Vesiculifera flavescens Hass. 1845, p. 206, Pl. 53, fig. 9; Oe. flavescens Wittr.
1870, p. 127; Oe. flavescens (Hass.) Wittr. var. gynandrosporum Hirn 1895, p. 16;
Hirn 1900, p. 196, Pl. XXXII, figs. 199 and 200; Collins 1909, p. 249; Heering 1914,
p. 174, fig. 232; Tiffany 1926, p. 103, Pl. IX, fig. 95.
Dioecious, nannandrous, idioandrosporous or gynandrosporous;
oogonium 1, ellipsoid-globose to subglobose, pore median; oospore
126 THE QEDOGONIACEAE
globose, not quite filling oogonium, spore wall smooth; androsporangium
1-9; dwarf male somewhat curved, on the suffultory cell; antheridium
1-2; vegetative cell 18-23 X72-140y; oogonium 49-52 X 51-60; oospore
45-49 X45-49u; androsporangium 17-208-18u; dwarf male stipe
11-12 36—45y; antheridium 9-10 X 15-20u.
United States: Ohio, Mississippi, Alabama, Massachusetts,
Minnesota, Iowa; England, Sweden, Finland.
Cf. Oe. braunit (No. 1382).
134. Oe. manschuricum Skvortzow.
(Pl. XLVI, fig. 442.)
1926, p. 434, fig. &.
Dioecious, nannandrous; oogonium 1, globose, pore supramedian;
oospore globose or nearly so, not quite filling oogontum, outer spore
wall echinate; dwarf male broadly egg-shaped, unicellular, on oogonium;
vegetative cell 14-17X56-85u; oogonium 30-31X37-38y; oospore
26-28 X 26-30u; dwarf male 13-24 X 20-87u.
North Manchuria.
Characterized by its echinate oospores and supramedian
pores. To be compared with Oe. hystricinum (No. 122) and
Oe. echinospermum (No. 124).
135. Oe. sexangulare Cleve.
(Pl. XLVII, fig. 454.)
In Wittr. 1870, p. 131; Wolle 1887, p. 82, Pl. 79, figs. 8 and 9; Oe. hexagonum
Kuetz. i1 Roumeguere Alg. Exs. No. 294 and Oe. vestcatum Link f. fuscescens Dupray
in loc. cit. No. 687; Hirn 1900, p. 211, Pl. XX XV, fig. 216; P. B. A. No. 1679.
Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2), ~
sexangular-ellipsoid, pore a little above median; oospore same form as
oogonium and nearly filling it, spore wall smooth; suffultory cell some-
times slightly tumid; androsporangium 1-3; dwarf male on suffultory
cell, a little curved, stipe of 2-3 cells, antheridium exterior, 1; vegetative
cell 9-16 X30-110u; oogonium 29-33 X 33-394; oospore 27-31 X31-36y;
androsporangium 13-14X10-14u; dwarf male stipe 7-9X21-30,;
' antheridium 6-7 X 9-12uy.
United States: Indiana, Mississippi, New York, Louisiana,
Pennsylvania, Kentucky, Michigan; Austria, France, Norway,
Sweden.
135a. Var. angulosum (Hallas) Hirn.
(Pl. XLVU, figs. 455 and 456.)
1906, p. 21, Pl. III, fig. 17; Oe. angulosum Hallas 1905, p. 402, fig. 7.
Smaller, oospore not filling oogonium; vegetative cell 10-14 15-54y;
oogonium 19-30 30-42u; oospore 17—28X21-30u; dwarf male stipe
6-7 X 18-21u; antheridium 6X 7u.
Denmark.
OEDOGONIUM 1
135b. Var. majus Wille.
(Pl. XLVI, fig. 457.)
1880, p. 68; Hirn 1900, p. 212, Pl. XXV, fig. 217.
Larger, pore median; vegetative cell 15-2330-68u; oogonium
36-42 (-48) x (36-) 41-45; oospore 34-40 X39-43yu; androsporangium
14-18 X8-10yu; dwarf male stipe 7-9 X 18-30u; antheridium 6-8 X6-10y.
United States: Mississippi, Massachusetts; Austria, Finland,
- Germany, Norway, Sweden.
The species is readily identified among the nannandrous
forms by its sexangular-ellipsoid oogonia and oospores. Var.
angulosum is smaller and var. majus is larger than the species.
136. Oc. stellatum Wittrock.
' (Pl. XLV, fig. 441.)
1870, p. 129; 1874, p. 27, Pl. 1, fig. 15; (2) Oe. spinos permum Reinsch 1875, p. 81,
Pi 15; fig: 1- Hirn 1900, p. 205, Pl: XOGXTV,, fig. 210:
Dioecious, nannandrous, gynandrosporous; oogonium 1-3, obovoid-
globose, pore superior; oospore globose, quite filling oogonium, outer
spore wall with 4—7 somewhat spirally arranged ribs, appearing definitely
‘dentate on the margin, sometimes anastomosate; androsporangium 1-3,
usually subepigynous; basal cell elongate; terminal cell slender, sub-
hyaline, apically obtuse; dwarf male suberect, on suffultory cell,
antheridiumi 1—2; vegetative cell 15-35 40-225u; oogonium 51-64
56-70u; oospore (with ribs) 50-58 X50-58y; androsporangium 14-19
13—20u; dwarf male stipe 11-13 X 45-52y; antheridium 6-9 X 8-13u.
United States: Alabama, Florida; Africa; Brazil; Australia;
| Finland, Germany, Italy, Sweden; Ceylon.
This alga is often placed with the species having spirally
arranged ribs on the oospore. The ribs are really irregular
rows of dentate spines, and I have thus separated it in the key.
137. Oc. silvaticum Hallas.
(Pl. XLIX, fig. 472.)
1905, p. 404; fig. 9; Hirn 1906, p. 21, Pl. III, fig..16.
Dioecious, nannandrous, gynandrosporous; oogonium 1, ellipsoid-
globose, pore superior; oospore globose, not filling oogonium; suffultory
cell subtumid; dwarf male suberect, on suffultory cell, antheridium
exterior; vegetative cell 12-15%65-120u; suffultory cell 2060,;
oogonium 3750p; oospore 28X28u; androsporangium 7X 17u; dwarf
male stipe 1139u; antheridium 7 X7u.
Denmark.
In general appearance this species resembles Oe. flavescens
(No. 133), but differs in its smaller size and superior pore. The
suffultory cells are not nearly so much enlarged relatively as
in Oe. borisianum, below.
128 THE OE DOGONTAGE AE
138. Oc. borisianum (Le Clerc) Wittrock.
(Pl. XLVIII, fig. 469.)
1874, p. 25: Prolifera borisiana Le Clerc 1817, p. 475, Pl. 23, fig. 6; Oc. borisianum
Wittr. 1870, p. 182; Vesiculifera aurea Hassall 1842, p. 392; V. borisstz Hassall 1845,
p- 201, Pl. 52, fig. 7; Oe. apophysatum Al. Braun in Kuetzing 1849, p. 366, and 1853,
p. 12, Pl. 35, fig. 5; Oe. setigerum Vaupell 1859, p. 17, Pl. 1. (2) Androgynia mirabilis
Wood 1872, p. 196, Pl. 18, fig. 2; Oe. birmanicum Wittrock 1874, p. 24; Hirn 1900,
p. 217, Pl. XXXVI, fig. 223; Collins 1909, p. 255; Heering 1914, p. 178, fig. 243;
Tiffany 1926, p. 103, Pl. VIII, fig. 87; P. B: A. No. 517.
Dioecious, nannandrous, gynandrosporous or idioandrosporous;
oogonium 1—5, obovoid or quadrangular-ellipsoid, pore superior; oospore
ovoid to obovoid (often quadrangular-ovoid), not filling oogonium,
spore wall smooth; androsporangium 1-7, usually in the upper part of
the filament; basal cell elongate; terminal cell, often an oogonium,
broadly apiculate, obtuse, or sometimes setiferous; dwarf male, some-
what curved, on suffultory cell; antheridium 2; vegetative cell 15-23 x
45-140u; suffultory cell 31-88 x 50-92y; oogonium (33-) 40-50 55—90u;
oospore 35-46 X48-60u; androsporangium 16-19 X 15-234; dwarf male
stipe 12-18 X 35-47; antheriditum 7-10 X 11-16n.
United States: Iowa, Massachusetts, Utah, Michigan, Cali-
fornia, Illinois, Ohio, Pennsylvania; British Columbia; Austria,
England, Denmark, Finland, France, Germany, Spain, Sweden,
Latvia; Brazil, Columbia, Paraguay; Australia; India; South
Africa.
138a. Var. westii Tiffany and Brown.
(Pl. XLVIII, fig. 470.)
In Tiffany, 1929, p. 74; Oe. borisianum (Le Cl.) Wittr. in West 1903, p. 36.
Larger dimensions throughout; vegetative cell 17-19 X 130-180y;
suffultory cell 31-42 105-168u;. oogonium 53-60X67-88u; oospore.
49-58 X49-58u; antheridium 17X12-13p.
United States: Michigan, Mississippi; England.
Oe. borisianum is one of the commonest nannandrous
species. It is easily identified by the striking difference in
size between the cells above the oogonia and the suffultory
cells. F. westiz is larger than the type.
139. Oe. alternans Wittrock and Lundell.
(Pl. XLVITII, fig. 463.)
In Wittr. 1874, pp. 20; Hirn 1900, p. 251, Pl. XLIT, fig. 263.
Dioecious, nannandrous, gynandrosporous; oogonium 1, subglobose,
often alternating with vegetative cell, pore superior; oospore globose,
filling oogonium, wall smooth, often thick; suffultory cell often sub-
tumid; androsporangium 1-2, subepigynous or epigynous; basal cell
elongate; terminal cell obtuse; dwarf male oblong, with an inferior
constriction, on suffultory cell; vegetative cell 21-35 45-160u; sufful-
tory cell 26-40 52-160yu; oogonium 65-80X65—-86u,; oospore 59-75 X
59-75; androsporangium 18-25X16-25y; dwarf male 12-17 X38—46u.
OEDOGONIUM 129
Sweden.
Readily characterized by its short barrel-shaped vegetative
cells, often alternating with oogonia.
140. Oc. kitute G.S. West.
1907, p. 98.
Dioecious, nannandrous; oogonium 1-2, subglobose or obovate-
globose, pore superior; oospore globose, not filling oogonium, spore wall
smooth; terminal cell obtuse; dwarf male elongate, slightly curved,
smaller below, situated on oogonium or suffultory cell; antheridium
interior (?); vegetative cell 26 130-180u; oogonium 76-78 x 75-80y;
oospore 72X72u; suffultory cell 44 132u; dwarf male 12-13 x 58-66u.
Africa.
West has left no figure for this species. It is to be com-
pared with Oe. borisianum (No. 138) and Oe. silvaticum (No.
ae
141. Oe. victoriense G. S. West.
(Pl. XLIX, fig. 473.)
In Hardy 1906, p. 22; West 1909, p. 47, Pl. 6C.
Dioecious, nannandrous, gynandrosporous; oogonium 1, ellipsoid-
globose to ellipsoid-doliiform, pore superior; oospore exactly globose, not
filling oogonium, spore wall smooth; androsporangium 5-6 celled;
dwarf male on suffultory cell, stipe curved, antheridia 2; suffultory
cell broadly dilated; vegetative cell 25-29 x 50-87; oogonium 49 X 57y;
oospore 39X39u; androsporangium 25-26 4-8y; antheridium 7-8
4—5uy. ;
Africa (Victoria).
Resembles Oe. crassiusculum, below, but has single oogonia,
nearly exactly globose oospores, and smaller oogonia.
142. Oe. crassiusculum Wittrock.
(Pl. XLIX, fig. 474.)
1870, p. 132, 1874, p. 24; Cooke 1884, p. 162, P1. 60, fig. 5; Hirn 1900, p. 215.
Dioecious, nannandrous, gynandrosporous; oogonium 1-2, globose-
obovoid or subglobose, pore superior; oospore ellipsoid-globose or
globose, spore wall smooth and thickened, quite filling oogonium;
androsporangium 2-5; dwarf male suberect, on or near suffultory cell,
antheridium exterior, 1-?; vegetative cell 27-3095-105y; oogonium
54-60 X60-75u; oospore 51-57X52-63y; androsporangium 26-28 x
10—-18y; dwarf male 13X60y; antheridium 7-9 x 9-16y.
United States: Ohio, Mississippi, Connecticut; Australia;
England, Sweden.
UO TEE OF DIOeO NEN CB AGE:
142a. Var. arechavalete (Wittrock) Hirn.
(Pl. L, fig. 478.)
1900, p. 216, Pl. XXXVI, fig. 222; Oe. arechavalete Wittr. in Wittr. and Nordst.
Exs. 1886 and in De Toni 1889, p. 55.
(?) Idioandrosporous; vegetative cell 21-29382-110u; oogonium
39-54 X42-65u; oospore 37—5240-574; dwarf male 14-16X40-57n;
antheridium 9-14 10—16ux.
Uruguay.
142b. Var. idioandrosporum Nordstedt and Wittrock.
(Pl. XLIX, figs. 475 and 476.)
In Wittr. & Nordst. Exs. 1879; Oe. huntit Wood in Tilden Amer. Algae 1894;
Oe. crassiusculum Wittr. in P. B. A. 1895; Oe. crasstpellitum West 1899, p. 55, P1. 394,
figs. 3-5; Hirn 1900, p. 215, Pi. XX XV, fig. 220; Collins 1909, p. 255; Heering 1914,
p. 178, fig. 242; Tiffany 1926, p. 103, Pi. VIII, fig. 89; P. B. A. Nos. 72 and 716.
Idioandrosporous; oogonium 1-8, globose-obovoid to globose, pore
superior; oospore ellipsoid-globose, ovoid, angular-globose (rarely
globose), nearly filling the oogonium, spore wall smooth, thick; andro-
sporangium 1—4; dwarf male straight or slightly curved, on or near the
suffultory cell; antheridium exterior, 1-2; vegetative cell 25-36 X 65—200y;
oogonium 48-59X57—-90u; oospore 42-57 50-664; androsporangium
30-34 X 12-214; dwarf male stipe 14-16X60-70u; antheridium
8-10 X 10-18.
United States: Massachusetts, Maine, Michigan, Penn-
sylvania, New Jersey, Minnesota, Connecticut, South Dakota,
Iowa, Ohio, New York, Illinois, Mississippi; England, Denmark,
France, Germany, Sweden.
This variety is one of the commonest of the nannandrous
species of the genus. In fact, in comparison to it, the type
seems rare. Characterized by the thick-walled oospore, globose-
obovoid oogonia, and relatively long and straight vegetative
cells. It differs from the species largely in its idioandrosporous
habit.
142c. Var. cataractum (Wolle) Tiffany nov. comb.
(Pl. XLIX, fig. 477.)
Oe. cataractum Wolle 1887, p. 77, Pl. 85, figs. 10-12; zbid., Hirn 1900, p. 308,
Pil. XLII, fig. 264; zhid., Collins 1909, p. 266.
Oogonium 1-2, often terminal, obovoid-globose or subglobose or
broadly ovate, pore superior; oospore globose or obovoid-globose,
nearly filling oogonium; androsporangium 2-6; dwarf male curved, on
suffultory cell or below; vegetative cell 28-38 X42-112u; oogonium
55-60 X60-75u; oospore 50-5550-60u; androsporangium 26-30X
10-15; dwarf male 10 65uy.
United States: Pennsylvania, Ohio.
From Wolle’s description this plant is certainly very close
to Oe. crassiusculum, as suggested by Hirn (1900). Wolle’s
‘
OEDOGONIUM 131
figure does not help much and his confusing statements regard-
ing an interior and a unicellular antheridium probably mean
that he did not attach much significance to this character.
The Ohio material with short vegetative cells seemed close to
Oe. crassiusculum in other characteristics. I have therefore
placed Wolle’s species as a variety of crassiusculum, with an
emended description based on the Ohio specimens.
143. Oe. multisporum Wood.
(Pl. XLVI, figs. 450 and 451.)
1869, p. 141; Androgynia multispora Wood 1872, p. 196, Pl. 17, fig. 3; Hirn 1900,
p. 232, Pl. XXXIX, fig. 239; Collins 1909, p. 257; Fritsch and Rich 1913, p. 76,
Age oA PB. A. No, 1784.
Dioecious, nannandrous; oogonium 1-3, subovoid or subglobose,
pore superior; oospore globose, nearly filling oogonium, spore wall
smooth; dwarf male a little curved or nearly erect, near or on oogonium,
antheridium exterior, 1-4; vegetative cell 10-15 10-30u; oogonium
24-35 X 27-334; oospore 27-380 24-30u; dwarf male stipe 10-11
26-30u; antheridium 7-9 X 7-9u.
United States: Pennsylvania, Illinois; England.
148a. Var. magnum Ackley.
(Pl. XLVI, fig. 452.)
1929, p. 305, Pl. XXXVI, figs. 20-22.
Larger than the species; idioandrosporous; oogonium 1, subglobose,
pore supramedian (rarely median); androsporangium 1-2; dwarf male
on or near oogonium or scattered; vegetative cell 14-18 30—-90n;
suffultory cell 17-21X28-90u; oogonium 40-43X33-38u; oospore
38-41 32-36; androsporangium 17-18 X16—22u; dwarf male stipe
12-14 (—20) X 24-26 (—29)u; antheridium 8-10 (—12) X8-10u.
United States: Michigan (Muskegon Lake).
It is sometimes difficult to decipher the pore in the species
proper. The plant is usually irregularly formed with numerous
and often scattered dwarf males and frequently gives the
appearance of not being mature. The variety is larger.
144. Oc. irregulare Wittrock.
(Pl. XLVI, fig. 447.)
1870, p. 128; 1874, p. 22; Hirn 1900, p. 202, Pl. XX XIII, fig. 207.
Dioecious, nannandrous; oogonium 1, globose or rarely subdepressed-
globose, pore superior; oospore globose, completing oogonium, spore
wall smooth; dwarf male erect, on or near oogonium, antheridium
exterior, 1-4; vegetative cell 15-20 40-80u; oogonium 37-45 X 3647p;
oospore 36-42 3441y; dwarf male stipe 12-15 X 20-24y; antheridium
10-12 X6-8uy.
United States: Illinois, Ohio, Florida, Michigan; British
Columbia; Denmark, Sweden.
132 THE OFDOGCONTACEAE
144a. Var. condensatum (Hallas) Hirn.
(Pl. XLVI, figs. 448 and 449.)
1906, p. 17, Pl. III, fig. 15; Oe. condensatum Hallas 1905, p. 400, fig. 4.
Idioandrosporous; oogonium rarely in two’s; oospore depressed-
globose; androsporangium 1-13; vegetative cell 14-18X20-80,;
oogonium 35-46 28-38; oospore 32-44 25-36u; androsporangium
12-14X7-21yu; dwarf male stipe 11-13X21-24y; antheridium 9-10
7-12u.
United States: Michigan; Denmark.
The species is characterized by erect dwarf males, globose
oospores, and smooth spore walls. It is larger than Oe. multi-
sporum (No. 143) and there is little tendency toward a cluster
of dwarf males. The var. condensatum has depressed-globose
oospores and the dwarf males sometimes appear more or less
in clusters. In superficial appearance there is considerable
resemblance between Oe. multisporum var. magnum (No. 148a)
and Oe. irregulare var. condensatum.
145. Oe. donneilii Wolle; Hirn.
(Pl. XLV, fig. 437.)
Wolle 1880, p. 48; Wolle 1887, p. 85, Pl. 84, figs. 3-6; Hirn 1900, p. 206, Pl.
NOOO He aul
Dioecious, nannandrous, idioandrosporous; oogonium 1 (rarely 2),
obovoid-globose, pore superior; oospore globose, not filling oogonium,
outer layer of spore wall echinate, spirals 5-7, anastomosate; andro-
sporangium 4-10; dwarf male a little curved, on suffultory cell or rarely
on oogonium, antheridium exterior, 1-2—?; vegetative cell 41-59x
54-175; oogonium 63-78 X 70-93; oospore (with spines) 60-70 X 60-70y;
androsporangium 40-45 10-124; dwarf male stipe 16-21X63-74u;
antheridium 14-15 x 8-22u.
United States: Florida.
145a. Var. wittrockianum Hirn.
(Pl. XLV, figs. 438 and 439.)
1909, p. 207, Pl. XXXIV, fig. 212; Oe. wittrockianum Hirn 1896 in Wittr.,
Nordst, and Lagerh. Alg. Exs. No. 1251.
Smaller; spines a little smaller; vegetative cell (82—)35-45 X 70-135;
oogonium 63-73 68-754; oospore (with spines) 55-6656-68y;
androsporangium 30-38X 11-264; dwarf male stipe 11-15 50-65;
antheridium 9-10 20-23.
Brazil, Paraguay.
The species is characterized by the echinate oospore wall,
the spines being arranged spirally. The variety wittrockianum
is very similar to the type, having slightly more slender fila-
ments and smaller spines.
OEDOGONIUM 133
146. Oe. armigerum Hirn.
(Pl. XLII, fig. 415.)
1900, p. 203, Pl. XX XIII, fig. 208; (?) Oe. echinatum Wood tn Wolle 1887, p. 86,
Pl. 85, figs. 13-16.
Dioecious, nannandrous; oogonium 1, subglobose, pore superior;
oospore globose, nearly filling oogonium, outer layer of spore wall
echinate; dwarf male curved, on suffultory cell, stipe sometimes 2—4
celled; antheridium exterior, 1—?; vegetative cell 9-11 36—100n;
oogonium 29-33 X32-35u; oospore 26-29 x 26-29; dwarf male, lower
cell 7-8 X 20-24, upper cell 4-6 X 21-30y; antheridium 5-6 X7-8un.
Brazil.
Characterized by its echinate oospore wall with the spines
not spirally arranged. It is smaller than either Oe. echinatum
(No. 147) or Oe. lindmanianum (No. 148).
147. Oe. echinatum (Wood) Wittrock.
(Pi. XLV, fig. 436.)
Androgynia echinata Wood 1872, p. 198, Pl. 18, fig. 3; Oe. echinatum Wittr. 1878,
p. 137; Hirn 1900, p. 204. |
Dioecious, nannandrous; oogonium (?) 1, globose, usually depressed,
pore superior; oospore globose, distending oogonium, outer layer of
spore wall echinate; dwarf male suberect, near oogonium, (?) antheridium
exterior, 1; vegetative cell 8-13X50-138y; oogonium 35-36 35-36;
oospore (without echinations) 25-26 x 25-26u.
United States: Pennsylvania.
Wood’s figure of the echinate oospore is the only record
of this species, other than the description above.
148. Oe. lindmanianum Wittrock.
(PL. XLV, figs. 434 and 435.)
In Wittr., Nordst., and Lagerh. Alg. Exs. No. 1216, 1896; Hirn 1900, p. 204,
Pl. XXXIV, fig. 209.
Dioecious, nannandrous, idioandrosporous; oogonium 1, obovoid-
globose or subglobose, pore superior; oospore globose or subglobose,
quite filling oogonium; outer spore wall echinate; androsporangium to
7-seriate; dwarf male a little curved, on suffultory cell, antheridium
exterior, 1; vegetative cell 22-30 40-120u; oogonium 46-57 x 46-57;
oospore (with spines) 45-56 X 45-54; androsporangium 22-28 & 17-27;
dwarf male stipe 12-15 838—46u; antheridium 6-8 x 11-16n.
Paraguay.
Cf. Oe. armigerum (No. 146).
149. Oe. cyathigerum Wittrock.
(Pl. LI, figs. 484 and 485.)
1870, p. 131, Pl. 1, figs. 6 and 7; Oe. cyathigerum Wittr. var. rumelica Istvanffi
1890, p. 77; Oe. ornatum Hirn 1896, p. 3, fig. (p. 4); Hirn 1900, p. 252, Pl. XLIII,
figs. 265 and 266; Heering 1914, p. 184, fig. 256; Tiffany 1926, p. 103, Pl. IX, figs.
104 and 105.
Dioecious, nannandrous, idioandrosporous; oogonium 1-3, subovoid
or quadrangular-ellipsoid, pore superior; oospore same form as oogonium,
134 THE OE DOEGONLACG EAE
filling it, outer layer of spore wall smooth, median layer with 16-25
longitudinal, continuous, rarely anastomosing, often curved, ridges—
inner layer smooth; basal cell elongate; terminal cell, often an oogonium,
obtuse; dwarf male goblet-shaped, curved, on the suffultory cell or
oogonium; antheridium interior; vegetative cell 21-30*40-300y;
suffultory cell 42-4875-110u; oogonium 57-66 70-100”; oospore
51-62 60-754; androsporangium 23-80X12-30u4; dwarf male cell
12-15 X 50-58n.
United States: Iowa, Illinois, Ohio, Mississippi, Michigan;
Denmark, France, Germany, Sweden, Rumania, Switzerland,
England.
149a. Form americanum Wolle.
1887, p. 77, Pl. 81, figs. 20-22: Hirn 1900, p. 256.
Smaller; dwarf male on oogonium; vegetative cell 17—21 X 22-62y;
oogonium 45-50 55-63; oospore 39-40 X 4446y; dwarf male 12-15
50-54 yu.
United States: Pennsylvania.
149b. Form ornatum (Wittrock) Hirn.
(Pl. LI, figs. 488-490.)
1900, p. 254, Pl. XLIII, fig. 267; Oc. cyathigerum Wittr. var. ornatum Wittr.
1878, p. 134.
Idioandrosporous; elongated dwarf males; vegetative cell 21-30
60—270u; suffultory cell 39-48 x60-116u; oogonium 56-65 x 69-102u;
oospore 54-60 65-83u; androsporangium 21—27 X 138-27y; dwarf male
12-16 X60-75p.
Mexico (Vera Cruz).
149c. Form perfectum Hirn.
(Pl. LI, figs. 486 and 487.)
1900, p. 254; Pl. XLIII, fig. 268; Oe. cyathigerum Wittr. in Borge 1896, p. 5.
Larger; androsporangium to 238-seriate; vegetative cell 22-35
65-350u; suffultory cell 37-56 56-140u; oogonium 65-81 72-111;
oospore 61-78 X65-85y; androsporangium 21-30 15-30u; dwarf male
12-16 X 55-69.
United States: Mississippi, Ohio; Brazil; Australia; India.
149d. Var. ellipticum Magnus and Wille.
(Pl. LII, fig. 493.)
In Wille 1884, p. 40, Pl. 2, fig. 67; Hirn 1900. p. 255, Pl. XLIV, fig. 271; Fritsch
and Rich 1924, p. 320, fig. 4 A-C.
Oospore frequently not filling oogonium, quadrangular-ellipsoid
or nearly ellipsoid or rarely subglobose; vegetative cell 19-80 30—-120y;
suffultory cell 26-4340-125u; oogonium 50-63X68—94y; oospore
48-57 X 45-664; dwarf male 15-18 X43-55y.
United States: Ohio; Uruguay, Brazil; South Africa.
OEDOGONIUM 135
149e. Var. hormosporum (West) Hirn.
(Pl. LII, figs. 491 and 492.)
1900, p. 255, Pl. XLIV, figs. 269 and 270; Oe. hormosporum West 1897, p. 5.
Oogonium and oospore smaller; oogonia 2-10 (rarely 1), andro-
sporangium up to 15-seriate; vegetative cell 22-30 X 76-180y; suffultory
cell 835-45 X 52-112y; oogonium 48-57 X 56-95y; oospore 46-55 & 53-65;
androsporangium 18-22 12-24yu; dwarf male 9-13 47—54u.
Africa.
The species is readily identified among the nannandrous
group by the irregular longitudinal ridges appearing on the
median oospore wall. The suffultory cells are very much
enlarged. The varieties and forms are separated largely on
the basis of size. It differs from Oe. wolleanum (No. 150)
in its smaller number of ribs. Fritsch and Rich (1924) record a
form of Oe. cyathigerum with suffultory cell not always swollen
and with frequently globose oospores. This is perhaps merely
a slight variation of var. ellipticum.
150. Oe. wolleanum Wittrock. te
(Pl. L, figs. 479 and 480.)
1878, p. 137; Wolle 1887, p. 82, Pl. 80, figs. 4 and 5; Oc. aphophysatum A. Br. in
Rabenh. Alg. Sach. No. 291, 1853; Oe. concatenatum (Hass.) Kuetz. f. Juxurians Breb.
in Roumeg. Alg. Exs. Nos. 683 and 1062; Hirn 1900, p. 220, Pl. XX XVII, fig. 226.
Dioecious, nannandrous, gynandrosporous or idioandrosporous;
oogonium 1-4, subobovoid or quadrangular-ellipsoid, pore superior,
wall with raised longitudinal lines on the inner surface; oospore of
same form as oogonium, quite filling it, outer layer of spore wall with
25-35 longitudinal ribs, rarely anastomosate, inner layer smooth;
androsporangium 1-3, often subepigynous or scattered in the upper
part of the filament; basal cell elongate; terminal cell, sometimes
oogonium, short-acute or acuminate; dwarf male on suffultory cell,
stipe slightly curved; antheridium exterior, 1-3; vegetative cell 21-30
65-235u; suffultory cell 45-5668-110u; oogonium 58-68 X69-89y;
oospore 56-66 X65-83u; androsporangium 21-30 18-25u; dwarf male
stipe 15-24 54-60u; antheridium 9-14X7-11p.
United States: Massachusetts, Connecticut, New Jersey,
Iowa, Pennsylvania, Minnesota, Florida, Illinois; Brazil; India;
France, Latvia, Germany; Australia; Greenland.
150a. Var. concinnum Hirn.
(Pl. L, fig. 481.)
1900, p. 222, Pl. XX XVII, fig. 228.
Smaller; oospore not quite filling oogonium; ribs of outer layer of
spore wall finely crenulate; vegetative cell 19-27 80—-180u; suffultory
cell 41-52 X 72-150; oogonium 54-63 X 63-93u; oospore 52-61 X 62-74;
dwarf male stipe 16-20 50—-50u; antheridium 10-13 10-15y.
United States: Minnesota.
136 ive MOE DOGONITACEAE
150b. Form insigne (Nordstedt) Hirn.
(Pl. L, figs. 482 and 483.)
1900, p. 222, Pl. XX XVII, fig. 227; Oe. wolleanum Wittr. var. insigne Nordst.
in Wittr. and Nordst. Alg. Exs. No. 207, 1879.
Stouter; ribs on the oogonium and oospore 35-40; oogonium 1-10;
androsporangium to 10-seriate; antheridium 1-4; vegetative cell 18-36 x
53-250u; suffultory cell 57-66 100—-150u; oogonium 67-80 78-92;
oospore 64-76 X74—90y; androsporangium 19-30 18-304; dwarf male
stipe 18-24 54-68yu; antheridium 12-14 10-12uy.
United States: New Jersey; Sweden.
This species is characterized by regular, longitudinal ribs
on the outer layer of the oospore wall. It differs from Oe.
cyathigerum (No. 149) in this respect and also in having a
larger number of ribs. Var. concinnum has crenulate ribs,
and f. imsigne differs in its slightly larger size and in the
larger number of ribs on the oospore.
151. Oe. concatenatum (Hassall) Wittrock.
(Pl. LU, fig. 494.)
Vesiculifera concatenata Hass. 1845, p. 201, Pl. 51,- fig. 3; Oe. cencatenatum
Wittr. 1874, p. 25; Oe. apophysatum Al. Br. im Pringsh. 1858, p. 71, Pl. 5, fig. 9;
Oe. apophysatum Pringsh. in Wittr. 1872a, p. 22; Oe. concatenatum (Hass.) Wittr.
var. lagenarioides Filarszky 1899, p. 65, Pl. 3; Hirn 1900, p. 228, Pl. XX XVIII,
fig. 230; Heering 1914, p. 180, fig. 245; Tiffany 1926, p. 104, Pl. VIII, fig. 92.
Dioecious, nannandrous, gynandrosporous; oogonium 1-6, subovoid
or quadrangular-ellipsoid, pore superior; oospore of same form as
oogonium, nearly filling it, outer layer of spore wall smooth, middle
layer with pits, more or less distinctly arranged in 30-35 longitudinal
series, inner wall smooth; suffultory cell swollen; androsporangium
1-4; basal cell elongate; terminal cell obtuse; dwarf male curved, on’
suffultory cell; antheridium exterior, 1-4; vegetative cell 25-40 X 75-400, ;
suffultory cell 50-6288-155u; oogonium 63-83 X76-105u; oospore
60-75 X 67-954; androsporangium 25-28 xX 15-364; dwarf male stipe
17-25 X 50-75u; antheridium 13-15 < 12-25u.
United States: Illinois, Iowa, Massachusetts, New Jersey,
Pennsylvania, New York, Michigan; Austria, England, Fin-
land, Germany, Spain, Hungary, Sweden, Denmark; Alaska;
British Columbia.
15la. Form hutchinsiz (Wittrock) Hirn.
(Pl. LII, fig. 495.)
1900, p. 225, Pl. XXXVIII, fig. 231; Oe. hutchinsie Wittr. 1874, p. 42; Heering
1914, p. 180; Tiffany 1926, p. 104.
Form a little smaller, oospore more nearly globose, the pits of the
middle layer of spore wall not arranged in evident longitudinal series;
vegetative cells 26-385X75-210u; suffultory cell 37-50X65-200p;
oogonium 52-75 X67—-95u; oospore 50-73 X 55-77.
United States: Iowa; England, France, Spain.
GEDOCONTUM 137
151b. Var. rectangulare Rich.
(Pl. LIII, figs. 496 and 497.)
1925, p. 72, fig. I.
Oospore quadrangular-ellipsoid, membrane thick, middle layer of
spore wall with its pits in transverse and longitudinal rows (about 15
transverse rows); idioandrosporous; vegetative cell 32-36 X75—400,;
suffultory cell 5088—-155y; oogonium 5676-1054; oospore 48-56 x
67—95u; androsporangium 27 X 15—36uy.
England.
Oe. concatenatum is unique among the poriferous, nan-
nandrous forms of the genus for its prominently pitted oospore.
F. hutchinsie and var. rectangulare are separable largely on the
arrangement of the pits on the median layer of the oospore.
152. Oe. huntii Wood.
(Pl. XLVIII, figs. 465-468. )
1869, p. 333; Wittrock 1878, p. 136; Androgynia huniti Wood 1872, p. 197, Pl. 17,
fig. 2: Hirn 1900, p. 208, Pl. XXXIV, fig. 213; Collins 1908, p. 57; P. B. A. No. 1471.
Dioecious, nannandrous; oogonium usually 1, subglobose or sub-
obovoid-globose (rarely subhexagonal), pore inferior; oospore globose,
not filling oogonium, outer spore wall with four raised spiral ribs; basal
cell elongate; terminal cells tapering, setiferous (consisting of 10 or
more superimposed long cylindrical cells, each smaller in diameter
than the one below); dwarf male nearly straight, on suffultory cell,
antheridium exterior, 1-2 (?); vegetative cell 15-25 xX 36-82u; oogonium
50-60 X52-60u; oospore 38-4238-42u; dwarf male stipe 1152u;
antheridium 10 30u.
United States: Massachusetts, Pennsylvania.
Fruiting material showing the 4 spiral ribs has been seen only
by Wood. Collins (1908) records the species showing the
peculiar tapering setiferous terminal cells (see description
above). This is the only species in the nannandrous group
having ribbed oospores and an inferior pore.
153. Oc. hispidum Nordstedt.
(PI. XLV, fig. 440.)
In Wittr. 1870, p. 128, and 1874, p. 28; Hirn 1900, p. 210, Pi. XX XV, fig. 215.
Dioecious, nannandrous, gynandrosporous; oogonium 1, terminal,
subellipsoid or ellipsoid-globose, pore inferior; oospore globose to
globose-ellipsoid, not filling oogonium or rarely enlarging it, outer
spore wall echinate; androsporangia 2; terminal cell obtuse; dwarf
male a little curved, on suffultory cell, antheridium exterior, 1; vegetative
cell 9-14>“36-130u; oogonium 35-4442-56u; oospore (with spines)
32-39 X32-40u; androsporangium 10-126-8u; dwarf male stipe
7-8 X 17-18u; antheridium 5-6 < 7-9u.
France, Sweden.
138 T EOF D-OGON LACE AE
The only nannandrous species with echinate oospores and
inferior position of the oogonial pore.
154. Oe. cleveanum Wittrock.
(Pl. XLVI, figs. 443 and 444.)
1870, p. 128; 1872a, p. 22; 1874, p. 28; Oe. echinospermum Al. Br. in Pringsh.
1858, p. 70, Pl. 5, fig. 7; Oe. berolinense Wittr. 1872, p. 6; Oe. cleveanum Wittr. var.
arvensis Istvanffi 1887, p. 242; Hirn 1900, p. 209, Pl. XX XV, fig. 214; Oe. cleveanum
Wittr. f. exoticum Hirn 1900, p. 210 (not Hirn 1906, p. 33).
Dioecious, nannandrous, gynandrosporous; oogonium 1, subobovoid-
globose or subglobose, pore inferior; oospore globose, filling oogonium,
outer layer of spore wall dentate, teeth in 4—6 spiral rows, anastomosate;
suffultory cell sometimes tumid; androsporangium 1-7; dwarf male a
little curved, on suffultory cell, antheridium exterior, 1; vegetative cell
(14—) 18-25 40-110u; oogonium 45-60 48-63u; oospore (with teeth)
44-57 X 45-594; androsporangium 18-229-18u; dwarf male stipe
10-11 X 29-32u; antheridium 5-9 X 12-16n.
England, France, Germany, Hungary, Sweden; Brazil.
154a. Form exoticum Hirn.
1906, p. 33, (not 1900, p. 210); Schmidle 1901, p. 344.
Oogonium 1-3; vegetative cell 14-25 44—200u; oogonium 39-46 x
40-47; oospore (with teeth) 38-44 38—-44u; dwarf male stipe 10-11
27-30y; antheridium 6-7 X 11-13.
Caroline Islands.
Oe. cleveanum is characterized by the inferior position of
the oogonial pore and the dentate oospore, the teeth being
arranged somewhat spirally. The form exoticum as described
by Hirn (1900) is so nearly identical with the species as to be
untenable even as a form. The specimens from the Caroline
Islands referred to f. exoticum by Schmidle (1901) and Hirn
(1906) have distinctly smaller oogonia and oospores and are
thus perfectly tenable.
155. Oc. elegans West and West.
(Pl. LIT, figs. 498 and 499.)
19025 pe 12S RIPE tess O=/-kliten! L906. ps loads Via tien 22.
Dioecious, nannandrous; oogonium 1, depressed-globose, operculate,
division median; oospore depressed-globose, quite filling oogonium,
spore wall smooth; dwarf male small, unicellular, on oogonium; vegeta-
tive cell densely and minutely granulate, the deposits spirally arranged;
vegetative cell 6-9 X 25-85yu; oogonium 27-31 X 25-26u; oospore 25-28 X
18-19u; dwarf male 5-6 * 8—9u. °
Ceylon.
The only nannandrous member of the genus with granulate
vegetative cells. Cf. Oe. minus (No. 84).
OEDOGONIUM 139
156. Oe. rigidium Hirn.
(Pl. LIII, figs. 506 and 507.)
1900, p. 237, Pl. XL, fig. 244.
Dioecious, nannandrous, gynandrosporous; oogonium 1, obovoid-
globose, operculate, division superior; oospore globose, nearly filling
oogonium, spore wall smooth, often thick; androsporangium 1-2,
epigynous, subepigynous or hypogynous; vegetative cell broadly
capitellate; terminal cell obtuse; dwarf male curved, on oogonium,
antheridium exterior, 1—?; vegetative cell 12-14388—58yu; oogonium
35-39 (42) X38—45u; oospore (380—-) 34-38 34-38; androsporangium
10-11 X 11—12u; dwarf male stipe 7-9 x 18—22u; antheridium 5-7 X 6-7.
Brazil; South Africa.
The only nannandrous species having the combination of
superior position of the oogonial operculum, and capitellate
vegetative cells.
157. Oe. bengalense Hirn.
(Pl. LITT, figs. 504 and 505.)
1900, p. 268, Pl. XLVI, fig. 287.
Dioecious, nannandrous, idioandrosporous; oogonium 1-4, sub-
depressed-globose to ovoid, operculate, division median, rather wide;
oospore subdepressed-globose or globose; quite filling oogonium, spore
wall smooth; androsporangium 1-4; vegetative cell capitellate; basal
cell elongate; terminal cell, not rarely the oogonium, apically obtuse;
dwarf male obovoid, unicellular, on oogonium; vegetative cell 14-19
45-110u; oogonium 46-5444-54u; oospore 48-48X43-48y; andro-
sporangium 14-15 13-18u; dwarf male 12-13X 16-18n.
India: Bengal.
Cf. Oe. indicum, below.
158. Oe. indicum Hirn.
(PI. LIV, fig. 509.)
1900, p. 269, Pl. XLVI, fig. 288.
Dioecious, nannandrous, gynandrosporous; oogonium 1—2, depressed-
globose or depressed obovoid-globose, operculate, division median,
narrow but distinct; oospore depressed-globose, completing oogonium,
spore wall smooth; androsporangium 1—2—?, subepigynous; vegetative
cell broadly capitellate; basal cell elongate; dwarf male obovoid, un1-
cellular, on oogonium; vegetative cell 20-2550-110u; oogonium
57-64 X48-53u; oospore 55-6143-50u; androsporangium 19-20
8-10u; dwarf male 11-14 18n.
India.
This species together with Oe. bengalense above combine the
characters of capitellate vegetative cells and median position of
a narrow operculum. Oe. indicum is the larger of the two.
Cf. Oe. areschougii (No. 160), Oe. brasiliense (No. 159), and
Oe. confertum (No. 161).
140 THE (OE D'OEOMIAC EWE
159. Oc. brasiliense Borge.
(Pl. LIV, fig. 508.)
1899, p. 4, Pl. 1, fig. 1; Hirn 1900, p. 272, Pl. XLVI, fig. 292.
Dioecious, nannandrous, idioandrosporous; oogonium 1-3, sub-
depressed-globose or subpyriform-globose, operculate, division median,
broad; oospore subdepressed-globose, not quite filling oogonium, spore
wall smooth; androsporangium to 5-seriate; vegetative cell capitellate;
dwarf male obovoid, unicellular, on oogonium; vegetative cell 16-22
35-95u; oogonium 53-63X52-59u; oospore 48-5345-50u; andro-
sporangium 15-16 X 11—14y; dwarf male 10-12 14-19.
Brazil.
Characterized by its broad Ope and capitellate
vegetative cells. :
160. Oe. areschougii Wittrock.
(Pl. LIM, fig. 500.)
1870, p. 122. Pl. 1, figs. 1 and 2; 1874, p. 19, Pl. 1, figs. 10 and 11; Hirn 1900,
p- 270; PEDSGLVLS fig. 289°
Dioecious, nannandrous, gynandrosporous; oogonium 1-6, sub-
depressed- or depressed pyriform-globose, operculate, division median,
broad; oospore globose, rarely subdepressed-globose, not completing,
oogonium longitudinally, spore wall smooth; androsporangium 1-6,
subepigynous or hypogynous or rarely scattered: vegetative cell capi-
tellate; basal cell elongate; terminal cell, usually the oogonium, apically
obtuse; dwarf male obovoid, unicellular, on oogonium; vegetative cell
8-13 X 35-754; oogontum 34-389X36-40u; oospore 22-26X22-25y; |
androsporangium 9-11 10—-12u; antheridium 6-7 X 13-15uy.
United States: New Jersey; Brazil; Finland, Germany,
Sweden, Denmark; Greenland; Siberia.
160a. Var. americanum Tiffany.
(Pl. LII, fig. 501.)
1927, p. 205, Pl. IX, figs. 8 and 9.
Idioandrosporous; oogonium smaller; androsporangium to 11-
seriate; vegetative cell 8-1240-80u; oogonium 29-36 26—-40y;
oospore 23-26 X 22-26u; androsporangium 7-9 X7-11p.
United States: Illinois.
160b. Form robustum Hirn.
(Pl. LITI, figs. 502 and 503.)
1900, p. 271, Pl. XLVI, fig. 290; (?) Oe. obtruncatum var. oblatum Tilden, Amer.
Alge No. 3, 1894; Oe. areschougu {. major Collins 1912, p. 88.
Idioandrosporous; oospore larger; oogonium to 8-seriate; vegetative
cell 12-17 X 36-120u; oogonium 36-40 X 36—-53y,;.0ospore 30-32 X 27-31;
androsporangium 9-12 10-13; dwarf male 6-8 X 14—-15y.
England; (?) Minnesota (U. S.).
OEDOGONIUM 141
This species is characterized by its capitellate vegetative
cells, wide operculum, small size, and small oospores in com-
parison with oogonia. Var. americanum differs from the species
in being idioandrosporous; f. rebustum in addition has larger
oospores.
161. Oe. confertum Hirn.
(Pl. LIV, fig. 510.)
1900, p. 272, Pl. XLVI, fig. 291.
Dioecious, nannandrous, (?) idioandrosporous; oogonium 1-4,
depressed-globose or depressed pyriform, operculate, division median,
wide; oospore globose or subdepressed-globose, not filling oogonium
longitudinally, spore wall smooth; vegetative cell capitellate; dwarf
male obovoid, on oogonium; vegetative cell 19-26 x 66-105u; oogonium
56-63 X 44-56u; oospore 42-48 X 40-44; dwarf male 10-12 13-16n.
Australia.
To be compared with Oe. areschougit (No. 160), which is
smaller and has less depressed oogonia. It is also similar in
appearance to the larger Oe. perspicuum, below.
162. Oe. perspicuum Hirn.
(Pl. LIV, fig. 511.)
1900, p. 273, Pl. XLVI, fig. 293; Oe. diotcum Carter in West and West 1901, p.
175, Pl. IV, fig. 42.
Dioecious, nannandrous; oogonium 1-8, depressed or subdepressed-
globose, operculate, division median, broad; oospore globose or sub-
globose, not filling oogonium longitudinally, spore wall smooth; dwarf
male obovoid, unicellular, on oogonium; vegetative cell (80—) 35-43
95-175u; oogonium 89-100 64-104y; oospore 55-70 52-70u; dwarf
male 15-18 X 19—22n.
Australia; Siam.
Cf. Oe. confertum, above.
163. Oc. clavatum Hallas.
(Pl. LIV, figs. 512 and 513.)
1905, p. 399, fig. 3; Hirn 1906, p. 11, Pl. IV, fig. 28.
Dioecious, nannandrous, gynandrosporous; oogonium 1-3, sub-
pyriform to subdepressed-globose, operculate, division a little above
medium; oospore subdepressed, depressed-globose, or globose, quite
filling oogonium (rarely not), spore wall smooth; androsporangium 1-2,
scattered; dwarf male obovoid, unicellular, on oogonium; vegetative
cell capitellate or nearly clavate; basal cell subhemispherical; vegetative
cell 2-9X5-80u; oogonium 14-26 16-2lu; oospore 12-21X12-14u;
androsporangium 4—6X5-7y; dwarf male 6X 14—-15y.
United States: New York (Long Island); Denmark.
One of the smallest nannandrous species with capitellate
or nearly clavate vegetative cells.
142 a rE -OXE DOG ONT ACE ACE
164. Oe. oelandicum Wittrock; Hirn.
(Pl. LVI, fig. 539.)
Wittrock 1874, p. 17; Hirn 1900, p. 273, Pl. XLVII, fig. 297.
Dioecious, nannandrous, gynandrosporous; oozonium 1-7, depressed-
globose, with 12-16 longitudinal ridges, operculate, division supra-
median, rather broad; oospore depressed-globose, nearly filling oogonium,
spore wall smooth; androsporangium to 6-seriate; vegetative cell
capitellate; terminal cell apically obtuse; dwarf male obovoid, uni-
cellular, on oogonium; vegetative cell 10-15%25-125u; oogonium
31-40 25-324; oospore 25-36 23-30u; androsporangium 7-12
10-184; dwarf male 7-8 X 12-15u.
United States: Michigan; British Columbia; Sweden.
164a. Form minus Borge.
(Pl. LVI, fig. 540.)
LORE pe 20a, ble 2) feel:
Smaller; vegetative cell 9-1036-50u; oogonium 27-30 X 19-25n;
dwarf male 6-7 X 11-12u.
The species is characterized by its longitudinally ridged
oogonia, supramedian operculum, and capitellate vegetative
cells. It is smaller than the similarly appearing, larger Oe.
megaporum, below. F. minus has shorter oogonia.
165. Oe. megaporum Wittrock.
(Pl. LVI, fig. 543.)
1872, p. 3, Pl. 1, figs. 6 and 6; Hirn 1900, p. 274, Pl. XLVII, figs. 298 and 299;
Oe. oelandicum Wittr. var. subpyriforme Wittr. i Wittr., Nordst., and Lagerh.
Alg. Exs. No. 1218, 1896.
Dioecious, nannandrous, idioandrosporous; oogonium 1-6, broadly
pyriform, with 12-16 rounded longitudinal ridges, operculate, division
supramedian and wide; oospore subdepressed-globose, not filling
oogonium, spore wall smooth; androsporangium to 4-seriate; vegetative
cell capitellate, basal cell elongate; terminal cell apically obtuse; dwarf
male unicellular, broadly obovoid, on oogonium; vegetative cell 13-17 X
40-100u; oogonium 37-4240-45u; oospore 31-35 (-38)X27-30y;
androsporangium 10-11 12—22u; dwarf male 8-12X 13-16n. ;
United States: Michigan; Finland, Germany, Sweden.
Cf. Oe. oelandicum (No. 164).
166. Oe. bahusiense Nordstedt.
(Pl. LV, figs. 530 and 531.)
1877, p. 26, Pl. 3, figs. 7-11; Hirn 1900, p. 279, Pl. XLVIII, fig. 307.
Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2),
depressed pyriform, with 9-12 longitudinal ridges appearing as a median
whorl, operculate, division inframedian; oospore depressed-obovoid or
depressed-globose, nearly filling oogonium, spore wall smooth; andro-
sporangium to -+-seriate, scattered, often terminal; vegetative cell
OEDOGONIUM 143
capitellate; dwarf male unicellular, obovoid, small, on oogonium;
vegetative cell 12-15X25-60u; oogonium 30-36 22-291; oospore
23-28 X 20-24u; androsporangium 10--13X5-7y; dwarf male 5-6 8-9u.
Sweden.
This species combines the inframedian position of the
operculum, ridged oogonium, capitellate vegetative cell, and
non-tumid suffultory cell. It differs from Oe. platygynum,
below, in its larger dimensions.
167. Oe. platygynum Wittrock.
(Pt. LVI, fig. 544.)
1872, p. 1; 1874, p. 17, Pl. 1, figs. 5-9; Oe. platygynum Wittr. f: major West 1891,
p. 109, Pl. 18, fig. 1; Hirn 1900, p. 276, Pl. XLVII, figs. 301 and 302; P. B. A.
No. 1677.
Dioecious, nannandrous, gynandrosporous and idioandrosporous;
oogonium 1-2, depressed obovoid, with 7-12 (more often 8) rounded
projections arranged in a whorl around the middle, operculate, division
inframedian; oospore depressed- or subdepressed-globose, not quite
filling oogonium,-spore wail smooth; suffultory cell sometimes tumid;
androsporangium 1-3; vegetative cell evidently capitellate; terminal
cell apically obtuse; dwarf male unicellular, obovoid, small, on
oogonium; vegetative cell 5-11X14-50u; oogonium 21-30 16-24u;
oospore 17-24 13-204; androsporangium 6-8 X7-8yu; dwarf male 4-5
X<8-10u.
United States: New Jersey, Pennsylvania, Florida, Minne-
sota; Brazil; England, Denmark, Finland, Germany, Ireland,
Norway, Latvia, Sweden; Africa; Ceylon.
167a. Form obtusum Hirn.
(Pl. LVI, fig. 545.)
1900. p. 277, Pl. XLVII, fig. 303.
Idioandrosporous, oogonium a little less depressed, processes obtusely
rounded; vegetative cell 6-10X14-50u; oogonium 22-26 18-24y;
oospore 17-19 14-15yu; androsporangium 6-8X8-10u; dwarf male
4—5 X7-9p.
England, Sweden.
167b. Var. continuum Nordstedt.
(Pl. LVI, fig. 546.)
1888, p. 12, Pl. 1, figs. 16 and 17; Hirn 1900, p. 278, Pl. XLVII, fig. 305.
Oogonium to. 5-seriate, projections more truncately rounded;
suffultory cell enlarged; vegetative cell 848u; suffultory cell 12-14x
25-40; oogonium 28-32 X 21-26yu; oospore 22 20y; ? androsporangium
15-17 X 12h.
New Zealand.
144 THE QEDOGONTACEAE
167c. Var. nove zelandiz Hirn.
(Pl. LVI, fig. 547.)
1900, p. 278, Pl. XLVII, fig. 304; Oe. platygynum Wittr. forma Nordst. 1888,
p. 12, Pl. 1, figs. 14 and 15.
Gynandrosporous; oogonium subpyriform, projections obtuse or
truncately rounded; vegetative cells very broadly capitellate, 6-9
20-504; oogonium 24-28 X22-26u; oospore 20-22 18-204; andro-
sporangium 7-8 X7-11p.
New Zealand.
Cf. Oe. bahusiense (No. 166).
168. Oe. longicolle Nordstedt.
(Pl. LV, figs. 516 and 517.)
1878, p: 20; Pl. 2, figs. 11 and 12; Hirn 1900,-p. 263; Pl. XLV, fie278:
Dioecious, nannandrous; oogonium 1-7, pyriform, often elongated
longitudinally, operculate, division median and narrow; oospore sub-
depressed-globose or subglobose, inflating oogonium medianly, not
filling it longitudinally, spore wall smooth; basal cell subhemispherical;
dwarf male unicellular, obovoid, minute, on oogonium; vegetative cell
4-6 X 16-45; oogonium 13-16 16-324; oospore 12-15 X 10—-16y; dwarf
male 24u; basal cell 14 6.
Australia; Ceylon.
168a. Var. senegalense Nordstedt.
(Pl. LV, figs. 518 and 519.)
1880, p. 18, Pl. 1, fig. 23; (2) Oe. delicatulum Kuetz. in Wolle 1887, P1. 81, figs.
12 and 13; Hirn 1900, p. 264, Pl. XLV, figs. 279 and 280. O6¢. longicolle Nordst.
var. senegalense Nordst. f. afghanicum Schaarsch. 1884, p. 249, Pl. 5, fig. 26, and
in Hirn 1900, p. 264, Pl. XLV, fig. 281.
Larger; vegetative cell 5-8X1240u; oogonium 16-20X 14-24;
oospore 14-20 11-17; basal cell 13-14 X 5-7.
Africa; Brazil; Ceylon; Australia; Afghanistan; Burma.
The species is characterized by its small size, subhemi-
spherical basal cell, nannandrous habit, and smooth oogonium.
It is the smallest of similar species that follow: Oe. rothii
(No. 169) and Oe. decipiens (No. 171).
169. Oc. rothii (Le Clerc) Pringsheim.
(Pl. LV, fig. 526.)
(?) Prolifera rothii Le Clerc 1817, p. 476, Pl. 23, fig. 8; Oe. rothi Pringsh. 1858,
p. 69, Pl. 5, fig. 4; Oe. cryptoporum Wittr. var. vulgare Wittr. f. abbreviata Gutw.
1897, p. 126; Oe. cryploporum Wittr. var. subdepressum Wittr. in Wittr. and Nordst.
Alg. Exs. No. 152, 1878; Hirn 1900, p. 265, Pl. XLV, fig. 282; Collins, 1909, p. 262;
P. B. A. No. 520.
Dioecious, nannandrous, gynandrosporous; oogonium 1-3, sub-
depressed-globose, operculate, division median, narrow; oospore de-
pressed-globose, almost filling oogonium, spore wall.smooth; andro-
sporangium 1-4; subhypogynous, hypogynous, subepigynous, or scat-
tered; vegetative cell 6-10 X 20-76u; oogonium 20-27 X 16—-27u; oospore
17-25 X 14-20u; androsporangium 6-8 X5-10u; dwarf male 4X 11-12uy.
OEDOGONIUM 145
United States: Massachusetts; Austria, Denmark, England,
Germany, Norway, Sweden.
Cf. Oe. longicolle, above.
170. Oe. danicum Hallas.
(Pl. LIV, fig. 515.)
1905, p. 404, fig. 10; Hirn 1906, p. 12, Pl. IV, fig. 24.
Dioecious, nannandrous, gynandrosporous; oogonium 1, pyriform
or pyriform-globose, operculate, division supramedian; oospore globose
or depressed-globose, filling oogonium or not, spore wall smooth;
androsporangium 1-3, hypogynous or scattered; dwarf male obovoid,
unicellular, on suffultory cell or scattered; vegetative cell 4-7 K 20-82u;
oogonium 21-23 X23-35u; oospore 19-20 15-204; androsporangium
4-7 X7-12u; dwarf male 6-7 X 14-16u.
Denmark.
171. Oe. decipiens Wittrock.
(Pl. LV, fig. 520.)
1870, p. 126; Oe. vesicatum Link in De Bary 1856, p. 224, Pl. 5; Oe. rothii (Le
Cl.) Pringsh. f. major West and West 1897, p. 5; Hirn 1900, p. 266, Pl. XLVI, figs.
283 and 284; Collins 1909, p. 262; Heering 1914, p. 188, fig. 258; Tiffany 1926, p. 104,
PI Vinb tie. 88:
Dioecious, nannandrous, gynandrosporous; oogonium 1-3, sub-
depressed globose, operculate, division median, rather narrow; oospore
subdepressed or depressed-globose, almost filling the oogonium, spore
wall smooth; suffultory cell not swollen; androsporangium 1-6, sub-
epigynous, hypogynous, or scattered; dwarf male unicellular, usually
on the oogonium; vegetative cell i 12 28-80u; oogonium 30-38
27—40u; oospore 25- 34K 23- —28u; androsporangium 9— 10x8- 154; dwarf
male 6-7 X 13-15y.
United States: Michigan, Iowa, New Jersey; France, Ger-
many, Sweden, England; Africa.
171a. Form dissimile Hirn.
(Pl. LV, figs. 521 and 522.)
1900, p. 267, Pl. XLVI, fig. 285.
Gynandrosporous; vegetative cells evidently capitellate, 8-11x
25-65; oogonium 28-35 X 23-38u; oospore 23-34 X 21-30u; androspor-
angium 8-9 X6—-10u; dwarf male 5-6 X 11-14uy.
United States: Michigan; Brazil.
171b. Var. africanum Tiffany.
(Pl. LV, figs. 623 and 524.)
1929, p. 74; Oe. decipiens Wittr. forma im West and West 1897, p. 5, and im Hirn
1900, p. 267, Pl. XLVI, fig. 284.
Smaller and idioandrosporous; vegetative cell 8-13 25-60y;
oogonium 25-32 24-32u; oospore 24-30 23-28u; androsporangium
7-11X9-13u; dwarf male 6-7 X9-12u.
Africa.
146 THE OF DO CONTA CEAE
171c. Var. bernardense (Bates) Hirn.
(Pl. LV, fig. 525.)
1900, p. 268, Pl. XLVI, fig. 286; Oe. bernardense Bates 1886, p. 313; Oe. londi-
nense Wittr. var. compressum West 1891, p. 110, Pl. 18, figs. 10-12.
Smaller; gynandrosporous; androsporangium to 8-seriate; vegetative
cell 8-12 18—-45u; oogonium 25-31 21-32u; oospore 21-29 x 17—24y;
androsporangium 7-11 5-11; dwarf male 6-7 X 10-12u.
England, Spain.
The tendency of the decipiens group toward capitellate
cells reaches a maximum in f. dissimile. The others are either
not noticeably or only somewhat capitellate. The small size,
nannandrous habit, and median operculum are also character-
istic. F. africanum is idioandrosporous, while f. bernardense 1s
gynandrosporous.
172. Oe. macrospermum West and West.
(Pl. LV, figs. 527 and 528.)
1897, p. 472, Pl. 7, figs. 6 and 7; Hirn 1900, p. 227, Pi. XX XVIII, fig. 232; Oe.
macrospermum West and West f. patagonicum Borge and Hirn in Borge 1901, p. 9,
Pl. 1, fig. 1, and im Hirn 1906, p. 18, Pl. III, fig. 18; Tiffany 1926, p. 105, PI. Vir,
figs. 93 and 94.
Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2),
subdepressed to depressed-globose, operculate, division median, narrow;
oospore subdepressed-globose, filling the oogonium, spore wall smooth;
dwarf male slightly curved or straight, not infrequently at right angles
to the filament, on suffultory cell or on oogonium or scattered; anther-
idium exterior, 1-4; basal cell elongate; androsporangium 1—?; vege-
tative cell 10-16 30-80y; oogonium 39-46 3444u; oospore 36-44
32-42u; dwarf male stipe 9-1416-30u; androsporangium 14-15 xX
10-11; antheridium 7-10 6—-16y.
United States: Iowa, Michigan, Ohio; England, Latvia;
Patagonia.
The above description as emended by Tiffany (1926) from
material collected in Iowa includes f. patagonicum Borge and
Hirn (Borge 1901). The species is characterized by its par-
ticularly straight vegetative cells, narrow median operculum,
and dwarf males scattered and often at right angles to the
filament.
173. Oe. costatum Transeau nov. sp.
(PI. LVI, fig. 548.)
Dioecious, nannandrous, gynandrosporous; oogonium 1, depressed
globose, with verticillate folds forming distinct pointed projections at
the suture, operculate, division narrow, supramedian; oospore depressed-
globose, filling oogonium, spore wall smooth; androsporangium hypo-
gynous; vegetative cell usually capitellate; terminal cell with rounded
apex; vegetative cells 12-15X50-70u; oogonium 50-55 40-44;
oospore 48-53 X36-42u; androsporangium 12-13X10-12u.
OEDOGONIUM 147
United States: New York (Smithtown Pond and Fish
_Hatchery Pond, Long Island).
Distinguished by its depressed-globose oogonia with verti-
cillate folds forming pointed projections at the suture. It is
larger than Oe. boreale below and is further distinguished by
the shape and form of the oogonium.
174. Oe. boreale Hirn.
(Pl. LVI, fig. 542.)
1900, p. 275, Pl. XLVIT, fig. 300.
Dioecious, nannandrous; oogonium 1 (rarely 2), pyriform, wall
thick and lamellose, medianly plicate, 16-19 verticillate folds, opercu-
late, division supramedian; oospore subglobose (or subpyriform-globose),
inflating oogonium, spore wall smooth; vegetative cell capitellate;
dwarf male broadly obovoid, unicellular, on oogonium; vegetative
cell 18-22 55-150; oogonium 58-65 X 67—78u; oospore 48-53 & 48-53u;
dwarf male 14-16 < 15-20u.
Finland.
Cf. Oe. costatum, above.
175. Oe. mirandrium Skuja. >
(Pl. LIV, fig. 514.)
1927, p. 101, Pl. II, figs. 12 and 12a.
Dioecious, nannandrous, (?) idioandrosporous; oogonium | (rarely 2),
subpyriform globose, operculate, division supramedian, or nearly
superior; oospore globose, quite or not filling oogonium, spore wall
smooth; dwarf male unicellular, ovoid, on oogonium; terminal cell
obtuse; basal cell elongate; vegetative cell 13-20 28—-90u; suffultory
cell 14-24 35-90; oogonium 40-48 x 38-43; oospore 35-42 « 35-42;
dwarf male 9-26 x 11-35u.
Latvia.
Characterized by the supramedian operculum, unicellular
dwarf male, and smaller suffultory cell. It bears some resem-
blance to the macrandrous Oe. pringsheimii (No. 95.)
176. Oe. contortum Hallas.
(Pl. XLVIII, fig. 464. )
1905, p. 399, fig. 2; Hirn 1906, p. 11, Pl. IV, fig. 25.
Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2),
depressed-globose (rarely pyriform), operculate, division inframedian;
oospore depressed (rarely globose), quite filling oogonium, spore wall
smooth; androsporangium 1—5, curved, hypogynous or rarely epigynous
or scattered; dwarf male obovoid, unicellular, on oogonium; vegetative
cell 5-7 X20-60u; oogonium 23-35 xX 16-35u; oospore 16-28 x 12-21y;
androsporangium 5-7 X7—-14y; dwarf male 4X 13u.
Denmark.
148 REE “OE DIO'GON LACE AS
The twisted appearance of the filaments, the inframedian
operculum, and the non-filled oogonia are characteristic. It
should be remarked that Hallas’ original figure which Hirn
copies gives every evidence of an inframedian “‘pore.’’ The
description however indicates an operculate oogonium. The
curved filaments are similar to those of the monoecious Oe.
curvum (No. 2). It should be compared with Oe. platygynum
(Nosi67):
177. Oe. schmidlei Gutwinski.
(Pl. LVII, fig. 572.)
1896, p. 2, Pl. 1, fig. 2; Hirn 1900, p. 228, Pl. XX XVIII, fig. 234.
Dioecious, nannandrous; oogonium 1, obovoid-globose, operculate,
division superior (? narrow); oospore globose, not filling oogonium,
spore wall pitted, rather thick; dwarf male a little curved, on suffultory
cell, antheridium exterior, 1?; vegetative cell 10*25-90u; suffultory
cell 22 44u; oogonium 2932-37; oospore 26 X 26u; dwarf male stipe
5X 27u; antheridium 5-6 X5-6uy.
Austria; British Columbia.
Gutwinski’s figure leaves room for doubt as to the exact
nature of the oospore wall. Hirn (1900) regards it as ‘‘mem-
brana porifera’’ which I have interpreted as pitted. The
record from British Columbia by Mr. G. H. Wailes gave no
added data. In general appearance it resembles the larger and
smooth spored Oe. hians (No. 180).
178. Oe. longatum Kuetzing.
(Pl. LVIILI, fig. 563.) .
1853, p. 11, Pl. 33, fig. 6; Wittr. 1874, p. 38; Nordst. 1877, p. 28; Oe. crispulum
Wittr. and Nordst. im Wittr. 1872, p. 5; Hirn 1900, p. 239, Pl. XL, fig. 248; Heering
1914, p. 182, fig. 249; Tiffany 1926, p. 105, Pl. IX, fig. 106; P. B. A. No. 82.
Dioecious, nannandrous; oogonium 1-8, ovoid to ellipsoid, opercu- —
late, division superior; oospore ellipsoid about filling the oogonium,
spore wall usually smooth, basal cell elongate; terminal cell obtuse;
dwarf male on the oogonium; antheridium exterior, 1—?, curved; vege-
tative cells 4-7 10-35u; oogonium 16-18 X 21—25yu; oospore 15-17
17-19; dwarf male stipe 5-6 X 10-15y; antheridium 4-5 X 5-6u.
United States: Iowa, Massachusetts, Pennsylvania; Austria,
England, Finland, Germany, Sweden; British Columbia.
Cf. Oe. rugulosum, below. —
179. Oe. rugulosum Nordstedt.
(Pl. LVIII, fig. 560.)
1877, p. 28, Pl. 3, figs. 12 and 13; Oe. sp. Borge 1896, p. 5, Pl. 1, fig. 4; Hirn 1900,
p. 241, Pl. XL, figs. 249 and 250; Heering 1914, p. 182, fig. 250; Transeau 1917, p. 231;
Tiffany 1926, p. 105, Pl. IX, fig. 96.
Dioecious, nannandrous; oogonium 1—2, obovoid or obovoid-ellipsoid,
operculate, division superior; oospore ellipsoid, nearly filling oogonium
OEDOGONIUM 149
(or rarely globose-ellipsoid, not filling oogonium) spore wall sometimes
crenulate; dwarf male on or near oogonium; antheridium exterior,
1—?, curved; vegetative cell 4-8X10-35u; oogonium 16-20 X 22-29n;
oospore 15-18X19-23u; antheridium 4-5X5-6u; dwarf male 5-7X
11—-14u.
United States: Iowa, Michigan, New York; Denmark,
France, Sweden; Australia.
179a. Form minutum (Hansgirg) Hirn.
(Pl. LVIII, fig. 561.)
1900, p. 242, Pl. XL, fig. 251; Oe. crispulum Wittr. and Nordst. var. minutum
Hansg. 1886, p. 44.
Smaller; median spore wall distinctly crenulate (Transeau); vege-
tative cell 3-7X12—-40u; oogonium 14-18X18—-24y; oospore 13-17
15-20u.
United States: Illinois; Austria.
179b. Form rotundatum Hirn.
(Pl. LVII, fig. 562.)
1900, p. 242, Pl. XL, fig. 252.
Oogonium a little larger and shorter; oospore globose-ellipsoid;
vegetative cell 5-8 X 15-31y; oogonium 19-23 K 20-26; oospore 18-22
18—23u; dwarf male stipe 5-6 11—l5yu; antheridium 4-6 X4—6uy.
Germany.
This species is near Oe. longatum (No. 178) and is separable
largely on the basis of the form of the oogonium and relative
length of the oospore. Sometimes the oospore wall of Oe.
rugulosum is crenulate. The latter is characteristic of f.
minutum, which is smaller and has more obovoid oogonia.
F. rotundatum has globose-ellipsoid oospores and slightly larger
oogonia. 3
180. Oe. hians Nordstedt and Hirn.
(Pl. LVIII, figs. 570 and 571.)
In Hirn 1900, p. 227, Pl. XX XVIII, fig. 238.
Dioecious, nannandrous, gynandrosporous; oogonium 1-2, subovoid
or globose, operculate, division superior, wide; oospore globose,_ quite
filling oogonium, spore wall smooth, thick, and often lamellose; suffultory
cell tumid; androsporangium 1—2, subepigynous; basal cell elongate;
terminal cell apically obtuse; dwarf male curved, on suffultory cell,
antheridium exterior, unicellular; vegetative cell 9-15 X37—145u; sufful-
tory cell 26-3340-80u; oogonium 37-43 45-60u; oospore 33-40
33-40u; androsporangium 11-12X15-18u; dwarf male stipe 7-9X
32-35u; antheridium 6-8 X 5-6u.
United States: Iowa; Brazil.
Characterized by its swollen suffultory cells, wide operculum,
and tendency toward capitellate vegetative cells.
150 THE OfbDOGONDACE AE
181. Oe. hoersholmiense Hallas.
(Pl. LVII, fig. 559.)
1905, p. 400, fig. 5; Hirn 1906, p. 15, Pl. IV, fig. 21.
Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2),
ellipsoid, operculate, division superior; oospore ellipsoid or globose,
not filling oogonium, spore wall smooth; androsporangium 1-5, often
hypogynous or scattered; basal cell elongate; terminal cell obtuse;
dwarf male curved, on oogonium, antheridium exterior, 1-2; vegetative
cell 7-12 44-160u; oogonium 30-36 X 56-68; oospore 26-32 X 32-45y;
androsporangium 7—-12X16-2lu; dwarf male stipe 9-12*30-35y;
antheridium 7—8 X 10—l1yu; basal cell 3-14 x 16-50p.
Denmark.
This species is perhaps near Oe. ciliatum (No. 185) from
which it differs in its smaller size, longer vegetative cell, and
obtuse terminal cell. The figure of Hallas would seem to
indicate an operculum in a supreme position, although the
description records ‘‘superior.’’ I have included it in both
positions in the key.
182. Oe. laetevirens Wittrock.
(Pl. LVI, fig. 558.)
In Zeller 1876, p. 427; Hirn 1900, p. 239, Pl. XL, fig. 247.
Dioecious, nannandrous; oogonium | (rarely 2), subobovoid-globose,
operculate, division superior; oospore globose or subdepressed-globose,
filling oogonium or enlarging it, spore wall smooth; dwarf male on
oogonium, stipe a little curved, antheridium exterior, 1—?; vegetative
cell 12-13 X 18-32u; oogonium 30-34 X 32-36; oospore 28-32 XK 27-29;
dwarf male stipe 7-8 x 20-21y; antheridium 6X 5-7y.
Brazil.
Cf. Oe. macrandrium (No. 184).
183. Oe. pluviale Nordstedt.
(Pl. XL, figs. 392 and 393.)
In Rabenh. Alg. Eur. No. 2257, 1871; Wittr. 1872, p. 7; Oe. intermedium Kuetz.
in Rabenh. Alg. Sachs. No. 828, 1859; Oe. montagnei Fior.-Mazz. var. submarinum
Wittr. im Wictr. and Nordst. Alg. Exs. No. 905, 1889; Oe. fonticola Al. Br. in Wolle
1887, p. 93, Pl. 75, figs. 4-6; (?) Vesiculifera dissiliens Hass. 1845, p. 202, Pl. 50,
fig. 7; Oe. diplandrium Juranyi 1873, p. 27, Pl. 1-3; (?) Oe. fonticola Al. Br. var.
flavescens Hansg. 1891, p. 305; Oe. montagnei Fior.-Mazz. var. saxicolum Wittr. 1876,
p. 50, Pl. 18, figs. 29-31; Hirn 1900, p. 280, Pl. XLVIII, fig. 311; P. B. A. No. 1190.
Dioecious, nannandrous, idioandrosporous; oogonium 1 (very rarely
2-3), obovoid-globose or subglobose, operculate, division superior;
oospore subglobose or subellipsoid-globose, almost filling oogonium,
spore wall smooth; vegetative cell varying much in the same plant;
basal cell elongate; terminal cell obtuse; androsporangium to 10-seriate;
dwarf male broadly obovoid, unicellular, on oogonium; vegetative
cell 22-29 20-55u; androsporangial vegetative cell 18-27X18-27y;
oogonium 34-4534-50u; oospore 32-4031-43yu; androsporangium
17-25 X 6-13; dwarf male 10X 14—15p.
OEDOGONIUM. 15 il
United States: California; Austria, England, France, Spain,
Germany, Hungary, Italy, Ireland, Switzerland, Sweden; Siam.
This species is the Oe. diplandrium Juranyi rather widely
copied in morphological texts. It is characterized by its short
vegetative cells, clustered unicellular dwarf males, and compact
and numerous antheridia. It bears some resemblance to the
imperfectly known Oe. fonticola (No. 208).
184. Oe. macrandrium Wittrock.
(Pl. LVH, fig. 549.)
1870, p. 130, Pl. 1, figs. 3-5; Hirn 1900, p. 233, Pl. XX XIX, fig. 240; Collins
1909, p. 258; Heering 1914, p. 180, fig. 248; Tiffany 1926, p. 106, Pl. IX, fig. 97.
Dioecious, nannandrous; oogonium 1-4, globose-ovoid, operculate,
division superior; oospore globose, rarely ovoid-globose, not completely
filling the oogonium, spore wall smooth; terminal cell obtuse or very
shortly apiculate; dwarf male on or near the oogonium, stipe much
curved, sometimes 2-3 celled; antheridium 1-7; vegetative cells 15-20
45-1004; oogonium 36-42 43-54u; oospore 31-37 X33-39u; dwarf
male stipe 12-13 X 24-33u; antheridium 9-10 7-10y.
United States: Ohio, Iowa, Massachusetts, Pennsylvania;
England, Finland, France, Germany, Denmark, Norway,
Sweden, Switzerland.
184a. Form acuminatum Hirn.
(Pl. LVI, fig. 550.)
1900, p. 234, Pl. XX XIX, fig. 241.
Dwarf male apically broadly acute; vegetative cell 15-19 30-80u;
oogonium 37-45 43-554; oospore 35-40 36-454; dwarf male stipe
11-15 X 24-35u; antheridium 9-13 9-13y.
Sweden.
184b. Form aemulans Hirn.
(Pl. LVH, fig. 551.)
1906, p. 43; Oe. macrandrium Wittr. var. aemulans Hirn 1900, p. 235, Pl. XX XIX,
fig. 242; (2?) Oe. lundense Wittr. in Wolle 1887, p. 79, Pl. 77, figs. 9 and 10.
Vegetative celi 10-15 22-90u; oogonium 28-40 33-45u; oospore
26-36 X 26-364; dwarf male stipe 9-12 20-25u; antheridium 8-9X
8-10u.
United States: Pennsylvania, California, Michigan, Illinois,
Mississippi; Brazil.
184c. Form lundense (Wittrock) Hirn.
(Pl. LVII, fig. 552.)
1906, p. 42, Pl. III, fig. 19; Oe. lundense Wittr. 1872, p. 4, and 1874, p. 23; Oe.
age Wittr. im Hirn 1900, p. 237, Pl. XL, fig. 245; Oe. fonie Hallas 1905, p. 401,
g. 6.
Oogonium subobovoid-globose; oospore wall sometimes thick;
vegetative cell 13-21 X 13-50u; oogonium 31—40 (-45) «34-48u; oospore
52 THE (O12 DOGON TAGE AE
29-36 (40) 29-36 (-40)u; dwarf male stipe 10-15 (21—) 24-32u;
antheridium 8-10 X6-9u.
Finland, France, Denmark, Sweden.
184d. Var. propinquum (Wittrock) Hirn.
(Pl. LVII, fig. 553.)
1906, p. 42, Pl. IV, fig. 20; Oe. propinquum Wittr. 1870, p. 129, and im Hirn
1900, p. 336, IPL SIG, fig. 243; Oe. eremitum Hallas 1905, p. 403, fig. 8.
Smaller; oogonium 1-3; vegetative cell 8-14X18-70u; oogonium
28-36 X 28-45u; oospore 24-31 24-3lu; dwarf male stipe 11-14x
20-35; antheridium 7—9 (—12) *6-8u.
United States: Illinois, Alabama; Austria, France, Sweden,
Denmark, Latvia.
184e. Var. hohenackerii (Wittrock) Tiffany.
(Pl. LVII, figs. 554-556. )
1929, p. 75; Oe. hohenacherw Wittr. 1874, p. 23, and im Hirn 1900, p. 238, Pl. XL,
fiz. 246; Oe. tumidulum in Hohenacker Alg. Exs. No. 404:
Vegetative cell 12-15 2445y; oogonium 29-33 30-35; oospore
27-31 28-31u; androsporangium 11-13 10-14u; dwarf male stipe
9-14 18—24u,; antheridium 5-6 X5-8u.
United States: Michigan, Ohio; India.
184f. Var. scrobiculatum Ackley.
(Pl. LVI, fig. 557.)
1929, p. 305, Pl. XXXVI, figs. 17-19.
Oogonium globose to subglobose; median layer of oospore wall
scrobiculate; vegetative cell 9-11 27-60u; oogonium 32-35 X30-35y;
oospore 31-33X31-32u; dwarf male stipe 1210-184; antheriditum
8X 6-10y.
United States: Michigan (Ox-bow of river near Holland).
The macrandrium group is perhaps one of the most interest-
ing and variable in the genus. The species has rather an
unfortunate name to be nannandrous. The group is readily
recognized by its frequently seriate oogonia, its curved and
twisted dwarf males resting on or near the oogonia and fre-
quently clustered, and its relatively short vegetative cells.
Oe. laetevirens (No. 182) is separable from the group largely on
its smaller size. F. lundense has very short vegetative cells,
and those of var. hohenackerii are slightly longer. Var. scrobi-
culatum is the only member of the group with scrobiculate
oospores. The remaining forms and varieties are separable
largely on the basis of size.
OEDOGONIUM L553
185. Oe. ciliatum (Hassall) Pringsheim.
(Pl. LIX, fig. 583.)
Vesiculifera ciliata Hass. 1845, p. 202, Pl. 52, fig. 2; Oe. ciliatum Pringsh. 1856,
p. 227, Pl. I, figs. 1-10; Pringsh. 1858, p. 70, Pl. 4, figs. 1-14, and Pl. 5, fig. 8; Oe.
piliferum Auerswald in Rabenh. Alg. Sachs. 1855; Hirn 1900, p. 248, Pl. XLI,
fig. 253; Heering 1914, p. 183, fig. 252; Tiffany 1926, p. 106, Pl. IX, figs. 98 and 99.
Dioecious, nannandrous, gynandrosporous; oogonium 1-7, ovoid,
to ovoid-ellipsoid (rarely nearly ellipsoid), operculate, division superior
or nearly supreme; oospore ovoid to subellipsoid, rarely globose, nearly
filling oogonium, spore wall smooth; androsporangium to 8-seriate,
often subepigynous; basal cell elongate; terminal cell setiform; dwarf
male curved, on oogonium; antheridium .exterior, 1; vegetative cell
14-24 35-92u; oogonium 43-5055-72u; oospore 40-47 44-57u;
androsporangium 14-20 10-204; dwarf male stipe 10-15 24-31y;
antheridium 8-10 10-11.
United States: Iowa, Ohio; England, Finland, Germany,
Spain, Sweden, Latvia; British Columbia.
Characterized by its setiform terminal cells and ovoid to
ovoid-ellipsoid oogonia. The division of the oogonium is quite
often practically supreme rather than superior. It is near
Oe. wabashense (No. 192); the latter has capitellate vegetative
cells, supreme operculum, and smaller oogonia.
186. Oc. spectabile Hirn.
(Pl. XLI, figs. 403-405.)
1900, p. 284, Pl. XLIX, fig. 317.
Dioecious, nannandrous, idioandrosporous; oogonium 1, obovoid-
ellipsoid or obovoid, operculate, division superior; oospore ellipsoid,
nearly filling oogonium, spore wall smooth; androsporangtum to 16-
seriate, the androsporangial part of the filament often curved; basal
cell elongate; dwarf male broadly obovoid, unicellular, on oogonium;
vegetative cell 20-32 25-90u; oogonium 42-50*63-72u; oospore
40-48 X 55-62u; androsporangium 19-27 11-19; dwarf male 11-14
16-21.
United States: Mississippi; Australia.
Characterized by the wide variation in cell diameter, the
unicellular dwarf male, and the pronounced curve of the terminal
part of the androsporangial filament. It is similar to Oe.
implexum (below) which is smaller and has relatively more
slender vegetative cells.
187. Oe. implexum Hirn.
(Pl. XLI, figs. 400 and 401.)
1900, p. 283, Pl. XLIX, fig. 316.
Dioecious, nannandrous, gynandrosporous; oogonium 1-3, sub-
obovoid-ellipsoid, operculate, division superior; oospore ellipsoid,
filling oogonium, spore wall smooth; androsporangium to 20-seriate
154 THE OEDO:GONTACEAE
(filament containing androsporangia curved); dwarf male broadly
obovoid, unicellular, on oogonium; vegetative cell 16—-20*33-100y;
oogonium 38-45 X 50-75y: oospore 36-42 47-60z; androsporangium
16-20 X 13-25u; dwarf male 12-14 13-15uy.
Australia.
Cf. Oe. spectabile, above. :
188. Oe. monile Berkeley and Harvey.
(Pl. LVIU, figs. 564 and 565.)
In Hooker 1860, p. 342, Pl. 196, fig. B; Wittr. 1874, p. 40; (?) Oe. birmanicum
Wittr. in Moebius 1892, p. 430, fig. 9B; Hirn 1900, p. 229, Pl. XXXVIII and
XX XIX, fig. 235.
Dioecious, nannandrous; oogonium 1-8, subovoid or subglobose,
operculate, division superior, very broad; oospore globose or subglobose,
quite filling oogonium (except in length), spore wall of three layers:
outer layer smooth, middle layer scrobiculate, inner layer smooth;
vegetative cell sometimes capitellate; basal cell elongate; terminal cell
obtuse; dwarf male a little curved, near oogonium, antheridium exterior,
1—?; vegetative cell 9--1550-160u; suffultory cell 21-29X40-57y;
oogonium 30-39 X30-56u; oospore 28-388 x 28-38u; dwarf male stipe
9X 25u; antheridium 7X 7u.
United States: Massachusetts, Michigan; Australia; Brazil:
188a. Form borgei Hirn.
(Pl. LVIII, fig. 567.)
1900, p. 230, Pl. XX XIX, fig. 237.
Vegetative cell 14-2045-100u; suffultory cell 35-38 45-74u;
oogonium 40-5040-60u; oospore 39-4539-48u; dwarf male stipe
13-14 x 36-40; antheridium 9-11 8-—10p.
Australia.
188b. Var. eminens Hirn.
(Pl. LVITI, figs. 568 and 569.)
1900, p. 231, Pl. XX XIX, fig. 238.
Much larger; gynandrosporous, androsporangium subepigynous;
dwarf male on suffultory cell, antheridium 1-2; vegetative cell 18-25
65-150u; suffultory cell 38-4148-72u; oogonium 56-68% 55-74y;
oospore 53-60 50-584; androsporangium 19-23 X 15-18u; dwarf male
stipe 18-19 40-48; antheridium 10-13 12-14uy.
Australia.
188c. Form victoriense G. S. West.
(Pl. LVIM, fig. 566. )
1909, p. 45, fig. 6 A and B.
Dwarf male a little longer and more narrow, on suffultory cell;
vegetative cell 12-14 60—96y; suffultory cell 27-28 X 68-83y; oogonium
42-45 X42-52u; oospore 40-42 X 40-42u; dwarf male stipe 6-8 X38—-44u.
Victoria, Africa.
OEDOGONIUM 15:
Ol
-
The species is characterized by its scrobiculate oospore, wide
operculum, enlarged suffultory cell, and usually many-seriate
oogonia. Var. eminens is much larger and f. borgei is con-
siderably larger than the type; f. victoriense is near f. borgei,
differing in the size of the oospore.
189. Oe. obtruncatum Wittrock.
(Pl. LIX, fig. 577.)
1874, p. 41; Hirn 1900, p. 284, Pl. XLIX, fig. 318.
- Dioecious, nannandrous, gynandrosporous; oogonium 1-6, ellipsoid,
or globose-ellipsoid, operculate, division supreme, operculum small and
deciduous; oospore of same form as oogonium, nearly filling it, spore
wall smooth; vegetative cell evidently capitellate; basal cell elongate;
terminal cell (often the oogonium) apically obtuse; dwarf male oblong-
pyriform, curved, unicellular, on oogonium; vegetative cell 18-22
56-110u; oogonium 45-55 56-68u; oospore 48-53 52-664; andro-
sporangium 2024u; dwarf male stipe 17—-2036-40u; antheridium
6-8 X 4-6.
United States: Ohio, Illinois; England; Brazil; India; Aus-
tralia.
189a. Var. completum Hirn.
(Pl. LIX, figs. 579-582. )
1900, p. 285, Pl. L, fig. 319.
Oogonium larger; androsporangium 1-5, hypogynous or subepigynous
or epigynous; terminal cell sometimes setiform; vegetative cell 18-22
66-150n; oogonium 55-58 X63-75u; oospore 538-5661-73yu; andro-
sporangium. 20-22 x 19-22.
Bengal.
189b. Var. ellipsoideum Wittrock.
(Pl. LIX, fig. 578.)
1878, p. 141; Hirn 1900, p. 286, Pl. L, fig. 320.
Oogonium longer, ellipsoid, 1-2, terminal; vegetative cell 17-23
54-110u; oogonium 42-54 « 66—-75u.
Venezuela. a
Oe. obtruncatum is characterized by the usually capitellate
vegetative cells, supreme position of the operculum, unicellular
nannandrium, and gynandrosporous habit. The two varieties
completum and ellipsoideum are separable largely on the basis
of differently sized oogonia. The species is much larger than the
gynandrosporous Oe. wabashense (No. 192). It is perhaps
nearest in general appearance to Oe. praticolum (No. 190) and
Oe. supremum (No. 191), both of which are idioandrosporous
and have larger oogonia.
156 DAE OE DOG ONDTACEAE
190. Oe. praticolum Transeau.
(Pl. LX, figs. 586-588.)
1914, p. 298, Pl. XXIX. figs. 1-5; Tiffany 1926, p. 107, Pl. VII, figs. 82-84.
Dioecious, nannandrous, idioandrosporous; oogonium 1-7, ellipsoid
to globose-ellipsoid, often terminal, sometimes scattered; wall some-
times rather thick, operculate, division stipreme, lid small and deciduous;
oospore ellipsoid to globose-ellipsoid, quite filling the oogonium, wall
smooth, androsporangium 1-20; vegetative cell slightly capitellate;
basal cell usually elongate; terminal cell apiculate or extended into a
long hyaline seta; antheriditum exterior, 1; vegetative cell, female
16-26 X65-130u; vegetative cell of androsporangial filament 14-22
56-1104; oogonium 48-6062-74y; oospore 46-58 X60-72y; andro-
sporangium 20-24 x 18—22u; dwarf male stipe 8-14 21—28u; anther-
idium 6-10 7-12u.
United States: Illinois, Ohio, Iowa.
Cf. Oe. obtruncatum (No. 189).
191. Oe. supremum Tiffany.
(Pl. LIX, figs. 573-576.)
1924) p» 185, Pl. I, figs. 3 and 4, Pl. Il, figs. 4 and 5; 1926; p: 107; Pl) VILL,
figs. 90 and 91.
Dioecious, nannandrous, idioandrosporous; oogonium 1-4, globose
or ellipsoid-globose, often terminal, operculate, division at the upper
extremity of oogonium, lid often deciduous; oospore globose or ellipsoid-
globose, filling oogonium, spore wall smooth; androsporangium 1-6;
vegetative cell distinctly capitellate; basal cell elongate; dwarf male
broadly obovoid, unicellular, on oogonium; vegetative cell 24-32
60-132u; oogonium 66-78 X72-90u; oospore 60-66 66—-84u; andro-
sporangium 26—28x30-40u; dwarf male 20-24 24-26u; basal cell
28-32 X 90-110x.
United States: Iowa.
Cf. Oe. obtruncatum (No. 189).
192. Oe. wabashense Tiffany. -
(Pl. LX, figs. 584 and 585.)
1927, p. 208, Pl. IX, figs. 3-5.
Dioecious, nannandrous, gynandrosporous; oogonium 2-3, ellipsoid
or ovoid, often terminal, operculate, division supreme, lid often decid-
uous; oospore ellipsoid or ovoid (rarely globose), filling oogonium or
not, spore wall smooth; androsporangium 1-3, subepigynous; vegetative
cell capitellate; basal cell elongate; dwarf male on oogonium; anther-
idium 1—?; vegetative cell 12-20 36-64; oogonium 36-42 44—60y;
oospore 34-38 X40-55u; androsporangium 12-16 10—20u; dwarf male
stipe 12-1624-40u; antheridium 7—-12X6-10yu; basal cell 18-20
40-644.
United States: Indiana, Ohio.
Cf. Oe. ciliatum (No. 185) and Oe. obtruncatum (No. 189).
OEDOGONIUM Toe
193. Oe. tentoriale Nordstedt and Hirn.
(Pl. LXI, fig. 597.)
In Hirn 1900, p. 248, Pl. XLII, fig. 260.
Dioecious, nannandrous; oogonium 1, terminal, broadly ellipsoid
or obovoid-globose, division supreme, lid small, deciduous, oogonium
wall longitudinally ribbed on the inner surface, ribs often anastomosate;
oospore quite filling oogonium, outer layer of the spore wall with 40-45
longitudinal, very finely crenulate ribs, closely filling in between the
ribs of the oogonium, connected by delicate transverse lines, inner
layer smooth; basal cell elongate; terminal cell obtuse; dwarf male
suberect, on suffultory cell, antheridium exterior 1—?; vegetative cell
20-33 (-37) 60-225; oogonium 66-82X73-88y; dwarf male stipe
10-15 X37-48u; antheridium 9-12 7u.
United States: Illinois; Brazil.
Cf. Oe. acrosporum (No. 195).
194. Oe. michiganense Tiffany.
(Pl. LXI, figs. 594-596.)
1927505 20D el exe iss OSI.
Dioecious, nannandrous, gynandrosporous; oogonium 1-7, globose
to ellipsoid-globose (rarely subglobose), operculate, division at the
upper extremity of the oogonium; oospore globose, filling the oogonium
or not, outer layer of spore wall smooth, middle layer with 12-24
crenulate, sometimes anastomosing, longitudinal ribs, inner layer
smooth; suffultory cell enlarged; vegetative cell broadly capitellate;
basal cell elongate; terminal cell, occasionally oogonium, apically
obtuse; dwarf male, a little curved, on suffultory cell, antheridium
interior; vegetative cell 12-24 80-160y; suffultory cell 32-48 x 64-80u;
oogonium 50-64 50-80u; oospores 44-60 44-60u; androsporangium
16-20 x 16—20u; dwarf male 14-20 X40—56y; basal cell 18-20 70-100u.
United States: Michigan.
The only nannandrous member of the genus possessing a
capitellate vegetative cell, a supreme operculum, and longi-
tudinally ribbed oospores.
195. Oe. acrosporum De Bary.
(Pl. LX, fig. 589.)
1854, p. 47 et seq., Pl. 3, figs. 1-12; Oe. acrosporum De Bary f. connectens Wittr.
in Wittr. and Nordst. Exs. No. 1101, 1893, ix P. B. A. No. 409, 1898, zx Hirn 1900,
p. 245, Pl. XLI, fig. 255; Hirn 1900, p. 244, Pl. XLI, fig. 254; Collins 1909, p. 259;
Heering 1914, p. 183, fig. 253; Tiffany 1926, p. 107, Pl. IX, fig. 103.
Dioecious, nannandrous, gynandrosporous (or idioandrosporous) ;
oogonium 1, terminal, ellipsoid, operculate, division supreme, operculum
small and deciduous; wall of oogonium with longitudinal, sometimes
anastomosing, ridges on the inner surface; oospore quite filling the
oogonium, outer layer of spore wall with 23-30 longitudinal ridges,
closely fitting in between the ridges of the oogonium, inner smooth;
basal cell elongate; terminal cell obtuse; androsporangia 1-2, hypo-
158 LHE: ObD.OGONLACEAS
gynous; dwarf male curved, on the suffultory cell, stipe sometimes
2-3 celled, upper cells long, antheridium exterior, 1-2; vegetative cell
12-21 40-125u; suffultory cell 16-25 26-76u; oogonitum 35-48X
50-63; androsporangium 16-21 12-15u; dwarf male stipe, upper cell
6-8 X 55-71; lower cell 9-12 X 30-38y; antheridium 6-8 X9-15yu
United States: Ohio, Illinois, Iowa, Michigan, New York,
Massachusetts; Austria, England, Finland, France, Germany,
Norway, Sweden; Brazil; Manchuria; ‘Madagascar; British
Columbia.
195a. Form boreale (Wolle) Hirn.
(Pl. LX, fig. 590.)
1900, p. 245, Pl. XLI, fig. 256; Oe. acrosporum De Bary var. boreale Wolle 1887,
p. 84, Pl. 79, figs. 10 and 11.
Filaments few-celled; vegetative celi 14-16 45-80p.
United States: Pennsylvania, New Jersey.
It is very doubtful if this form of the genus is tenable.
The plant described by Wolle seems to have had fewer cells to
the filament than the species proper. From data at hand
regarding other species, it appears this variability in the num-
ber of the cells is largely a matter of environmental conditions.
There are some species in the genus, however, that are never
found except with very few cells to a filament. The form is
retained until more definite data can be secured regarding its
variations. If itis normally few celled, Wolle’s varietal position
must be maintained.
195b. Var. bathmidosporum (Nordstedt) Hirn.
(Pl. LX, fig. 592.)
1900, p. 246, Pl. XLII, fig. 259; Oe. bathmidosporum Nordst. 1878, p. 179; Oe.
acrosporum De Bary in Gutw. “1897, p. 8; Oe. acrospermum De Bary in P. B. A. No.
163, 1896.
Smaller; ribs fewer, 11-17, evidently crenulate; dwarf male stipe
unicellular; vegetative cell 12-17X35-125y; suffultory cell 15-22X
40-110u; oogonium 30-4040-54u; dwarf male stipe 9- DE Ne
antheridium 8-10 X9-12n.
United States: Massachusetts; Austria, Sweden; Brazil.
195c. Var. floridense Wolle.
(Pl. LX, fig. 593.)
1887, p. 83, Pl. 85, figs. 1 and 2; Hirn 1900, p. 246, Pl. XLI, fig. 258.
Smaller with elongate vegetative cell and more tumid suffultory
cell; dwarf male stipe 2-3 celled; vegetative cell 7-8 X 36-85; oogonium
33-39 X 45-50.
United States: Florida.
The only record is that of Wolle.
OEDOGONIUM 159
195d. Var. majusculum Nordstedt.
(PI. LX, fig. 591.)
1878a, p. 21, Pl. 2, figs. 17-18; Hirn 1900, p. 246, Pl. XLI, fig. 257.
Smaller; vegetative cell 14-2150-165y; suffultory cell 18-28x
42-65u; oogonium 44-56 X 54-70u.
Australia.
Oe. acrosporum is readily identified by its single terminal
oogonium and by the dovetailing of the longitudinal ridges of
the inner surface of the oogonium and outer surface of the
oospore. The varieties and form (see note under each) are
separable largely on the basis of number of ribs and size of
cells. The species is easily distinguished from Oe. tentoriale
(No. 193) by its smaller number of longitudinal ribs on the
oospore, by its more slender cells, and differently shaped
oogonia.
SPECIES IMPERFECTLY KNOWN.
The following members of the genus are recorded with
varying degrees of certainty regarding their validity. A few
are unquestionably readily recognized even though a complete
description is not available or possible at the present status
of our knowledge. Some are very near other species, differing
in one or more characters, but lacking sufficient completeness
of description to warrant definite placement in the genus.
Others are included purely as a matter of record. Wherever
possible, the species is included in the key in its probably
proper position, with the idea of calling it to the attention of
the student of the genus and thereby aid in its identification if
collected. Appropriate remarks occur in connection with the
description of each species.
196. Oe. tapeinosporum Wittrock.
(Pl. XXXIV, fig. 314.)
1874, p. 36; 1878, p. 140; De Toni 1889, p. 76; Oe. tapeinosporum var. Angolense
West and West 1897, p. 5; Hirn 1900, p. 297, Pl. XXIII, fig. 117; Heering 1914, p. 224,
fig. 344; Tiffany 1926, p. 96, Pl. VII, fig. 81.
Oogonium 1-2, depressed-globose, operculate, division median,
distinct; oospore depressed-globose, not (rarely nearly) filling oogonium,
spore wall smooth; basal cell subhemispherical; termina! cell obtuse;
vegetative cell (2-) 3-5X1040u; oogonium 15-19 (14-) 17-23;
oospore 13-16 8—14y; basal cell 12-14 5-7y.
United States: Iowa; England, Germany; Columbia; Africa;
India.
160 THE OEDOGONIACEAE
This species is rather readily distinguished by its conspicuous
operculum and small size. No antheridia have been observed
thus far. The Iowa material combined the characters of the
type and the variety Angolense, and the latter thus becomes
untenable. The species is perhaps dioecious, macrandrous.
197. Oe. angustissimum West and West.
(Pl. XXV, fig. 220.)
1897, p. 6; Hirn 1900, p. 314, Pl. L, fig. 321.
(?) Monoecious; oogonium 2, transversely inflated; oospore trans-
versely elliptical and inflating oogonium, wall smooth; filament irregu-
larly flexed and very narrow; vegetative cell 1.8-2X 13--28u; oogonium
9.5X 10.5-14.5y; oospore 9.5 X6.5y.
Africa.
As far as is known, this is the smallest species of Oedo-
gonium. Cf. Oe. inconspicuum (No. 198) and Oe. tapeinosporum
(No. 196).
198. Oe. inconspicuum Hirn.
(Pl. XXXIV, fig. 313.)
1895, p. 23, Pl. 1, fig. 8; 1900, p. 296, Pl. XXIII, fig. 116; (?) Oe. minutissimum
Grun. in Hansgirg 1905, p. 436.
(? Dioecious, macrandrous) Oogonium 1 (rarely 2-3), depressed-
or subpyriform-globose, operculate, division median, narrow; oospore
depressed-globose, filling the inflated part of oogonium, spore wall
smooth; vegetative cell-3—-5 x 20-34; oogonium 138-18 (13-) 17-23;
oospore 12-17 X8-12p.
Columbia; Finland, Austria, Sweden.
In common with most of the smaller sized species of the
genus, Oe. inconspicuum is found attached to other alge or to
submerged macrophytes. Cf. Oe. angustissimum above and
Oe. tapeinosporum (No. 196).
199. Oe. tenuissimum Hansgirg.
1888a, p. 398; 1888, p. 222; Hirn 1900, p. 315.
(2) Monoecious; filament irregularly curved; oogonium 1, subpyri-
form, pore median; oospore globose-ellipsoid, not filling oogonium;
vegetative cell 2.3-6X9-25yu; oogonium 9-18 X 14-23; oospore 15y in
diameter.
Austria.
Characterized by its median pore and elongated oogonium;
cf. Oe. sexangulare (No. 135) and Oe. pusillum (No. 200).
OEDOGONIUM 161
200. Oe. pusillum Kirchner.
(Pl. XXXIV, fig. 316.)
1878, p59; (?) Oe. excisum Wittr. and Lund. in Nordst. 1880, p. 13; Oe. africanum
Lagerh. 1893, p. 155; Oe. Klebahnit Lemm. 1893, p. 509, and 1895, p. 28, figs. 4 and 5;
ibid. in De Wildemann 1896, p. 66, Pl. 5, figs. 2-7; Oe. africanum Lagerh. in Lemm.
1896, p. 502, Pl. 5, figs. 3-20; Hirn 1900, p. 299, Pl. XXIV, fig. 125; Collins 1912, p.
88; Heering 1914, p. 224, fig. 345; Tiffany 1926, p. 95, Pl. VII, fig. 80.
Oogonium 1 (rarely 2), subbiconic-ellipsoid or subbiconic-globose,
seen from above circular, margin even, operculate, division wide;
oospore ellipsoid or globose, generally constricted at the middle, not
quite filling oogonium, spore wall smooth; basal ce!l subhemispherical;
terminal cell obtuse or obtusely conical; vegetative cell 3-6 10—-60y;
oogonium 14-16 X 15-254; oospore 11-13 X 13—-15y; basal cell 7-8 x 7-8yu.
United States: Iowa, Illinois; Austria, France, Germany;
Africa; Brazil; Sumatra.
This species is usually very readily recognized by its
medianly constricted oospore, and whether eventually found to
be monoecious or dioecious, it is a distinct species.
201. Oc. selandiz Hallas.
(Pl. XXXVIII, fig. 359.)
1905, p. 496, fig. 14; Hirn 1906, p. 20, Pi. ITI, fig. 11.
(?) Monoecious; oogonium 1-2, oblong (or angular-oblong), opercu-
late, division superior; oospore oblong-ellipsoid or obovoid, completely
filling oogonium or not; vegetative cell 3-5 X 13-40u; oogonium 9-14 X |
27-30u; oospore 7-12 X 16-25py.
Denmark.
To be compared with Oe. gracillimum (No. 114) and with
Oe. rugulosum (No. 179).
202. Oe. sancti thomee Wittrock and Cleve.
(Pl. XXXVIII, fig. 360.)
In Witt. 1874, p. 40; 1878, p. 141; Hirn 1900, p. 304, Pl. XXIX, fig. 173; Collins
1909, p. 265.
Oogonium 1-3, pyriform, operculate, division superior; oospore
pyriform-obovoid, not quite filling oogonium, spore wall smooth;
basal cell subhemispherical; terminal cell very slender, subhyaline;
vegetative cell 7-15 X 16-88y; oogonium 28-33 XK 36—-50u; oospore 25-30 X
28-35; basal cell 14-23 X8-12uy.
United States: Mississippi, Ohio; West Indies (St. Thomas).
Material from Mississippi and Ohio have been referred to
this species, although antheridia were not observed. It is
perhaps dioecious, macrandrous.
162 TRE ORDIOGCONTUNG EAE
.
203. Oe. fusus Hallas.
(Pl. XXXIV, fig. 311.)
1905, p. 407, fig. 15; Hirn 1906; p. 14, Pl. IV, fig. 26.
(?) Dioecious; oogonium 1, ellipsoid, operculate, division median;
oospore globose, not filling oogonium, spore wall smooth; vegetative
cell 2-3 < 10-23u; oogonium 14-15 31-35y; oospore 12 12y.
Denmark.
Characterized by its small size and ellipsoid oogonium with
globose oospore. Cf. Oe. inconspicuum (No. 198) and Oe.
pusillum (No. 200).
204. Oe. rhodosporum (Welwitsch) Wittrock.
(Pl. XL, figs. 388 and 389.)
1874, p. 34; De Toni 1889, p. 72; Hirn 1900, p. 305, Pl. XXXI, fig. 193.
Dioecious (? macrandrous or nannandrous); oogonium 1-3, obovoid
to globose obovoid, operculate, division superior; oospore same form as
oogonium, nearly or quite filling oogonium, spore wall smooth; antherid-
ium (? androsporangium) =o; vegetative cell 16-23 X 20— -66u; oogonium
35-44 X 45-54; oospore 33-41 X 38-484; antheridium (? androsporang-
ium) 16-19X9-17p.
France, Portugal.
To be compared with Oe. pluviale (No. 183) and with the
two following species.
205. Oe. vesicatum (Lyngbye) Wittrock.
(Pl. XL, figs. 386 and 387.)
Conferva vesicata Lyng. 1819, p. 140, Pl. 47, fig. D1; Oe. vesicatum Wittr. 1874,
p. 39; Hirn 1900, p. 306, Pl. XXXI, fig. 194.
Dioecious, oogonium 1, obovoid or globose-obovoid, operculate, ©
division superior; oospore same form as oogonium which it nearly fills,
spore wall smooth; antheridium (? androsporangium) 1-4; vegetative
cell, female 17-23 X 22-74: male (? androsporangial) 16— -21X28-63y;
oogonium 40-45 x 49-60u; oospore 35-42 X 40-48; antheridium C and-
rosporangium) 16-18 X 11-16p.
Denmark.
Cf. Oe. rhodosporum above and Oe. montagne below.
206. Oe montagnei Fiorini-Mazzanti.
(Pl. XL, figs. 390 and 391.)
1860, p. 259, Pl. 1, figs. 1, 2 and 5; Wittrock 1874, p. 41; Hirn 1900, p. 307, Pl.
XXXI, fig. 195.
Oogonium 1-2, obovoid or globose-obovoid, operculate, division
superior; oospore of same form as oogonium, filling it or nearly so,
spore wall smooth; vegetative cell 18-26 x 20- 1104; oogonium 40-52
48—65u; oospore 38 47 X43— —52u.
Italy.
Cf. Oe. rhodosporum (No. 204) and Oe. vesicatum (No. 205).
OEDOGONIUM 163
= *
207. Oe. flexuosum Hirn.
(Pl. XL, fig. 394. )
1900, p. 318, Pl. XLVIII, fig. 310.
Oogonium 1, obovoid or obovoid- Blonece operculate, division
superior; oospore same form as oogonium and filling it, spore wall
smooth; filament irregularly curved; vegetative cell 15-18 X12-32u;-
oogonium 29-34 X 29-43; oospore 27-32 27-37 pu.
Ireland.
Characterized by its curved filaments and short cells.
Cf. Oe. fonticola (No. 208) and Oe. implexum (No. 187).
208. Oc. fonticola Al. Braun.
(Pl. XLI, fig. 402.)
In Kuetz. 1849, p. 368, and 1858, p. 13, Pl. 40, fig. 2; Oe. rhodosporum (Welw.)
Wittr. 1876, p. 47; Hirn 1900, p. 313, Pi, LUX: fig. 315: Heering 1914, p. 225, fig.
341; Tiffany 1926, p. 106.
Dioecious; oogonium 1-2, obovoid or globose-obovoid, operculate,
division superior; oospore obovoid-ellipsoid or subglobose, nearly or
quite filling oogonium, spore wall smooth; vegetative cell 16-32X
12-70y; oogonium 36-43 (-45) *48-56u; oospore 34-41 (-43) x 40-49u.
United States: Iowa, Indiana, Mississippi; Austria, Italy,
Spain, Germany, England.
Cf. Oe. implexum (No. 187), Oe. flexuosum (No. 207), and
Oe. pluviale (No. 183).
West (1912) records the presence of very small apparently
male filaments of Oe. fonticola, indicating a condition intermed-
iate between ‘‘truly dioecious macrandrous species and those
with large nannandria.’’ If these are really male filaments,
the species becomes dioecious, macrandrous. Until the data
are more complete, Oe. fonticola must remain in the imperfect-
ly known division of the genus.
209. Oe. oryze Wittrock.
(Pl. XXI, fig. 190.)
1876, p. 51, Pl. 13, figs*32 and 33; Hirn 1900, p. 294, Pl. XXII, fig. 118.
Oogonium 1-2, scarcely tumid, subobovoid or subcylindric, pore
superior; oospore of same form as oogonium, nearly filling it or some-
times enlarging it, spore wall smooth; basal cell elongate; terminal
cell acuminate; vegetative cell 24-39X36-120y; suffultory cell 45x
56-90u; single or upper series of oogonium 45-55X65-95u; lower
series of oogonium 43-53 X 45-57; oospore 41-51 (44—) 60-80u.
United States: Mississippi; Italy.
164 Es) Ou D O'G ONDA CE AE
209a. Var. seriosporum (Lagerheim) Hirn.
(Pl. XXI, figs. 191 and 192.)
1900, p. 294, Pl. XXII, fig. 114; Oe. seriosporum Lagerh. 1888, p. 590.
More variable, oogonium sometimes 2-5, lower series of oogonium
_ subcylindric or cylindric-globose; vegetative cell 24-42 (-54) X38-120y;
oogonium, single or wpper series, 48-6060—-99y, lower series 42-54
(35—-) 48-52u; oospore 40-56 & 40-75y.
Germany.
Characterized by the variation in the size of the oogonia
and the vegetative cells on the same plant, the species is some-
what near Oe. mexicanum (No. 44). The variety is even more
variable than the species, and its oogonia are more seriate.
210. Oe. virceburgense Hirn.
(Pl. XXXVI, fig. 336.)
1896, p. 8; 1900, p. 301, Pl. XXIV, fig. 128; 1906, p. 54.
Oogonium 1-8, subpyriform- to subdepressed-globose, operculate,
division a little above median; oospore subdepressed- or depressed-
globose, quite filling oogonium, spore wall smooth; vegetative cell often
broadly capitellate; basal cell half round; vegetative cell 4-6 X 138-45;
oogonium 15-20 15-23y; oospore 14-19 X 14-17u.
Austria, Germany, Hungary.
To be compared with the slightly larger Oe. spurium (below)
and with Oe. petri (No. 90).
211. Oe. spurium Hirn.
(Pl. XXXVI, fig. 333.)
1900, p. 301, Pl. XXIV, fig. 131.
Oogonium single, subdepressed- or depressed-globose, operculate,
division supramedian; oospore of the same form as oogonium, nearly
or completely filling it, spore wall smooth; vegetative cell capitellate;
basal cell elongate; terminal cell apically obtuse or truncate-obtuse;
vegetative cell 9-13 X 20-55y; oogonium 26-29 X 23-28; oospore 24-28 X
21-24.
United States: Ohio; Brazil.
Cf. Oe. virceburgense above. It also has considerable
resemblance to the longer celled filaments of Oe. sphaerandrium
(No. 105).
212. Oe. velatum Hallas.
(Pl. XLI, figs. 398 and 399.)
1905, p. 405, fig. 11; Hirn 1906, p. 23, Pl. IV, fig. 27.
Oogonium single, ellipsoid-globose, operculate, division superior;
oospore globose, not filling oogonium, middle layer of spore wall echinate;
vegetative cell 3-20 25--400u; oogonium 4368; oospore 35X35y.
Denmark.
OEDOGONIUM 165
The cell diameter is extremely variable. The echinate
appearance of the oospore is questioned by Hirn (1906), who
thinks the oospore may be parasitized. _
213. Oc. pilosporum West.
(Pl. XL, fig. 395.)
1891, p. 109, Pl. 18, fig. 3; Hirn 1900, p. 318, Pl. L, fig. 325.
Oogonium single, oblong-ellipsoid, somewhat narrowed at the upper
extremity; oospore subglobose, spore wall thick and outer layer densely
pilose, the hairs short; vegetative cell 11-12 55-70; oogonium 23 x 48y;
oospore (without hairs) 19X21u; oospore wall 2u thick.
Spain.
The above dimensions and description are copied gingerly
by Hirn (1900). From West’s figure one is inclined to agree
with Hirn that the ‘‘oospore’’ may be nothing more than a
fungal parasite within the oogonium.
214. Oe. hoehnei Borge.
(Pl. XXVIII, fig. 251.)
19255 pel2jeelel fies le
(?) Dioecious, macrandrous; oogonium single, ellipsoid, pore super-
ior; oospore globose, not filling oogonium in length, outer spore wall
smooth, middle wall areolate; vegetative cell 43-44 X 148-240u; oogon-
ium 66-72 99-108; oospore 63-65 X 63-65u. E
Paraguay.
This species has spore markings similar to those of Oe.
areolatum (No. 59).
215. Oe. giganteum Kuetzing; Wittrock.
(Pl. XXIX, fig. 260.)
Kuetz. 1845, p. 200; 1853, p. 12, Pl. 37, fig. 2; Wittr. 1874, p. 42; Hirn 1900, p. 295,
Pi Sea, fis: 115:
(?) Dioecious, macrandrous; oogonium 1, cylindric-obovoid, pore
superior; oospore cylindric-ellipsoid or subellipsoid, nearly filling
oogonium, spore wall in three layers: outer smooth, middle layer with
25-30 longitudinal rows of pits, inner layer smooth; vegetative cell
30-50 X 60-225y; suffultory cell 40-6060-210u; oogonium 53-69
67—106u; oospore 51-65 X 65-103.
United States: Ohio; Austria, England, Denmark, Germany,
Sweden.
This species is rather readily identified by its large size and
by the longitudinal rows of distinct pits in the middle layer of
the oospore wall. It is separable from Oe. capense (No. 216)
by its larger size. The arrangement of pits and general appear-
ance are somewhat similar to the nannandrous Oe. concatenatum
166 THE OEDOGONIACEAE
(No. 151). It is doubtless a distinct species, no matter what
its final description may be.
216. Oe. capense Nordstedt and Hirn.
(Pl. XXIX, fig. 257.)
In Hirn 1900, p. 293, Pl. XV, fig. 88.
Oogonium 1-3, obovoid to ellipsoid, pore. superior; oospore of same
form as oogonium and filling it, spore wall in three layers: outer smooth,
middle pitted, with pits in 25-30 longitudinal rows, inner layer smooth;
basal cell elongate; vegetative cell 13-17 X40-100yu; oogonium 35-38 X
53-58; oospore 33-35 X 46-48.
Africa.
This species is perhaps dioecious, macrandrous, although
- antheridia are unreported. Cf. Oe. giganteum above.
217. Oe. moniliforme Wittrock.
(Pl. XII, fig. 114.)
1874, p. 40; Hirn 1900, p. 288, Pl. V, fig. 28.
Oogonium 1-5, pyriform to globose-obovoid or subglose, pore
supramedian; oospore globose or subdepressed-globose, not filling
oogonium, middle layer of spore wall scrobiculate; terminal cell apically
obtuse; vegetative cell 9-11X30-54y; oogonium 23-28 28-35y;
oospore 22-27 X 22-26n.
United States: Michigan, Ohio; Sweden.
- The small size of this species together with its definitely
scrobiculate spore wall makes it readily identifiable, even though
antheridia have not been so far observed.
218. Oe. inerme Hirn.
(Pl. XI, fig. 110.)
1900, p. 287, Pl. II, fig. 10.
(?) Dioecious; macrandrous; oogonium single, subdepressed- or
subpyriform-globose, pore median, rimiform and narrow; oospore
depressed- or subdepressed-globose, not filling oogonium, spore wall
smooth; vegetative cell 12-14X56-96u; oogonium 37-389X3445y;
oospore 33-38 X 28-32u.
England, France, Germany.
218a. Var. mentiens Hirn.
(Pl. XI, fig. 111.)
1900; p: 287, PILL fies 1:
Smaller; oogonium depressed- to pyriform-globose; oospore some-
times nearly globose; vegetative cell 9-1137—-90u; oogonium 28-32
33-45; oospore 27—29 XK 25-28.
France.
The species is to be compared with Oe. sociale (No. 6), Oe.
rufescens (No. 4), and Oe. laeve (No. 1). Var. mentiens is smaller.
OEDOGONIUM 167
219. Oc. sol Hirn.
(Pl. XXXITT, fig. 286.)
1900, p.. 303, Pl. XXVIII, fig. 164.
Oogonium single, globose, operculate, division superior; oospore
globose, completely filling oogonium, spore wall of three layers: outer
smooth, middle with 35-45 granulate ribs sometimes anastomosate,
inner smooth; vegetative cell 13-15X65-110y; oogonium 46-55x
46—55u; oospore 44-53 x 44-53.
Brazil.
If found to be dioecious, macrandrous, it is near Oe. tumt-
dulum (No. 73) and should perhaps be considered a variety of it.
220. Oe. urceolatum Nordstedt and Hirn.
(Pl. XXVII, figs. 238 and 239.)
In Hirn 1900, p. 293, Pl. XIV, fig. 81.
Oogonium 1, obpyriform (rarely oblong-ellipsoid or subellipsoid),
pore superior; oospore globose-ellipsoid or ellipsoid, not filling oogonium
lengthwise, inflating lower part of oogonium, spore wall in three layers:
outer smooth, middle with 15-20 entire, longitudinal ribs, sometimes
anastomosate and often spirally curved, inner layer smooth; basal cell
elongate; vegetative cell 24-30 120-210u; oogonium 58-70 100-125;
oospore 54-60 X 58-70x.
Brazil.
To be compared with the monoecious Oe. paulense (No. 52)
and with the dioecious Oe. boscit (No. 55).
221. Oe. londinense Wittrock.
1874, p. 39; Cooke 1884, p. 170, Pl. 65, fig. 4; Hirn 1900, p. 317.
Oogonium: 1-2, globose, operculate, division median; oospore
globose, quite filling oogonium; (?) antheridium 1-2, hypogynous;
vegetative cell 10-15X15-75u; oogonium 33-35X33-43u; oospore
27-32 X 27-32u; (?) antheridium 12 10-11p.
England; (?) New Jersey.
This species is very uncertain and Cooke’s figure helps none.
It has very much the appearance of Oe. areschougiit (No. 160)
except for Wittrock’s suspicion that it is monoecious. Quite
likely Wittrock was wrong, and the ‘‘antheridia’’ are in reality
androsporangia.
222. Oe. consociatum Collins and Hervey.
(Pl. XL, fig. 396.)
1917, p. 37, Pl. I, figs. 1-4; Collins 1918, p. 65; P. B. A. No. 2068.
Dioecious, ? macrandrous; oogonium single, globose to depressed-
globose, operculate, division median to superior, narrow but distinct;
oospore globose to depressed-globose, filling oogonium, spore wall
smooth; basal cell depressed-globose; vegetative cell, more or less
168 LAE (OED OGONTACEAE
distinctly clavate, 6-12 (-20) X6—50u; oogonium 28-26 X 28y; oospore
26 X 24-26; basal cell 20-24 X 12-16u.
Bermuda.
Characterized by its frequently short and clavate vegetative
cells and depressed-globose basal cells. Its general appearance
is near that of Oe. vesicatum (No. 205), Oe. montagne (No. 206),
and Oe. pluviale (No. 183). Its resemblance to Oe. inversum
(No. 77), noted by Collins and Hervey, seems to the writer
quite far-fetched. The so-called ‘‘stellate clusters’’ of young
plants may be merely the development of numerous zoospores
accidentally lodged in one mass.
223. Oe. lageniforme Hirn.
(Pl. XX, fig. 187.)
1900, p. 291, Pl. XIII, fig. 68.
(?) Dioecious, macrandrous; oogonium 1, obpyriform (in section
sometimes trinodulose), pore superior; oospore globose to ellipsoid,
occupying the lower part of the oogonium, spore wall smooth; vegetative
cell 11-13 45-90u; oogonium 33-36 X48-63u; oospore 29-31 31-38y.
Brazil.
In spite of the incomplete description this species is readily
recognized by its inferiorly inflated oogonium and its relatively
smaller oospore. It bears some resemblance to the monoecious
Oe. pseudoboscit (No. 27).
224. Oc. poecilosporum Nordstedt and Hirn.
(Pl. XXXIV, fig. 305.)
In Hirn 1900, p. 298, Pl. XXIII, fig. 124.
Oogonium 1-2, ellipsoid to depressed-globose (sometimes globose
or subglobose), operculate, division median, broad; oospore of same
form as oogonium, which it nearly fills, spore wall smooth; terminal cell
apically obtuse; vegetative cell 6-8 X 20-47; oogonium 24-28 X 25-38y;
oospore 23-26 X 21—-28y.
Africa.
Compare with Oe. gunnii (No. 101) and Oe. psaegmatosporum
(No. 83).
225. Oe. inflatum Hallas.
(Pt. XXI, figs. 193 and 194.)
1905, p. 408, fig. 16; Hirn 1906, p. 16, Pl. I, fig. 1.
(?) Dioecious; oogonium 1—2, often terminal, subglobose or ellipsoid-
globose, poriferous, pore variable between supramedian and nearly
OEDOGONIUM 169
superior; oospore globose, not filling oogonium, spore wall smooth;
basal cell elongate; vegetative cell of considerable variation in diameter,
the terminal cell often narrow and produced into a long hyaline seta;
vegetative cell 6-27X12-480u; oogonium 37-4954—-76u; oospore
28-35 X 28-35y.
Denmark.
Cf. Oe. tyrolicum (No. 14) and Oe. urbicum (No. 11). The
chief characteristics of Oe. inflatum are the variable position of
the pore, the considerable variation in size of the vegetative
cell, and the long, narrow hyaline sete.
226. Oe. warmingianum Wittrock.
(Pl. XV, fig. 148.)
1878, p. 140; Hirn 1900, p. 290, Pl. XII, fig. 65.
Oogonium single, ellipsoid-ovoid, pore superior; oospore ellipsoid-
globose, not filling oogonium in length, spore wall smooth; (? antheridium
subepigynous) ; vegetative cell 8-9 X32-63y; oogonium 35 X 53y; oospore
30X33u.
Brazil.
It is impossible to determine with any degree of certainty
the position of this species in the genus because of the very
inadequate description.
227. Oe. calvum Wittrock.
(Pl. XXXIV, figs. 309 and 310.)
1874, p. 37; Oe. vesicatum Link in Rabenhorst Alg. Europe 1873; Hirn 1900, p.
316, Pl. L, fig. 323.
Oogonium 1-5, subdepressed-globose, operculate, division median;
vegetative cell 7-9X22-40u; oogonium 27-30 25-30u.
India.
Cf. Oe. poecilosporum (No. 224), Oe. latiusculum (No. 81),
and Oe. pratense (No. 80).
228. Oe. inclusum Hirn.
(Pl. XL, fig. 397.)
1895, p. 21, Pl. 1, fig. 4; 1900, p. 318, Pl. L, fig. 324; Fremy and Meslin 1926,
p. 124, fig. 8
Oogonium 1, suboblong-ellipsoid, wall thickened; oospore ellipsoid
or suboblong-ellipsoid, not completing oogonium or sometimes enlarg-
ing it, spore wall slightly rugulose; basal cell elongate; vegetative
cell 8-12X33-150y; oogonium 24-30 X48-55y; oospore 18-23 X38-48u.
Finland, France.
170 THE “OE D-OGONTACE Ar
229. Oc. plicatulum Wittrock.
(Pl. LVI, fig. 535.)
1874, p. 38; Hirn 1900, p. 310, Pl. XLVII, fig. 296; Oe. rothit Breb. in Rabenh.
Alg. Eur. 2347, 1873.
Oogonium 1-3, subpyriform-globose, medianly plicate, with 12-17
longitudinal ridges, operculate, division supramedian; oospore sub-
depressed- to subpyriform-globose, nearly filling oogonium, spore wall
smooth; terminal cell apically obtuse; vegetative cell 7-11 16-65;
oogonium 23-28 X 24-29; oospore 21-25 21-25n.
India.
To be compared with Oe. oelandicum (No. 164), Oe. mega-
porum (No. 165), and Oe. crenulatum (No. 233).
230. Oc. lagerstedtii Wittrock.
(Pl. LVI, figs. 536-538. )
1874, p. 38; Hirn 1900, p. 311, Pl. XLVII, fig. 306.
Oogonium 1-4, depressed-obovoid, medianly plicate, with 7-11
longitudinal ridges, operculate, division inframedian; oospore depressed-
globose or subglobose, not filling oogonium, spore wall smooth; vege-
tative cell 5-8X10—-48u; oogonium 16-23 13-17y; oospore 13-16X
11—14uy.
Finland, Sweden.
Cf. Oe. platygynum (No. 167).
231. Oe. uleanum Hirn.
(Pl. LV, fig. 529.) |
1900, p. 311, Pl. XLVIII, fig. 308; Oe. sp. Moebius 1895, p. 174, Pl. 2, figs.
11 and 12.
Oogonium 1-2, subpyriform, medianly plicate, with 7-9 longitudinal .
ridges, operculate, division inframedian; oospore globose or subglobose,
not filling oogonium, spore wall smooth; vegetative cell 8-10 40-80y;
oogonium 23-29 X 24-39; oospore 18-22 18—25uy.
Brazil.
Cf. Oe. platygynum (No. 167) and Oe. lagerstedtii above.
232. Oe. pulchrum Nordstedt and Hirn.
(Pl. LVI, fig. 541.)
In Hirn 1900, p. 312, Pl. XLVIII, fig. 309.
(?) Dioecious-nannandrous; oogonium 1, depressed-pyriform, med-
ianly plicate, with 7-10 longitudinal ridges, operculate, division infra-
median; oospore globose or subglobose, not filling oogonium, spore
wall smooth; (?) androsporangium 1-4, subepigynous or subhypogynous
or rarely hypogynous; vegetative cell capitellate; terminal cell (often an
oogonium) apically obtuse, vegetative cell 6-9 X 20-52u; suffultory cell
9-12 15-36y;. oogonitum 23-26 19-264; oospore 18-23 X 16-22);
(?) androsporangium 7-8 X 7-8.
Brazil.
Cf. Oe. bahusiense (No. 166) and Oe. platygynum (No. 167).
OEDOGONIUM Let
233. Oe. crenulatum Wittrock.
(Pl. LVI, figs. 532 and 533.)
1876, p. 49, Pl. 18, figs. 25-27; Hirn 1900, p. 309, Pl. XLVII, fig. 294.
Oogonium 1, broadly pyriform-globose or transversely ellipsoid,
medianly plicate, with about 13 longitudinal ridges, operculate, division
median, narrow but distinct; oospore depressed-globose, inflating
oogonium, spore wall smooth; vegetative cell 6-8 X30—55u; oogonium
25-27 X 26-28; oospore 22-23 X 15-17.
Italy.
233a. Var. gracilius (Nordstedt) Hirn.
(Pl. LVI, fig. 534.)
1900, p. 309, Pl. XLVII, fig. 295; Oe. crenulatum Wittr. f. gracilior Nordst.
1888, p. 12.
Smaller; vegetative cell 4-5x 1340p; oogonium 16-18 X 16-21;
oospore 15-16 X 12-138u.
New Zealand.
Cf. Oe. plicatulum (No. 229), from which it is distinguished
by its median position of the operculum.
234. Oc. saxatile Hansgirg.
1901, p. 1; Hirn 1906, p. 20.
In 1888 Hansgirg described Oe. rufescens var. saxatile as
having an orange-red color and with these dimensions: vege-
tative cell 7—-9(-12) X15—70u; oogonium 18-24 24-36u. MHirn
(1900) considered this as a synonym of Oe. rufescens (No. 4).
In 1901 Hansgirg, apparently feeling the variety to be distinct,
gave it specific rank as Oe. saxatile, adding nothing to its descrip-
tion. It was found in several localities in Austria in a vegetative
state on moist rock. Oe. saxatile may be distinct, but its
description is at present too incomplete to warrant its retention
as a distinct species, except as a matter of record. Vegetative
cells red in color have been noted in a very few species of
Bulbochaete, e. g., B. sanguinea (No. 50).
235. Oe. reticulatum West and West.
1902, p. 129; Hirn 1906, p. 19.
Vegetative cell elongate; oogonium ovoid-globose; oospore globose,
not filling oogonium, spore wall areolate; vegetative cell 7-8 X62-100y;
oogonium 37 X41; oospore 25 X 25u.
Ceylon.
To be compared with Oe. arcyosporum (No. 58) and Oe.
areolatum (No. 59).
1 THE OEFEDOGONIAGCEASB
236. Oe. reinschii Roy.
(Pl. XLI, fig. 406.)
In Cooke 1884, p. 160, Pl. 57, fig. 23; Cymatonema sp. Reinsch 1875, p. xi, P1. 6,
fig. 1 (incorrectly Cymatopleura, p. 77); Oe. sterile Hansg. 1888, p. 43 and 260;
Hirn 1900, p. 319, Pl. L, fig. 326; Lewis and Taylor 1928, p. 193, text figs. 3 and 4.
Vegetative cell subhexagonal or subellipsoid, sometimes nearly
cylindrical; basal cell subhemispherical; apical cell obtuse; vegetative
cell 6-9 (-11) X8—24u; basal cell 8-9 X 5-6y.
United States: Michigan, Florida, New York, Massachu-
setts; Brazil, Paraguay; Austria, England, France, Germany,
Scotland, Sweden.
This species, though as yet never found in fruit, is readily
recognized by its peculiar vegetative cells. Among the typically
hexagonal and ellispoid cells nearly always can be found regu-
larly cylindrical cells. :
ABLE OF SYNONYMS iW
TABLE III.
Alphabetical list of synonyms. The numbers indicate the species of BULBO-
CHAETE in the text considered synonymous, or under which they are discussed.
If the number is preceded by a question mark, the synonym is considered very
doubtful and cannot be definitely authenticated.
BULBOCHAETE No. BULBOCHAETE No.
Gmomalaeringshs..cccecse se: - 246 PNZMGCE NNAGtiNw sian) rapieie reas 34
brebusson Katetz. f...2....54.- ? 9a pygmaea a. major Pringsh..... 38a
GONDWI WiOOGGaAn tannin ese 223 pygmaea b. minor Pringsh..... 34
crenulata Pringsh. v. plena rectangularis Wittr. v. lun-
WWAGineee pane tesner tec tiene at 11 ellie Wittig sect oe: 36
crenulata Pringsh. v. supra- rectangularis Wittr. v. tenuis
TAG UL MBLC in org ia cud otie the 12 Wittr ee er Se 35
GUMOSAaWOOdE ERE tess: 38a rectangularis Wittr. v. nor-
elachistandria Wittr........... pl DE SUE Ga Willie + + crete ec ee 35
elachistandria Wittr........... 214 reliculata NOrdst..t.scss5.6 46a
ellapsospora West............. 227 reticulata Nordst. v. minor
ATE UUOS IPRS OG gee oo Bo Dede Oe 6b I Percale cerelececine Rec eaene tact 38a
TINOTOANVOO GEE A terse ad oe ee 237 MHGUUNHOS POKG Wa tu temeneel se ae 236
CTAGLALTGA CATIA) Gr 35243) 6 ee 20 SAHUGIAL! INGE EN Nan ooo cee co0e0ur 23
intermedia DeBary f. ameri- setigera (Roth) Agardh........ Pill
cana Hirn.. Bae ih ly setigera v. canbyit Wood.......| ?28
intermedia DeBary f. " supra- setigera (Roth) Agardh Vv.
mediana (Wittr.) Hirn....... 12 punctulata Nordst.. aoeel|, ead
intermedia DeBary v. depressa CAAOUONT Watts ap optical Ce Ob & 46
NOME cotati Gis eee eee 12a SMU SUTLPLEX Wilt Gi eee age eke 38a
IALLILO Ta NUE Tas eee ae she eal 4la tenuis (Wittr.) Hirn v. nor-
MINOTANIMB Re eee een) aE vegica (Wittr.) Hirn......... 35
mirabilis Wittr. v. lapponica Lind Witte ene cele ite oe 9
Wiittrs andeltndie) eee: 6 varians Wittr. v. antiqua
mirabilis Wittr. v. tmmersa Nord site, Ucmracnicts c. oda 40a
Waitruty anne meen em aoe. 6a varians Wittr. v. alpina Wittr.
TYG TY NTS 71 MARC al RCo aca an veel: Ubi ae hie 32 A ae At keg 38a
nana Wittr. v. subbasispora es
WVU steeqee ts tee ere ae ee 1 :
pachyderma Reinsch...........| ?46 COSPERYS
pringsheimiana Archer......... 246 SCLICCTOMNOU OP eer eer 23
174 TALE OE DO CONT AG EA
TABLE IV.
Alphabetical list of synonyms for the genus OEDOGONIUM. The numbers
indicate the species or varieties in the text considered synonymous, or under which |
they are discussed. If the number is preceded by a question mark, the synonym
is considered very doubtful and cannot be definitely authenticated.
OEDOGONIUM No. OEDOGONIUM No.
acrosporum f. connectens Wittr.| 195 crispum v. wruguayense f. pro-
acrosporum v. boreale Wolle...| 195a eats awa s aot oa. 109e
ajricanumlagerhnssn.- oe se. 200 crispum f. vernale (Hass.
alicrwuans Karel. ua oS Se 113 Writ tr.) Elan: 28 sare oer 109
amplum Magn. and Wille...... 49a cryptoporumy.vulgaret. abbrev-
angulosum TWallas.............- 135a TUG GL GWe Perna hee ois eee 169
MpiculatinWOller: oases =: Be tay cryptoporum v. subdepressum
apophysatum Al. Br. ........-- 138 Witt Gigs eek eines ie cepa Taree 169
apophysatum Al. Br........... 150 cyathigerum v. ornatum Wittr..| 149b
apophysatum Al. Br.......... 151 cyathigerum v. rumelica Istan..| 149
apophysatum Pringsh...>...... 151 debaryanum Chmiel........... o7a
archerianum Cooke...:........| -? 53b delicatulum Kuetz........ Soh ye LGSe
CREGNANOVEL@aNVAEGE ae . «2 toe 142a diandronites Carter.........s.- 225
areschougit £. major Collins...:| 160b || dtoicum Petroyv.......... oat: 37
bathmidosporum Nordst....... 195b ECMN OUTAGE, oe eee ee a
bemmardense Bates....0.cce5.-| ile Chemin TaMlasn eee ee ae 184d
berolinense Wittt. 2.22... - 154 Cuganeorim Witbi=.- 6.222 epee 95b
DEV MANICINY Wattt. amen. o- 138 CUCU EVE eee eee 4a
birmanicum Wittr..........-.- i 2188 (LOnte Hallastee eee ee eee eee OLS
DORUSTONIUHE WILLE. Jee nea 138 WLAVESGenS WiAttia. ce ene ere 133
calcareum v. gaditanum Lewin..| 132 flavescens v. gynandrosporum
Galosponunn Kirn). jects. 7 eee 57c the to Cae eee 133
candollei (Le Cl.) Breb........ 24 fonticola v. flavescens Hansg...| ?183
RE TAY CTD NGM WA om Ban Joa a Oete 35 gemellipurum Pringsh......... 45a
capillare v. flavescens.......... 35 gemelliparum v. majus Wittr... 48
capilliforme v. australe f. grande v. aequatoriale f. hor-
TVA AS ela Shean gets 5 agg © a6 ack 37d tense: Wraottr sin. cl. see 45b
capilliforme v. australe f. grande. 7ODUSta TAI ere 45d
uberosporum Hirn........... 37c grande v. robustum (Hirn)
GOROONIGUMINV AGEL Je. ame. see 15c flifianiy: 3 5ccck tke ae ere 45d
GUGAVOGIIE WaGtIOR «0... 240+ veond 15 hatniense lalllasy..5.ceee err ae 132a
cataractum Wolle..............| 142c Wesa gon KUetZ. 1a see otek 135
Cigarew CINGteess = 2s 3. eae 95b luspanicum Lewin..........::. 109
COMGTUI TAN SS a:.2.. 2 aes 185 hohenackeru Wittr............. 184e
cleveanum v. arvensis Istv..... 154 hormosporum West............| 149e
cleveanum f. exoticum Hirn.....| 154 huatlense Wests Ace se. eee 118
concatenatum Wittr............ 151 hiiGhinsiae Wattt. sane eee 15la
concatenatum £. luxurtans Breb.| 150 INSLEnis W. minus Harn. - 4... 74a
concatenatum v. lagenartoides intermedium Kuetz............ 183
1 Sit ee ais ie, ts Otel ERA ee 151 inversum Vv. Subclusum Wittr.. . 77
condensaium Hallas. .5:....... 144a inversum t. subclusum (Wittr.)
crassipellitum West........... 142b lelihcatereeis ceare tists hice staonc Oe
ChOSSIUIM NOGiT Ae eee oe 49 Riell manu Waitt as renee ee 54
crenulatum £. gracilior Nordst..| 233a Rlebahnit Lemm............... 200
crispulum Wittr. and Nordst..| ~178 lagerherniy WVilctiee rece mer 109¢c
crispulum v. minutum Hansg.. 179a landsborought Wittr........... 48
crispum v. elongatum Wittr....| 109 landshorought v. gemelliparum
crispum £. gracilis Wittr....... 109e (2ringshe)aWittieseee eee 45a
crispum v. granulosum Nordst.| 109a landsboroughiv.robustumWittr. 48a
TABLE OF SYNONYMS
TABLE IV—(Continued).
OEDOGONIUM
londinense v. compressum West.
longicolle wv. senegalense f.
afghanicum Schaarsch.......
lorentsit Magn. and Wille.....
bundellea With: oe. deck
umlens ev Waites ok sak
PUMMEN SEW atts iatstne eee see 3
macrandrium v. aemulans Hirn.
macrospremum {. patagonicum
Boraerancdullinni. vce lsc.
maxiniim West: oo. acc we nt:
montagnei v. submarinum Wittr
montagnet v. saxicolum Wittr..
monticchit Fior.-Mazz.........
MCRLE CHICA EL ATI rey. eas rte ieee
MOTAStEAvUU WAGED. «av ns se 2
oblongum v. majus Nordst.....
obtruncatum v. oblatum Tilden.
ochroleucum Kuetz............
oelandicum v.
pachydermatosporum Nordst...
pachydermatosporum Nordst...
POIUCOSMI WTEC. ola ole cls -
paludosum (Hass.) Kuetz.....
USGA ALITONN RAE He oo aoe ee ee
piliferum Auersw.............
platygynum £. major West......
polymorphum Wolle...........
DrUnGe PS Wilub in sen eae oho. 1 2
pringsheimiana Archer.........
pringsheimu v. nordstedtii f.
pachydermatosporum
(Nordsi=) Elin: = - 55 ass:
pringsheimiu v. nordstedtii f.
euganeorum (Wittr.) Hirn..
pringsheimu v. varians Nordst.
propinquum Wittr.. or
punctato-striatum v. minor
Witt bir tact gee Ge AerenaN heen
pyrulum v. obesum Wittr......
rhodosporum (Welw.) Wittr...
i RED RAAB eee Be Ge Oe APIO
rivulare v. major Wolle........
rostellatum Pringsh............
rostellatum Pringsh............
ROUNUIASEC DO cee res oeisaheee ooe
PODME TANS Me ere. sae ia
roti {. major West..%..... <4
rufescens f. exiguum (Elv.) Hirn.
rufescens Sue lundellit
(Wittr.) Hirn.. ene
175
OEDOGONIUM
rufescens subsp. lundellii
lig, Ahoy kaon? lathe, eee ooto oe
sertosporum Lagerh...........
SALAG HE SEND son antosacocdes
Spetsbergense Wittr...........
SPphaenrcumdelasen ns. ea 4s:
spinospermum Reinsch........
spirogranulatum Schm........
SUH RGN, Oo sit eiteongis Bore oF
SHORE VW sooo eoenac-
stagnale v. variabilis Lewin....
SVEP PICA AMSO: hotel ae ais cers 3 4
subpisanum Lewin..........::
subcapitellatum Hirn..........
tapeinosporum v. angolense
Wiest and Wiest. <0. sic ..5 ck
WAGKOSPOTWID MUZISS a8 sees. 0
tiandulum Pringsh..).5......
tumidulum (Roth).............
IG EUTUITH NGA 5 5 on a Ae
UNUM TEAL Gee een oe
undulatumv.interrupte-incisum
SehTroedigs ae. .ta< oe Oe ee:
undulatum v. moebuisit Schmid.
undulatum v. senegalense
urbicum v. oviforme Lewin.....
DOUCHE ETON a. . sale eee.
vaucheru Al. Br.; Wittr. f.
paling? lelin ge ances oe oo akoe
UCINGLEaNNialtauier ieee eee aoe
VA BOE NYMIBE, bo ofb on Bae bo db.
UCSUGCILLETTE: le inka neyer eet tere
Desicaiilmn Vink nes yee a:
vesicatum Wittr........ ras fae
vesicatum v. flavescens Kuetz...
vesicatum v. fuscescens Dupray.
Wittrockianun Hanis... 2.2... 28.
wolleanum v. msigne Nordst...
ANDROGYNIA
MUS Dora NNOOG. «e502. eee
CONFERVA
capillare L.. aR OSE
tumidula Eng. Bote ee ass
undulata Breb ree
176 THE OEDOGONIACEAE
TABLE IV—(Continued).
CYMATONEMA No.
confervaceum Kuetz........... 119
PRINGSHEIMIA No.
inaequalis Wood.............. 2-15
PROLIFERA No.
boraszanasise Clos. econo 138
ROSCIMICHE re 22s nee ae 2 oS
TEDL ATES UC Clee. os dence ? 42
FOTO, hoe. 3 ee be L69
vaucherit We GL. so. 2... : beeen: ? 25
VESICULIFERA
capillaris{ilass= fe ee eee
€ardvaca- Hasse eee
ciliata WaASS Ake see ee
COMPIESSGALGSS hacer Bee ee
Concatenaia Hasse eee eee
crispa Diassee ee =. eee
CYUSSOAELASS chee oe eee
flavescens Wass. 2.0 eee aoe
landsborought Hass............
POULAOSORHASS ee a eee
PTUNCEPS LASS. een eae ee
piulchella Wass. eee eee
DENMNGIS, LVASS: 2 eects Sete
BIBLIOGRAPHY Wes
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ND EEX 185
LIND Eee
BULBOCHAETE
Page Page
GAC GOS aL Ext oR ee, ae ta AA a 48 megastoma Wittr. and Lund....... 31
alabamensis Transeau and Brown.. 40 MOEA Bir is oe ate eee 47
angulosa Wittr. and Lund.......... 36 Wie aie Jalihnalns sap ae tho eo 47
iiey ELADS ad ta G0 ne ech eso eae 37 minuta West and West............ 33
QHOMOlLGs Erne Shie sone \ olvt ae cle: 48 OSI OHIS NWVTRGBe visio eo OEb-b 5 vob ho.0 ba 32
f. ammersa (Wittr.) Hirn........ 32
bastspora Wittr. and Lund......... 31 Vv. gracilis (Pringsh.) Hirn...... 32
NO AZHOS NEN Eye Cae eee ae 37 monile Witt. ands Lund. ........-. 30
UV EUTSSONT RUEEZieins ao ssc ee 33 Wo OWMoMslian, waren angawane aso 30
NORM OTANVOLOUs sar astn s aks cae 34 :
AZ IMT NNR es Ue ae aa eee eas c 50 EEL | ABBE 2 3 oo oe Ee a a0
Rls ane andl Tuk 47 NMOTASLCHLLT NWitisuiaens en ata th ve one es 30
; Bal iw carts tes Pa SUOCTEGLONGOWIS == ee eer 37
GOne emer e bint. 20 iter cs oR ce 42 v. minor Woron................. 37
crassa Pringsh.:.................. 41 obliqua: Enders he eas « oe ee 39
Grasswmscula INOTdSt. 0. a20e se 41 pounae! 38
Pee ap ieriny | Ay, wall AY, 4 oljandjoGleyoretcrene ene
|S Saas 2 f noi Hea ee, 38
debaryana Wittr. and Lund........ ail punctulata (Nord.) Hirn........... 41
BeUIGULOLON WAGtEY 3.4 42% hae tenes sae 48 pygmaea Pringsh. Wittr........... 43
diamesandria Nordst. and Hirn.... 38 pyrilumleand!.-.'.:. Gomi os). ote oe 43
OS DOTA TUES «Soke. set Rt Cho ere RR rae 40 :
Rieapariaien Witte... noo 52. 41 GUGET CLO Watiitgaaers = tere eee 42
GOMMOLINIS BOLeen tan ase ke a 43 TectancularisaWwatit eee eee 45
i 2 5 Vv. hvloenstsNordst:. 3.52 a5)... 40
elachistandria Wahlen eye cae 39 repanaa Wikis eS ee ee 44
PURE AAS oe Strela ese oo =.e he * 32 rhadinospora Wittr..............+- 46
ee pumila Hirn. ois ee ee ele seo cue s 33 ¢ iE antiqua (Nord.) Hirn ae i. | A 46
v. scrobiculata Tiffany.......... 33 Vis ILO QIUS Eluiiiiys se nes | eee 47
uUnVCT CRCOMING ee. vee ac oie oe 34 SOMPUIN COM ATIS Cie ern ene ee 50
; ; SESSUUS, Witten tees or yo aes 39
PER MLE ME EISSN 2 2 oA slates 38 feglabra Eline, As oes hoe 39
: ; setigera (Roth) Agard............. 40
WOTICOENG TOS Gaus so: 5k oa 50 spirocranulata West and West. .... 49
imperialis Wittr................-. 49 subintermedia Bliv es... 5... S 36
Pui CORGEES WADE ola ce = rite tas 49 Lense (Watit elie one wee erie 43
RSE QNGs EAMES oe 2. Aes iaje He. 3, 48 v. norvegica (Wittr.) Hirn....... 44
v. recticulata (Nord.) Hirn...... 49 ; - a
intermedia De Bary ot ee CoS 35 valida ee Vgeplehicns! sf.e<.0)») oss) (e! e's 6m (0) (ale lope he ae
rd RCTEET ee ow 235 DONLONSAW luce ee ol eee
ioe v. hawatensis Nordst............ 46
LOCOENSUSPW1GUE-2 > 5 ar)stties stot 46 v. subsimplex (Wittr.) Hirn..... 45
OEDOCLADIUM
albemarlensis Lewis........... Pe OL SF EO1O We WIS, aaa OER Oe SENG 52
sagen WOWiSs. 20%. ache ee 52 PYOLONCILG SS tally anewer pera on eerie 51
*New species, varieties, and forms or new combinations are indicated by an
asterisk.
186 ToE OEFEDOGONTAGE AE
OEDOGONIUM
Page Page
KEMP ION GAS 55005 b00b0b5006 103 concatenatum (Hass.) Wittr....... 136
acrosporium De Banyeerener eos. 157 f. hutchinsie (Wittr.) Hirn......136
i. boreate (Wolle) taimal. 225 so -1. 158 Vin KECLAMEULORENRICH eer ee 137
v. b... nidosporum (Nord.) Hirn.158 GOnfentivn Eine eee ae eeeea eae 141
We MOMUALSE WONG: 5.546 4566 aoe 158 consociatum Collins and Hervey...167
v. majusculum Nordst...........159 Contorii7aLiallases aoe eee 147
APIS AAT HIE MERRIE 45 ol 650 BOO OO Oe 115 costatum Dranseau... 4. se. sees 146
alternans Wittr..and Lund......... 128 GROSS TUS GUILT AistTy sae eee 129
americanum Transeau............. 97 v. arechavalete (Wtr.) Hirn...... 130
angustissimum West and West..... 160 v. idioandros porum Nor. & Wittr.130
Gnomalumebinnieee. fe. so... 6s eo sss 83 *v. cataractum (Wolle) Tiff....... 130
arcyosporum Nord. and Hirn...... 94 GOSS ASS») MVWaltiitae eee 88
GHC OLMIUTUIU ARETE e)58 cle\s eres are - 94 f. amplum (M. and W.) Hirn.... 88
CROSGHOMCLUNVAIL GIR oe isso ele: 140 Va LONG AbrAanSCall-ercemee rete 88
v. americanum Tiffany.......... 141 Vis Sh Hine Webhadly a6 554050556 88
Ig ODMISIWTD Jabhtnlge agg pace aoe 141 crenulatocostatum Wittr........... 92
CRECHLCIMIMGlG erate. «oe « tae s' ore “1 96 lig QM MUPUCRUTE abbot. 553500050060 93
mien eneehnucumese: Midhaniy:. oes). 97 Wo CHiAahie INUGKESON Bosco koa e006 93
QHINVCCIUTAANGIe ees ces oes 133 v. longiarticulatum Hansg....... 93
AUSLCI EWAN sic esne: sects, «Ps ecerei oe bs 120 Grenilanin Witte een ere eneeer 171
GUStTOLOMWye ITM. .....0..+-ses0+s< 99 v. gracilius (Nordst.) Hirn Pet eene 171
MUU IOLE Witt. 1122.2 ss cine a = 112 craspum (Hass.) Wattre> ene. cae 113
bahusiense Nordst............ 20-0. 142 : Ae ea decease
bengalense Hirn............++++++. 139 Vi. Practlescens Witte. .10-2 ett 114
biforme Nordst...........+++++++. 83 Va hawavense Nordsts «tana 114
bohemicum Hirn.............-+++- 105 v. uruguayense Magnus: & Wille. .114
boreale Hirn........ els 9 ei en a 147 CLV PtO POV UMW Iti. tk le ie ee ae 65
borisianum (Le Cl.) Wittr......... 128 Vv. vulgare Wittr....0i0.0. 006+: 66
v. westit Tiffany and Brown..... 128 curtum Wittr. and Lund........... 74
boscit (Le Cl.) Wittr..........---- 91 CUPUUMERTNSSH 2. sao cee a. eee 65
f. dispar Hirn..........-....++. 91 Gyathogerum: Wittt os .ee chee 133
v. notabile Lemm..........----- 92 f. americanum Wolle...... eR te 134
v. occidentale Hirn..........-.-- 92 f. t, aatum (Wittr.) Hirn........ 134.
brastlvense BOrge. i... -j.2- s\n tie 140 f. perfectum Hirn............... 134
braunit Kuetz.; Pringsh........... 125 v. ellipticum Magn. and Wille. . .134
v. hafniense (Hallas) Hirn....... 125 v. hormosporum (West) Hirn....135
Vv. zehnert Tiffany AUCOmMOD ODODE tO 125 cymatosporum Wittr. & Nordstpuan 67
Galcareum Cleviel. o. 0. +0 . see eee 67 ;
Caleta. cs 6 ance ee 169 danicum allash ae eeeee 145
capense Nordst and Hirn.......... 166 decipiens Wittr.................-. 145
captllare (L.) Kuetz.. _.. 80 f. dissimile Hirn.........-...... 145
fe? stagnale (Ketz.; Watt ) Sethaay 80 V. africanum Tiffany. OS cna Or 145
capilliforme Kuetz.; Watitrennc. see 81 v. bernardense (Bates) Hirn..... 146
f. debaryanum (Chmiel.) Hirn.... 81 depressum Pringsh........-+.++--: 124
f. lorentzii (M. and W.) Hirn.... 81 dictyosporum Wittr.........5.-.-. 94
Vv. ausivale Watttie....... +22... 82 f. west Vitlany ........7.--.>. 94
v. diversum (Hirn) Tiffany...... 82 dtoicum Carter. ....-..---.---++>- 107
capitellatum Wittr................ 104 donnellu Wolle; Hirn. See ee ae 132
cardiacum (Hass.) Wittr.......... 70 v. wittrockianum Hirn........... 132
lig COAOJAGLIITE WaUNEas . coda nnoceoe 71
f. pulchellum (Hass.) Hirn...... 71 echinatum (Wood) Wittr.......... 133
Vi COU ONUCUIT WValttine mete yee ere 71 echinospermum Al. Br............. 121
Wo os WASiaahidl vances ooanne 2606 71 Vie ROMRLCILIT ELInie ne eect 122
ciliatum (Hass.)) Pringsh= =. ..--.- 153 elegans West and West............ 138
Clann p NEMENS. 5 5 cGnocnesbod6o- 141 excisum Wittr. and Lund.......... 100
GIEUCONU Wit bee eee eee 138 EXOCOS OUT A AhAMIYs, cst epee cramer 89
ity GAOUICDNTD labbGM, co sogdnaqdoosb56 138 exospirale Tiffany ....:....-).-«:- 122
INDEX LS7
Page Page
PROUMES ILE, EXITING O80 sips ee ve AS tls 83 Rielimaniw Wittresilinne 44> es chre 89
v. columbianum G. S. West...... 84 URSA CULET: Sy. ctw teeny he ae 79
v. maximum (West) Hirn....... 83 is ; :
v. punctatum Lemm............. 84 aes Wittr............-- 200: io
qlapescens i(Hass.) Wittr....)...2... 125 Bee RUE ate ha caer ON auras z
i ares : Lagentonnie selitiile: ere eer ict 168
MIORUMOSUMUEIITINGE 226 1-750 Sidre loss gene 163 fester ied Wate 170
fonticola Al Braune 4. ./5......-. 163 lana res is hi (Ha 5) Witteae.. 87
PGNEOLULMOW ities ee os. ska 95 BLES ORO Et Wit BHM ag i 2 87
MRA CMeMWEtE Mtn cess ea ee 75 ae WES oan c og oo : ie
V. abyssimicum Hitmn...........-- 5 abuUscuilim LIMADY 2-22. ee :
*y. robustum (West) Tiffany 75 lautumniarum Wittr............--- 12
franklinianum Wie 71 leiopleurum Nordst. and Hirn..... 91
fusus Fenias cy 7 eee ree 162 lindmanianum Wittr..............- 133
oid RSE PRN bane Bet Londinense) WAGUE ae. 4:00. soe ee 167
eENESGIE TPE) LATIN scale tye, 0 «oie! coog, oy! oes 124 NOPROONTE ISBNs oesepacrcseooonsn. 148
BUNIGUICIIINT FAITE oe cra. t ae 6 ars10 «e 78 lomencojle Nordste-....sc00,. 45 0. 144
giganteum Kuetz.; Wittr.......... 165 v. senegalense Nordst...........144
UNA TD aOR 5 oo cede COO D OC Orc U2 opiciipie \elivaa. 5506 qcduade onan oF iH
plobesum INOTdSt. 23/5. 2s cesses nares 74 ; 5
gracillimum Wittr. and Lund...... 116 Te a Peas ae ia
f. majus West and West......... 116 4 hae TRG ce ta Phage
(TUNE IGOUAS VME, ode ob ape D Ow 85 mate ane : ) Teak ee fee
f. gemelliparum (Pringsh.) Hirn.. 85 Pace nen et Witt ) Hi 3a 152
v. aequatoriale Wittr............ 85 v. propinquum (Wittr.) Hirn. .. 19
. v. hohenackerti (Wittr.) Tiffany .152
Wee SUD Walbeals eae gobo d sont 86 :
v. majus Hansg " 96 v. scrobiculatum Ackley........- 152
ES a Os ES eee = A ec Aa macrospermum West and West..... 146
GUNMA NNR UE a. aes fee Ait estan ches 110 aera
; ; MARR USUA WLC Lie is. dege s,s «in sree 68
ma pee ane lplbiials GBrmoarec ee mammiferum Wittr.; Nordst....... is
PORIb ts GU WiSEA 7... ba is owes ee = manschuricum Skvortzow.......--- il
4 ay renee (Gin SHANE Ste cote oe ee Ae margaritiferum Nordst. and Hirn. . ve
Hus IPT? IN\OiCBitas ge cn acne opp es oe MLOMEVMUGEISE elects eee paar nee ale
OAH ICOA SOV Ay Sano taco I IO 165 MEZA POTUM Walitte. t-te heel te a 142
hoersholmiense ln, ames ota ae 150 WLEXICUNIUL WAGE: ee cee 85
howard G. De WES a ops ota ai-yes: 101 michiganense Tiffany.............- 157
v. minus Tiffany............-.- 102 THELESS MN ROHEE. bbls culbidiaeo ado ohne oo 103
huniu Wood........-.... eae 137 mirandrium Skuja...........-.+++- 147
hystricinum Trans. and Tiffany y. .120 MALTON ELC eyy =< a ateneye a= 2 Oe 105
hystrix VTi pig peas ee ett a ee 120 monile Berk. & Harv.; Wittr...... 154.
v. canadense Tiffany............ 121 fy Dorcet Elim ns... seat ooo a: 154
v. subglobosum Wittr........... 121 v. eminens Hirn........:...----- 154
ee fevrGloriense Gur sa WIESte dae or 154
ee aaa nee 2 ae a ie MOniliforme Wittl. 22... 6... 20. 166
igs kere PU oe Oe Cec ia ies 169 montagnei Fiorini-Mazzanti; Wittr.162
ee fie Fed BEES cet tvetiae 160 multisporum Wood..........+++++- 131
ae aan ea 5 150, ep eee ec ame igh ke rd
DECREE ED, 5a Spe hla. gee Sees 166 nonum Wittr.; Tiffany ...........!: 109
Vin PLCMELCTUS TATTMA eee oly setae atc 166 nebraskense Ohashi.........-.+--- 119
UIILIN IID MUL AGU, apes teveiols dors eyes sere 101 mobile Wittr.......-+..2.5+.++00:- 99
TTA dS EWN Ve) Sea 168 We Gouuns lablingls Soa eogaceactet one 100
WESULCO Antico k ee Oeeeen epee weer cree 100 nodulosum Wittr............--+++. 108
IMLCTANCULUIT WIbtl. 204 ss. -0s oe 72 Wg COMMING Nalibotls pgoconocaase5® 108
Wie pemnicin Vittany...o. 2. 2.405. 73 : :
inverse WAGE >.> ec bes coee 100 obesum (Wittr.) Hirn...........-. 12
WRMOMSE VA ANIY cae. YE Aol snct oe es 106 oblongellum Kirch...........----- 116
srregulare Wittr. ..0. 02-0. tfnasts. 131 oblongum Wittr........ we corn 2.8 lajovn.0 x te
v. condensatum (Hallas) Hirn....132 f. majus (Nordst.) Hirn.........
itzt ‘a ; f. sphaericum (Hallas) Hirn..... 117
iizvgsonni De Bary....7-.. =..." - 117 > E 86
f. heteromorphum Hirn.......... 118 oboviforme Wittr.........-..-+-+--
eae Act abso Ah bs 118 GOSOLELILITY WHltien ee reach ot eer i: 69
et Ga ia obtruncatum Wittr...............-155
kirchnert Wittr...... Ren er Mertect oi 116 v. completum Harn............-- 155
Ritute GaS. West.........aM...... 129 v. ellipsoideum Wittr..........- 155
188 THE OEDOGONTACE A E
oelandicum Wittr.; Hirn.........
i BOs JBOTEC..0> «slg eee
ORVZC WAGES ci 3.5 era eee
v. seriosporum (Lager.) Hirn....
oviforme (Lewin) Hirn...........
DACGhVAnariiL Wachter ee eae oe
pachydermum Wittr. and Lund....
paludosum (Hass.) Wittr.........
v. americanum Nordst.........
v. parvisporum Hitn...........
paucocostatum Transeau..........
Vin ALooilos WNibtIBRIN, 5 ala bado mc
paulense Nordst. and Hirn.......
(DOP SPUCVIITE WBGEEDS 551500000805 2080 e
YEA ALBAN FILLE as srt. ch onc ICRC PORTE NCR
PILOSPOMUMAWICSitr tte aoa) she oie) o le
PESO DONTE \UGIEICS 5 55 65 BeOS oa eOOn
v. gracilis Trans. and Tiffany...
PUG PHONE IW Ubi. 2... sem. cs o 2.
plagiostomum Wittr.........+:...
VARCTILGDIDUSMNVUGGIo,. «26 se s)as sei
DIG UNUNEAWHIEG se. . «ss oe cele
its OnimisHiip lathes Ssaeigne goo ad oe
v. continuum Nordst...........
VWaiovemelandie Earn)... 1. 4 .see
DITGainilanO Witt... ..+- 1s. a2 see
Plusvosporumm Wattt.......-..+.-5
Piuae INOTASt...05-.4-- 0s. -eee
poecilosporum Nordst. and Hirn...
borrectum Nordst. and Hirn.......
PrGteWse ATramSCAUs v.46. ~ ool
praticolum Transeau.............
princeps (Hass.) Wittr...........
pringsheimu Cramer; Wittr......
VEN QUONCUIGLUM HlIiniee oe... ele
VieMILONUSLCULVY Wilt bTy. ee )2.. 2 seins
psaegmatosporum Nordst.........
pseudacrosporum Wittr...........
PSCUCOUOS GIO KAI meet): <1: 2). eee
pulchrum Nordst. and Hirn......
punctatostriatum De Bary........
DUNGLOTUVUNVAGL Ie ere cei). eee
PIGS 1 SUNESS Ueto, 8 apa Baio:
DUSTULUMASRCONET eh: es. 2 sae
PMT OTLED NNEC. San Bee abos nondne
PM COHIDK LE NEAL EIEN A 65 SRD ee ae A ao Alec
Vin OU PITUS abaylOnr . Maen. see ee
quadratimatalaseesss.- eee ee
REUUSCH UL NNON oe ROA oa este
reticulatum West and West......
rhodosporum (Welwitsch) Wittr...
fichieraniuny Wemitneery. se) seo...
(UO Nelbile ee Soccoksoonedeonoe
rrulanen weal.) Ale rae:
roth (Le. €l.) Pringsheim.......
TUES GENSA VALI > eae eee
*v. exiguum (Elfv.) Tiffany.....
v. lundelilu (Wittr.) Tiffany....
WWE ULOSHUIMENOLOS Gee ee ere eer 1
f. minutum (Hansg.) Hirn......
fe ROLUN ALT init eee ene
Page
Mipestre Hitt... .so..0 see ee 114
f. pseudautumnale Hirn.......... 115
sancti thome Wittr. and Cleve..... 161
soxatile Hanssen 171
schmidier Gutwinski.......0......- 148
SCVOOIGUICLILIN WAMU Gis eee eee 95
Sclandie Lalas eee eae 161
semiapertum Nordst. and Hirn....124
SexUn gular © levee ee eee 126
v. angulosum (Hallas) Hirn.....126
Vii MGIUSIW alll Ces see eae eae ee 127
SUMaLIGHI Ela Seen ee ee Dy
SUM plexsinn ee Wie one ct ae eee 111
SOGTATEAWiLGET as ee ane ee ee ee eeiere 67
sodiroanum Lagerheim............ 77
Sol; Hires Aes en. Gee eee One 167
Spectabile Winn oi. Pate oer 153
sphaerandrium Wittr. and Lund... .112
Spivale Elim: ie seine © nme cerek ae 123
vi. acuium GS: WeStasee eae ee 123
Wi LALULEW Se ithatayaseesereer ei 123
Spurvum TAirhce ss seca ate eere 164
SOMITE NONE, G5 oA kos ooRecoadb et 127
suboctangulare G. S. West......... 79
SMa aciie Walibnay ss doncnonaoboes Seon
SUEGUGLEINU Will bine a eee eee 68
fewcUsinaleG.. S-WiCSita esse tee 68
USP reMmiun Metta riven e retiree ee 156
tapeinosporum Wittr.............. 159
taphrosporum Nordst. and Hirn.... 97
tentoriale Nordst. and Hirn.......157
tenuissumum Wanse ns. ee sees es 160
Hifantt NC klevanae merece oe 95
trvorcum Woronichin +255. eeeees 106
tumidulum (Kuetz.) Wittr......... 99
ByrOliGunmuWittie see ee ae eee ce 70
uleanwin AGTH OA. Pip econ ele eee 170
undulatum (Breb.) Al. Br.; Wittr. .118
v. americanum Transeau........ 119
f. senegalense (Nordst.) Hirn....119
upsalvense Watts --052 eee eae 77
Wo PAOLO PSB, a5 ncicc 6 asee dc 78
UNDG IWaAtti. «oe ee ee 69
urceolatum Nordst. and Hirn...... 167
varaans Wittr. and Lund......:.... 69
vaucherti (Le Cl.) Al. Br.; Wittr... 76
none Jae >. SSS 5ehnescoeoo cs 164
verrucosum talllas..-.-.+s.ss0c. 95
vesicatum (Lyngbye) Wittr........ 162
VIGLOTLENS Ca Gs Sh WieSitae een oe 129
UUNGE DUT CENS Clase erat nee eee oe 164
wavashense Uithaniy: ae ae erect te ee 156
warmingianum Wittr.............. 169
welwitschii West............-----. 106
WOLLeaniunt Wittte a4 eee ieee ee 135
f. insigne (Nordst.) Hirn........ 136
Vil CONGLINILIOME LAuGiN aster 135
wyliet Tiffany...... eon tte oes oo Oi
eiecag (ClEVE. 4.5. cei ae eee aoe oe 74
- , - - - 2 {
Mok fe PLAT HS. Fs
PLATE L.
Page
Bulbochaete elatior Pringsheim. (Redrawn from Hirn)............... 32
B. elatior f. pumila Hirn. (Redrawn from Hirn)...................... 33
iB. elation vaiscrobiculatal (iitanyven censor ance orn cat eee ear 33
Be crentilataseringsheim-a (Nedrawn tron) Elim) eee eee eee 34
BeintermediaWertBanye yaw. can. ce Ones ce Re eee 35
Baintermedia vad epressaaWtnOCkjs) se ieee ee ee ee 35
Be brebissonii Kenretzimecie (Atiber sel) eres Siete caste eine ete 33
B. furberae Collins. (After Lewis, in Collins 1918a).................. 34
BaminutawWest and: \WestascAntem Genoa VWViCSt) mane iar aig. eer eae ae
190
PEATE al:
Page
Fig. 10. Bulbochaete borealis Wittrock. (Redrawn from Hirn)............... 37
Bicein se polwanariar© leve,, wath! Oogomias 2.4. cee hes eas oe Be uel 38
Fig. 12. B. polyandria Cleve, with androsporangia. (After Wittrock)........ 38
Fig. 13. B. polyandria f. notabilis Hirn. (Redrawn from Hirn)............... 38
Fig. 14. B. angulosa Wittrock and Lundell. (Redrawn from Hirn)........... 36
Fig. 15. B.subintermedia Elfving. (Redrawn from Hirn).................... 36
Fig. 16. B. diamesandria Nordstedt and Hirn. (Redrawn from Hirn)........ 38
Biel /e aro MOnd steatiinWiLLTOCle. re Glo. Ss 22 Ovleb ood asa nd weRinae ee ndee 37
nie. 18, Bb. nordstedtit. suberectavCollans, . ...5....25 2. alate es os wee oe nee 37
191
PLAGE Ta:
Fig. 19. Bulbochaete sessilis Wittrock. (Redrawn from Hirn)............... 39
Hise 205 -B-ssessilisii, clabraHim. (Redrawnitrom: lian) ose ee ae 39
Fig. 21. B. elachistandria Wittrock. (Redrawn from Pringsheim)............ 39
Bige 225 /Bagquadrataywitinock., ((Redrawn) iromipiinn)e. sees ele ee ee 42
Rist 235 eB dispar wattrock<. ((Redrawn' from) Elirn)eaeee Geena ae 40
Figs. 24 and 25. B. dispar v. ripartiana Wittrock. (After Hirn).............. 41
Bis. 205 Be obliquavizundelll ss (AtiGer Elim) pes. a neer eeeaee eee ee 39
PLATE IV.
Page
Fig. 27. Bulbochaete valida Wittrock. (Redrawn from Hirn)................. 42
Fig. 28. B.crassiuscula Nordstedt, with androsporangia. (After Nordstedt).. 41
Fig. 29. B. crassiuscula Nordstedt, with oogonia. (After Hirn)............. 41
Bis. 30) 8B. pyrulum Lundell?” (Redrawn from, Him)... cae eens tee 43
Fig. 31. B. punctulata (Nordstedt) Hirn. (After Nordstedt)................- 41
Riva! et CLASSAS Pines eMiiMens ere ence eye rok otasin che = Mao sea cre Mee son ee 4]
193
PLATE V.
Higsessandinl seep ll bochaetelcongenen Elirms sy) eerie a eee 42
igs es) ancdobsbwoipanteasbringsheiml an somre eee eet rere ie: 38
Rigel. ob asetigeran (kota) eX carcino) seer oe) ee ae eee eer eee 40
HigetaS. - Bs alabamensis transeauiand Browtls.55 4 44) eee eee ee 40
194
————E—
Figs.
39 and
1.
PLATE VI.
40. Bulbochaete doliiformis Borge.
rere ees =: Sy OID CAs EAI NEA ea feet 53.02 bi Doce A Dai see Wal Se oem eiRoaaae =
Rig. 42. B. horrida: Nordstedt:, «(Redrawn fromyHirn) .. ..24.-.-saa- sse--so< 50
Ei oAS Soe LECLANS ALIS WWhlGbEOGKe me ayes ces cist keiel pers Go. caste evecare erties or o1alebes = 45
Fig. 44. B. rectangularis v. hiloensis Nordstedt. (After Hirn)............... 45
Bis. 45. B. anomala Prinesheim. (After Pringsheim)....2e..+-«225-.-20+- 48
Hie 46; JB; lasoensis Wittrock. ((Redrawn from), Hirn)):5 soe ace senc os sie - 46
ira eee LCDAN GALLE EOC Kemet op lecee rach eae eiouck x, Sete vsuey a eae ap hecsrcbents Ie = 44
Biter AS eee ye Vahl ATS Vil te ROC Kee ie nL PENPae Ss, lor ceeea MOE ers. otayaenena co «Peters 45
Bigs 49") Bs vatians: vy. subsmaplex (Wittrock) Him. 27. 2.2.0: «> sites see eee 45
Hiee50) ob. Varians) va nawalensis Nonrdstedti... ssc cass cis nia vate oon aeaaeeen 46
Fig. 51. 3B. denticulata Wittrock. (Redrawn from Hirn)..................... 48
195
PLATE VII.
Figs. 52 and 538. Bulbochaete bullardi Transeau and Tiffany.................. 47
Pict4:. > Bminor Alyeb raunWatttOCls.» \5.°. onc: 5s «ae eee neta ce ee 47
Pigs 55, .Baminorsygesmanica Harn. “(After Himn)e eer ae ee eee 47
Fig: 56., “Bi breyitultasWattrock:. (Redrawn from Hirn)e sea (2. ee
Figs. 57 and 58. B. spirogranulata West and West. (Redrawn from G. S. West) 49
Fic. 59. B. tenuis (Wittrock) arn \(Redrawn fromHim)),. © gee
Fig. 60. B. tenuis v. norvegica (Wittrock) Hirn. (Redrawn from Hirn)...... 44
Fig: 61. “Biafinis Hiroe o(Rhedrawn from Him): 9.) 2) eee ee eee ee 48
196
PEATE ViIr-
Z ESR as
SS Saeeers= a
Tireqdy
Page
BHies62)) (Bulbochaeteinsignis| Pringsheim:: 2 5.04. secs os eck see eh eis 48
Fig. 63. B. insignis v. reticulata (Nordstedt) Hirn. (After Hirn)............. 49
Bie.64.) 5. imperialis Wittrock.) (Redrawn from Firm)... .4.22...-5-55--2-: 49
Fig. 65. B.imperialis v. regalis Wittrock. (Redrawn from Hirn)............ 49
Hiss 065 eb Lnadinospora Wiattrocken. (Atte Elite .o..cr ae eeu eeiieckens ar 46
Fig. 67. B. rhadinospora f. antiqua (Nordstedt) Hirn. (After Hirn)........... 46
Bie--bs. Birhadinosporatyv. litoralis Him. .. (After Hirn) 500i os 3. nes Jes 2 ee 47
197
PLATE IX.
BEoawon
Fig. 69. Bulbochaete mirabilis Wittrock. (Redrawn from Hirn)...
Fig. 70. B. mirabilis f. immersa (Wittrock) Hirn. (Redrawn from Hirn)..... 32
Fig. 71. B. mirabilis v. gracilis (Pringsheim) Hirn. (Redrawn from Hirn).... 32
Fig. 72. B.monile Wittrock and Lundell. (Redrawn from Hirn)..,.......... 30
Fie. 73. B: monile vy. robusta Him. (Redrawmn from Hirm)) ee 3... 0
Fig: 74: B. basisporaWistrock and Lundell. cn. .cos eee eee een ante 31
Fig. 75. Bi '‘nana Wittrock. (kedrawn trom: Hirn) (nc. saae ues |e ees 30
Fig. 76. B.megastoma Wittrock and Lyndell. (AfiterawWattrocls) 11. ae eee 31
Fig. 77. B. debaryana Wittrock and Lundell. (Redrawn from Hirn).......... 31
198
PLATE X.
Avy SO MICRONS
Figs. 78-83. Germination of oospore of B. elachistandria Wittrock. (After
Pringsheim)
Figs. 84-92. Development and germination of zoospores of B. varians
Wittrock v. subsimplex (Wittrock) Hirn.
Figs. 93-98. Development of bristle and first cell division of a germinated
zoospore of B. setigera (Roth) Agardh. (After Pringsheim).
Fig. 99. A young plant of B. setigera (Roth) Agardh showing manner of
branching: a, Primary filament developed from zoospore. b,
Branch of the first order. c, d, e, Branches of the second, third,
and fourth order, respectively. (Modified from Pringsheim).
199
PLATE XI.
110
111
5SOMICRONS | 107
Page
HigslOOm Oedoconiumilacves Witt...) . dec. pile ae eee oe Oto ee ee 65
Fig. 101. Oc. cryptoporum Wittr..... ee a onc nig uiticia Mei nuenins aos A 65
Fig. 102. Oc. cryptoporum v. vulgare Wittr. (Redrawn from Hirn)........... 66
Basse 103 andiO04aOeacunvumyPcingsht ass) ee eee eee eee 65
Pigsedl05:) \Oexrufescens Watt.) (Redrawn tromubtinn) see eee ere eae 66
Bice 1065 (Oehnufescenssyzpexiouiml (PE live)paiiiany 9) ee eee eee ere eee 66
Fig. 107. Oe. rufescens v. lundellii (Wittr.) Tiffany. (Redrawn from Hirn).. 66
Biss 108 Oc. calcareuml@leves “((kedrawm trom Elinn) ee. ese see ee eee 67
Biss 1098 WOex sociale! Witiree(Nedratwaneirorm:) Elin) eee aes serene cere 67
Bice 1105 sOesanerme Eitcanes (Nedrawnieomaleiincn!) eee ee a eee eae 166
Fig. 111. Oe. inerme v. mentiens Hirn. (Redrawn from Hirn)............... 166
200
PLATE XII.
| 5O MICRONS |
Page
Figs. 112 and 113. Oedogonium cymatosporum Wittr. and Nordst. (Redrawn
(Gtonaat Healing) . Oexmaonusin Wattre ((kedrawnitromi Jeli) oe. ict cise ee ee 68
Boon Ga OCS SUCCICUIMMVWAIG bina ten 0. 5% Bel ore i iae os es Epic ees 68
Fig. 117. Oe. suecicum f. australe G. S. West. (Redrawn from West)....... 68
Figs. 118 and 119. Oe. urbicum Wittr. (Redrawn from Pringsheim)........ 69
Bical Z0 nO ezvarianse Wit timeline uly Ute We. estes = Sirs. Sum Sistetas ciaveuc: =sucleiniaistenseastialené 69
Rica Oesobsoletum Witte —Gkednamimn trom: Elimn)ene.- 6. 2. eee dee 69
Fig. 122. Oe. plusiosporum Wittr. (Redrawn from Him).................... 70
lines, UPB. KOGA n Ra) WVerTnTe Wine Geee a . One el cio gantin cer aes Hears cial oo Eee TIA 3 otro ole cine 70
PLATE XIII.
129
Page
Figs. 124 and wo Oedogonium cardiacum (Hass.) Wittr. (Redrawn from
IE L:ieti}) Me hoe ee Asch oie Sake ae ein ee ohn lal PRO Ene Cee ieeers 70
Fig. 126. Oe. cardiacum f. pulchellum (Hass.) Hirn. (Redrawn from Hirn).. 71
Fig. 127. Oe. cardiacum f. interjectum Hirn. (Redrawn from Hirn).......... 71
Bic. 1285 'Oencacdiacumey, carbonicum Wittt....-.0- s4ee eee oreear al
Bien 1295 (Oencardiacumavesminius) IZeminuepe ey: eee oe ae er eee or 71
Fig. 130: Oc. glabrum Hallas: (Redrawn from Hallas): 377.222: sae 2h as 72
Pigs i3t: Oexfranklinianum)Wittr.n].- sac osetia Cee ae aire aioe Net 71
202
PLATE XIV.
140
142
| SOMICRONS
Page
Figs. 132 and 133. Oedogonium lautumniarum Wittr. (Redrawn from Hirn).. 72
Bigmls4e ae © Caintermeai lim Waitin se ot miskat aie 3% sisson olsbese stwienecachscaramts » spoktels 72
Biceslan se Oceintermediim yy tennicumdniianye «come eeeeiae nes 42 eee 73
Fig. 136. Oc. hirnii Gutw. (Redrawn from W. and G. S. West).............. 73
Bigs ls7. Oc. hirnit Gutw.” (Redrawn from Gutwinskt) 0... 5... .2e ee con 73
Bieeel so Oe whitniinve airicanUn Gonos WES basa coe seuic so oes poeta oe Ome 73
Bice 139. (Oc. globosum Nordst. (Redrawn from Him) 2). soy... saieem ee. eh 74
Fig. 140. Oe. plagiostomum Wittr. (Redrawn from Hirn).................... 80
Bigs: 141 and 142." Oe plagiostomum v. gracilius Wittr.........2.-.......--+% 81
203
PLATE XV.
Figs. 143 and 144. Oedogonium zigzag Cleve.
Big. 1452, s@ermrapilewwiittr. 0 5... 5 jueves ae bide ck ae tie Teena ee
Fig. 146. Oe. fragile v. robustum (W. and W.) Tiffany.
NVIGSIC) eerie eet, Bes so, «ahs cla a renin « Ue Renee oe
Fig. 147. Oe. fragile v. abyssinicum Hirn. (Redrawn from Lelio) een aay caees ths)
Fig. 148. Oe. warmingianum Wittr. (Redrawn from Hirn)...................169
Fig. 149. Oe. curtum Wittr. and Lund. (Redrawn from lim) ia Sepckein ee 74
Figs. 150 and 151." ‘Oefvaucherii (Le'Cl.) A. Br? Witte). 2. GG
204
PLATE XVI.
152 | 50 microns | 156 |
SLELECHAY,
Page
His. 1525) Oedogonium oviforme.(Wewin) Flt. os 5 achieve 02k doe eo mdeaib oe ox 78
igs oorandlo4a Oe, Sodinoanumylacerhwe ran 55s sons Aa. a eee 77
Biceivoes Gea Seniculalam Mutts cic. picts caress Reha hai Osco 0s 3 Ss ek 78
Fig. 156. Oc. richterianum Lemm. (Redrawn from Hirn).................... 76
Peal Se Oem PSAlleHSe wk tie goss Sciacca ere ee alos, « hashes cw ws heen hee OU.
Fig. 158. Oc. upsaliense v. fennicum Hirn. (Redrawn from Hirn)............ 78
205
PLATE XVII.
159 160
5O MICRONS
THEF ANY
Fig. 159. Oedogonium martinicense Hirn. (Redrawn from Hirn)............. 79
Fig. 160. Oc. suboctangulare West and West. (Redrawn from West)......... 79
Figs. 161 and 162. Oe. biforme Nordst. (Redrawn from Hirn)............... 83
Pic. 163... Oevkurzit Zellers) (Redrawm fromy Ein)” one ose eee eee eee 79
206
PLATE XVIII.
Figs. 164 and 165. Oedogonium.capillare (L.) Kuetz........0..5...-000000e00-: 80
Fig. 166. Oc. capillare f. stagnale (Kuetz.; Wittr.) Hirn. (Redrawn from
Ei i. cers teeta ee itn sate als ns s Sees ante 80
Pies.) 16/—169. .Oe.. princeps, (Hass. WW ititieiaece is acts at os Sul. eels ees 82
hisses Orancdyly le Oenanomalumebiicns sem. ees oe a ae ve - ici tre errno 83
207
PLATE XIX.
Bigs, l/2iand vo: Oc. capilliforme Kuetz.: Wattrs... 595-2) ooo eee $1
Fig. 174. Oe. capilliforme f. debaryanum (Chmiel.)'Hirn. /7.2..98......../)..2 81
Fig. 175. Oc. capilliforme f. lorentzii (M.& W.) Hirn. (Redrawn from Hirn).. 81
Figs: U/Gand whi, Oexcapilliformely. australe Wittrasss2ss ole eee 82
Fig. 178. Oe. capilliforme v. diversum (Hirn) Tiffany. (Redrawn from
Vic bs i) lesen ee ee ram ee meeerpT ee- CA SUA) FOUM Sl ee he oe 82
208
a
PLATE XX.
L_|
181
| 5O MIcRONns
Page
Figs. 179 and 180. Oedogonium pachyandrium Wittr. (Redrawn from Hirn).. 84
Figs. 181-183. Oe. subrectum Hirn. (Redrawn from Hirn).................. 87
Figs. 184 and 185. Oc. oboviforme Wittr. (Redrawn from Hirn).............. 86
Fig. 186. Oc. pseudoboscii Hirn. (Redrawn from Silfvenius)................. 76
Fig. 187. Oc. lageniforme Hirn. (Redrawn from Hirn)...................... 168
PLATE XXI.
50 Mic ROWS |
Figs. 188 and 189. Oe. mexicanum Wittr. (Redrawn from Hirn)
Bigs 190: (Oe oryzae Witt. (Redrawn from Him) etl ee ee
Figs. 191 and 192. Oe. oryzae v. seriosporum (Lagerh.) Hirn.
itig Oaths B00) Ae i CPR ion NO UL au Re Ge 164
210
PLATE XXII.
5O MICRONS
Figs. 195 and 196. Oedogonium- grande Kuetz.; Wittr......................... 85
toa O7eee OC MOTANG EC, MAUS I ansonee eyed, e's oti «wba i# « cies oe eee 86
Figs. 198 and 199. Oe. grande v. angustum Hirn. (Redrawn from Hirn)...... 86
Fig. 200. Oe. grande f. gemelliparum (Pringsh.) Hirn. (Redrawn from
NFeAiicera|) iy ewe to ay fils ere once co re ERR RE coe OE: oa i rd ste ORME ware Ue 85
Fig. 201. Oe. grande v. aequatoriale Wittr. (Redrawn from Hirn)............ 85
211
PLATE XXIII.
202
Tier aly 50 MICRONS
Figs. 202 and 203. Oedogonium crassum (Hass.) Wittr
Figs. 204 and 205. Oe. crassum f. amplum (M. & W.) Hirn. (Redrawn from
Flamer) estrone: Cele astsn wes Shon 6 seks, ae ee EEE EE oe 88
Figs. 206 and 207. Oe. crassum v. subtumidum Hirn. (Redrawn from Hirn).. 88
ho
i
to
PLATE XXIV.
Fig. 208. QOedogonium crassum v. longum Transeau...................----:--
Figs. 209 and 210. Oe. rivulare (Le Cl.) Al. Br. (Redrawn from Hirn)....... $4
Hiecealieancdest2. Oe. landsborourghin (Hass: eWiattienee. a: 2 .-+ oa 87
Figs. 213 and 214. Oc. landsboroughi v. norvegicum Wittr.................... 87
PLATE XXV.
Figs. 215 and 216. Oedogonium fabulosum Hirn. (Redrawn from Hirn)....... 83
Figs. 217 and 218. Oe. fabulosum v. maximum (West) Hirn. (Redrawn
1 tOvoay NARS) ee ee a A Cee eke Wy ba onan Site gio U sc $3
Fig. 219. Oe. fabulosum v. columbianum G. S. West. (Redrawn from West). 84
Fig. 220. Oe. angustissimum West and West. (Redrawn from West)......... 160
(This plate presents a comparison between the largest and smallest species
of Oedogonium. )
214
PLATE XXVI.
=
(ey
ER Sg
S5SOMICRONS
TIFFANY
Page
~ Figs. 221 and 222. Oedogonium leiopleurum Nord. and Hirn. (Redrawn
(encima coma ea 423 e Lee e Se OD eS ee eR! Tin 91
Fig. 223. Oe. kjellmanii Wittr.; Hirn. (Redrawn from Hirn)................ 89
Fig. 224. Oe. paulense Nord. and Hirn. (Redrawn from Schmidle).......... 90
Pesos adie. Oe! bosell (uel) Witte... s,s chs a ee 91
Figs. 227 and 228. Oe. boscii v. occidentale Hirn. (Redrawn from Hirn)..... 92
Fig. 229. Oe. boscii v. notabile Lemm. (Redrawn from Hirn)................ 92
Fig. 230. Oc. bosciif. dispar Hirn. (Redrawn from Hirn)................... 91
Rigscol or ee. palidoswar (Elass.) Witte... oss ceo... s.deteed dee eae. 90
5 RT tors © RETIRES a a 90
Fig. 232. Oe. paludosum v. parvisporum Hirn
215
PLATE XXVII.
Page
Fig. 233. Oedogonium paludosum vy. americanum Nord. (Redrawn from
TEN figtnt) eh ae ciate scene sf cs = ay acoveverd ean atte sa.to (RUNGE eRe NST OE Cece 90
Fig. 234. Oe. margaritiferum Nord. and Hirn. (Redrawn from Hirn)......... 92
Figs. 235-237. Oc. exocostatum Tiffany........ Se ee oe acho 4 emo 89
Figs. 238 and 239. Oe. urceolatum Nord. and Hirn. (Redrawn from Hirn).... 167
PLATE XXVIII.
5O MIicRONS
Figs. 240 and 241. Oedogonium crenulatocostatum Wittr...................... 92
Figs. 242 and 243. Oe. crenulatocostatum v. longiarticulatum Hansg.......... 93
Bice 244eOe. crenulatocostatuml ft cylingr1 cui bit) da 2 ee ete ae 93
Fig. 245. Oe. crenulatocostatum v. aureum Tilden. (Redrawn from Hirn)... 93
Fig. 246. Oc. dictyosporum Wittr. (Redrawn from Hirn).................... 94
Fig. 247. Oe. arcyosporum Nord. and Hirn. (Redrawn from Hirn)........... 94
Figs. 248-250. Oe. areolatum Lagerh. (Redrawn from Hirn)................. 94
Big. Zot. Wer hochnel Gorze. “Rkedrawn from Borge)... ... 5.00005 222s eens 165
PLATE XXIX.
SO MICRONS
Page
Fig. 252. Oedogonium foveolatum Wittr. (Redrawn from Hirn).............. 95
Rigs\ 2bsrandio4sOewargenteuml rir. 4 0 ace eon eee ere het 96
Figs. 255 and 256. Oc. punctatum Wittr. (Redrawn from Hirn).............. 96
Fig. 257. Oe. capense Nord. and Hirn. (Redrawn from Hirn)................ 166
Figs. 258 and 259. Oe. scrobiculatum Wittr. (Redrawn from Hirn).......... 95
Fig. 260. Oc. giganteum Kuetz.; Wittr. (Redrawn from Hirn)............... 165
PLATE XXX.
euerer"e
269
5O MicRows
Page
Biss. 20L roa Oedoronitmnitifianit AGiley on iyi. cians adeilss 0 eek hide PDaees 95
plese oie OPA WHlel) DiltAtiys mac maerrr cian Se aun ns Inqms eons ls 6 Glens 3 97
Figs. 268 and 269. Oe. pseudacrosporum Wittr.
PLATE XXXI.
iat
—
Teg dly 5O MICRONS |
Page
Figs. 270 and 271. Oedogonium taphrosporum Nord. and Hirn. (Redrawn
PROMIMELUTI)': 2.9.5 30 oo 8 lk ood Ss 8 Ss oe ge ee ee 97
Figs. 272-274. Oe. verrucosum Hallas. (Redrawn from Hallas)........:..... 95
Figs: 270 ande276. (Oexamericanim Iiranseau. eo. eee ee C7
PLATE XXXII.
Z
\
ZEEE
Page
Bie. 277. Ocdogonium paticocostatumy Transeaw 2... 625525. ee ee etn s 98
Hine? (ole. paucocostatuim, v- eracilisnUiilanyie. jcc ine cn cs se en's oan 98
nies) 279s OecanopilesWittra (eedrawninom Elin) hea. 2 - ce te oe ee 99
Fig. 280. Oe. nobile v. minus Hirn. (Redrawn from Hirn)................... 100
Figs. 281 and 282. Oe. tumidulum (Kuetz.) Wittr. (Redrawn from Hirn).... 99
Figs. 283 and 284. Oe. australianum Hirn. (Redrawn from Hirn)............ 99
221
PLATE XXXIII.
SS.
WEBES as
SO MIC AONS |
Fig. 285. Oedogonium insigne Hirn. (Redrawn from Hirn)
Bick SoG Oensolebinnn ss dvednawar tromigelimt) seperate eee ae
Bigs Zs pan 2oom .Oc. tatiusculum. Tiffany. oo. ssc ee eee oe
Bisse 280-797seeOesinhimum alittaniye.. y 6c) cee ce ce ee eee oo mane
Fig. 293. Oe. howardii G. S. West. (Redrawn from West)
Hiss 294 (Oecshowardilvaminis (Mitianya se) ene ei eee ee etic aire
Bigss 295=20 en Oevinversum Witth. 2) ocarns ace o ¢ seetoet yee celeste reer sore
PLATE XXXIV.
312
298 is oes cae ete
Tier any | 50 Mic Rows | 318
Page
Pigs: 298 and’ 299: @edogonium pratense Transeaus.....0:05-5.. 221.2220. ees 102
nies 3005) Oeh acmandrium Eliv. (Redrawntromelirn)) 25. ... 5... 2... ees 103
Fig. 301. Oe. psaegmatosporum Nordst. (Redrawn from Hirn)...............108
Pigs ORE. “(OSS TeeVb NTIS AWARE, vn Os G10 cho bared Oo. Shale” e: cr ceed ac ce ee ano nee eee 103
Figs. 303 and 304. Oe. punctatostriatum De Bary. (Redrawn from Hirn)....104
Fig. 305. Oc. poecilosporum Nordst. and Hirn. (Redrawn from Hirn)........168
Figs. 306-308. Oe. quadratum Hallas. (Redrawn from Hallas)...............105
Figs. 309 and 310. Oc. calvum Wittr. (Redrawn from Hirn)................. 169
Bisall. ‘Oe. fusus Hallas. (Redraw from Hallas), oj) )pcgoe-s euon wees ren es 9 LO
Fig. 312. Oe. inconspicuum Hirn. (Redrawn from Nordstedt)............... 1€0
ere) MONE UINIC OTIS ENT ESITNY EMT ANR SD sys Licctt, ch Mobay oy oie: « sage ote consents «kk Y 2 5 eed ps 160
Risen iO C MLADEINOSPOLUM= WiGttnans thie fee cies cleus: alete tals, 6 shteinelscianhels 159
Fig. 315. Oe. capitellatum Wittr. (Redrawn from Hirn).....................104
Hise Son Ocwousilamekeirolimen srarrrers Ais aye oa pringsheimii v. nordstedtii Wittr.. 5.25...) 5.. 20) eee 108
Fig. 331. Oe. pringsheimii v. abbreviatum Hirn. (Redrawn from Hirn)....... 107
PLATE XXXVI.
3843 345
50 MICRONS
Fig. 332. Oedogonium petri Wittr. (Redrawn from Hirn)..................--105
Rievacs, Oe, spurium Har. |-(Redrawn trom Barn). 00.0 7s... 2... 2-2 lee 164
Pics geatbamGl seb, COesitincatien Iabbad, 55 ooo ea seb Same 6 eo Doe EOmemanon So ler 105
Fig. 336. Oe. virceburgense Hirn. (Redrawn from Hirn)...............-.--. 164
Fig. 337. Oe. sphaerandrium Wittr. and Lund. (a. After Borge. b. After
INOS CEC) eee ere rae tn EPI te eter sole oe nas et riots ones creer 112
Fig. 338. Oe. pithophorae Wittr. (Redrawn from Hirn)................------ Te,
Bye. 339. Oc. loricatum Him. (Redrawn from Hirn)..............22.-+-505 111
Fig. 340. Oe. simplex Hirn. (Redrawn from Hirn)................+-.++.++-- 111
Fig. 341. Oe. autumnale Wittr. (Redrawn from Hirn)...................+--- 112
Migssete and e40, Oc. nanum Wittr.s Dittany.c 6... 26s de. ed eee eee nee aes 109
Iie. GaN “COGh jeianive men Shina: 3, wee o seo ¢ oa DEO Oe seg ocieda cos waco! 105
Fig. 345. Oe. rupestre Hirn. (Redrawn from Hirn)..............-+++.-+++++> 114
Fig. 346. Oe. rupestre f. pseudautumnale Hirn. (Redrawn from Hirn)....... 115
225
PLATE XXXVII.
Tera) | SOMICRONS
Page
Fig. 347. Oedogonium obesum (Wittr.) Hirn. (Redrawn from Hirn)......... 112
Fig. 348., ‘Oel'pyriforme Wittr. (Redrawn from Hirn))).2 995. eeu eee 110
Bis. 3495) Oerpyrulum Watts. ((Redrawnitirom Elin) ee eee eee ee ee eel oul
Rizs50s Ocypynulumeyzamplius Maylore)) ys) see eee eee eee 111
Riese lsandiao2e sO ewelwitschiinvWeste ae 0 te oe eee Teenie etn eee 106
IMsgone sn OG HONS Ine Cae aacdaooddobecaspecc oon oncuocodvec sonds 106
Bigs, 06 and 307. ‘Oevdioicum Carter. (After Carter)! 3.2. 107
226
PLATE XXXVIII.
ee
Page
Fig. 358. Oedogonium ahlstrandii Wittr. (Redrawn from Hirn)......*..si>2..115
Fig. 359. Oe. selandiae Hallas. (After ERS) eee, SO RED 161
Hig. 360. Oe. sancti thomae Wittr. and Cleve..°.-..................-. pee te 161
Fig. 361 and 362. Oe. porrectum Nord. and Hirn. (Redrawn from Hirn)...... 109
Figs. 363 and 364. Oe. pisanum Wittr. (Redrawn from Hirn).:........- 109
Figs. 365 and 366. Oe. pisanum v. gracilis Trans. and Tiff.................. 110
eee Oevoploneum Wriire me unsere ee. or OTR ae Ty 117
Pigs. 368 and 369. Oe. oblongum f. sphaericum (Hallas) Hirn. (After Hallas) .117
Fig. 370. Oe. oblongum f. majus (Nord.) Hirn. (Redrawn from Hirn)........117
Fig. 371. Oe. kirchneri Wittr. (Redrawn from LATTA) 8s 6 cer een Bek cc ote oe ete TT
Fig. 372. Oe. oblongellum Kirch. (AttenW: and GS. West). .ii...0... 50. <. 116
Higeefe.. Oe pracitmum-Wittorand Lund:..........22.::... 0s rcchlccek.. 116
227
PLATE XXXIX.
Figs. 374 and 375. Oedogonium nodulosum Wittr. (Redrawn from Hirn)..... 108
Fig. 376. Oe. nodulosum v. commune Hirn. (Redrawn from Hirn)........... 108
Figs. 377 and ace Oe. pachydermum Wittr. and Lund. (Redrawn from
SUS en) seed easily CPR aa cose an sitio Stn B 115
Figs. 379 and 380. Oe. itzigsohnii De Bary. (Redrawn from Hirn)........... iLily
Fig. 381. Oc. itzigsohnii f. heteromorphum Hirn. (Redrawn from Hirn)...... 118
Fig. 382. Oe. itzigsohnii v. minus West. (Redrawn from West).............. 118
Bigs, Seo-co0. Oc ailammitenume Watt NOL .. os sce ee eee meee erates 118
228
PLATE XL.
5O MICRONS
Page
Figs. 386 and 387. Oedogonium vesicatum (Lyng.) Wittr. (Redrawn from ‘63
TEetiacralh) ees 0 oh a ena pee See oie) ET RE Sh tS ~. os aass Peapeansevonanecdie
Figs. 388 and 389. Oe. rhodosporum (Welw.) Wittr. (Redrawn from Hirn)...162
Figs. 390 and 391. Oe. montagnei Fior.-Mazz. (Redrawn from Hirn)......... 162
Figs. 392 and 398. Oc. pluviale Nord. (Redrawn from Hirn)................. 150
Fig. 394. Oe. flexuosum Hirn. (Redrawn from Hirn)........................163
Fig. 395. Oe. pilosporum West. (Redrawn from West)....................-. 165
Fig. 396. Oe. consociatum Collins and Hervey. (Redrawn from Collins)..... 167
Bisse Oesinchisumrinia (iedrawniromsblann)).....0...9¢.0s-es seem ene 169
229
PLATE XLI.
402
| 406
5O MICRONS
; Page
Figs. 398 and 399. Oedogonium velatum Hallas. (Redrawn from Hallas)..... 164
Figs. 400 and 401. Oe. implexum Hirn. (Redrawn from Hirn)............... 153
Rigs 4025 Oestonticolavals Bre (Redrawmnitcona Elinm) eee ee ee 163
Figs. 403-405. Oc. spectabile Hirn. (Redrawn from Hirn)................... 153
His 406@ EO es reinschigRoy oradic cc ae way Aes oc et eA eee ee 172
230
PLATE XLII.
Page
Fig. 407. Oedogonium undulatum (Breb.) Al. Br.; Wittr. (Redrawn from
Le bia) Jess Be Oe become tos Gin oc Hod ob. oo hb OkeRE Oley Ob: og eg Ee ea 118
Ee 40550 Oe. undulatumiy, americanumidirans 26. sees. ase). se eee ee 119
Fig. 409. Oe. undulatum f. senegalense (Nord.) Hirn.........................119
Figs. 410-413. Oe. nebraskense Ohashi (slightly on larger scale)............ 119
231
PLATE XLIII.
5O MicRrows
Page
Fig. 414. Oedogonium hystricinum Transeau and Tiffany............ Sk MR 120
Fig. 415. Oe. armigerum Hirn. (Redrawn from Hirn)....................... ise.
Fig. 416. Oe. aster Wittr. (Redrawn from Hirn)........ I 120
Fig. 417. Oe. hystrix Wittr. (After Wittrock)................ es a 4 EP 120
Rig: 418; Oex hystrix-y- eanadense Tiffany: =: . 2... <5. seen ee eee 121
Fig. 419. Oc. hystrix v. subglobosum Wittr. (After Wittrock)............... 121
Biss. 420 and 421. Ge. echinospermum:Al. Br. :.. 5... Jo scene eee ce es es 121
Fig. 422. Oce..echinospermum v. horridum Hirn. (After Wolle).............. 122
PLATE XLIV.
Fig. 430. Oe. spirale y. acutum West and West. (Redrawn from West)....... 123
Figs. 431-433. Oe. illinoisense Transeau. (Redrawn from Transeau)......_.. 123
233
PLATE XLV.
50 MIC ROWS
Page
Figs. 434 and 435. Oedogonium lindmanianum Wittr. (Redrawn from Hirn)..133
Fig. 436. Oe. echinatum (Wood) Wittr. Oospore. (After Wood)............ 133
Fig. 437. Oe. donnellii Wolle; Hirn. (Redrawn from Hirn).:................ 132
Figs. 438 and 439. Oe. donnellii v. wittrockianum Hirn. (Redrawn from
Nab cal) Wives Side cee ee eae a RRR ieee | ree a Ne ee 132
Fig.440. Oe: hispidumyNoerdst. (Redrawn'from Hirm)i2). 400) en. see 137
Fig. 441. Oe. stellatam Wittr. (Redrawn from Hirn)).......)....5..0. 2... 27,
234
PLATE XLVI.
450
SO MIcRovs ec ady
Fig. 442. Oedogonium manschuricum Skvortzow. (After Skvortzow)........ 126
Fig. 448. Oe. cleveanum Wittr. (A, antheridium; S, dwarf male stipe)....... 138
Fig. 444. Oe. cleveanum Wittr. (Redrawn from Hirn)....................-..138
Fig. 445. Oe. semiapertum Nord. and Hirn. (Redrawn from Hirn)...........124
Fig. 446. Oe. depressum Pringsh. (Redrawn from Hirn).................... 124
Biel pe Oe irrer laren Wittihwa tas wea wate: «aise hie bales tomes tre lele ean eee 131
Figs. 448 and 449. Oe. irregulare v. condensatum (Hallas) Hirn. (After
ETE as) poner eee penn wir mre ee ER mossersee amie 132
Beso) aah to OC A EINIISPOCUM BW COG. a a's ce ee we oe pO os 131
fae 42.) Oc. tanltisporum v.maonium Ackley: . 0... 6. a. obs ee kn eee wae eens. 131
235
PLATE XIVII.
5O MICRONS
Page
Fig. 4538. Oedogonium gallicum Hirn. (Redrawn from Hirn).................124
Fis..454.Oensexanculare (Cleves voi ts.c sc beside b NO EL eee eee 126
Figs. 455 and 456. Oe. sexangulare v. angulosum (Hallas) Hirn. (After
Vedas pictus cos einen’ kc mandate suate cess Bea aud, 7 eae NE a ae Pe ee 126
Fig. 457. Oe. sexangulare v. majus Wille. (Redrawn from Hirn).............127
Irters YS}. | COKE, lohetclbrovhl, INGEN AD rebakerMno Lise aa baad elected anes Beet Ne ceae ate 125
Pie 459 ee Oexpratiniigy-sZenneri dit anyerer ee sei eee ae eee ee ee 125
Figs. 460-462. Oe. braunii v. hafniense (Hallas) Hirn. (After Hallas)....... 125
236
PLATE XLVIII.
ee MICRONS |
Page
Fig. 463. Oedogonium alternans Wittr. and Lund. (Redrawn from Hirn)..... 128
ies 404. OCacCOntOriumubial Asm mCAunbeTty El allllas)) coe is oe tae we acts als Gayot aebeue 147
Eigse 405-405-558 Oe; diintit Woods (Attem WOO). -2 sane ous. sos one elton
Hieaoows Oes borisianumy, (ve Clo) eWiattres ser er ht tue. d ve ld ana wie eee 128
Fig. 470. Oc. borisianum v. westii Tiffany and Brown........................ 128
237
PLATE XLIX.
474 475
473
471 50 MIcROWs
Page
Ris, 4a Oedovonium flavescens) (Hass: )/ Witten.) ee ere eae nee 125
Pig. Aj2e Oersilvaticum blallas, (Atter Haillas)e.... =e eee yee We
Fig. 473. ‘Oenvictoriense G'S. West. (After West), =. 975) 5.04. sne eee eee 19
Rise 474ae Oencrassiusculumy Wattr. 2 Je. 5. : ee eee ee eee 129
Figs. 475 and 476. Oe. crassiusculum v. idioandrosporum Nord. and Wittr....130
Fig. 477. Oe. crassiusculum v. cataractum (Wolle) Tiffany................... 130
238
PLATE ©:
Page
Fig. 478. Oedogonium crassiusculum vy. arechavaletae (Wittr.) Hirn.
GiNedr anil feeciip tunisia een Ree Corse ey wre dG sa eee
Figs. 479 and 480. Oe. wolleanum Wittr. (Redrawn from Hirn)..............135
Fig. 481. Oe. wolleanum v. concinnum Hirn. (Redrawn from Hirn)......... 135
Figs. 482 and 483. Oe. wolleanum f. insigne (Nord.) Hirn. (Redrawn frcm
STEAL isfith) betas). ee an ves WER, (oa) eee 136
nd 485 ium Wittr.
d 487 igerum um Hir ( m Hirn)
90. O um m (Wittr.) ( m
inn) pase.
PLATE: LIi.
©
) POO Oe Ear
) VOC iO Eva CIO
70000 }
Cort
Tier aay 5O MICRONS
Page
Figs. 491 and 492. Oe. cyathigerum v. hormosporum (West) Hirn. (Redrawn
LTO LING Lats) eye atte en a eT e TAN Siy e Me e Ay s Uoloo a eins cise ate 135
Fig. 493. Oe. cyathigerum v. ellipticum M. and W. (Redrawn from Hirn)....134.«
ice 94 Oe siconcatenatiime (racse) MWiibticemerye tae cine. © lett. © > oaks ie cle cic = 136
Hie 4 055 Oc concatenatum b, nutchinsiaen(Witirs)pilinm., 2.25 ons et eee oe 136
241
PLATE LIII.
Tiere Ray
Page
Figs. 496 and 497. . Oedogonium concatenatum v. rectangulare Rich. (After
RES 2, ing a= 8 Son sn oe ae ae ea: eee 137
. Figs. 498 and 499. Oe. elegans West and West. (After West).........------. 138
Fig. 500. Oe. areschougii Wittr. (After Wittrock)............-..--.-+--+--: 140
Fig. 501. Oe. areschougii v. americanum Tiffany...........-...------+------- 140
Figs. 502 and 503. Oe. areschougiif. robustum Hirn. (Redrawn from Hirn). .140
Figs. 504 and 505. Oe. bengalense Hirn. (Redrawn from Ec ere 139
Figs. 506 and 507. Oe. rigidum Hirn. (Redrawn from Hirn)............-..-. 139
242
a.
PLATE LIV.
Page
Fig. 508. Oedogonium brasiliense Borge. (Redrawn from Hirn).............. 140
igs. 5005) Oe indicum) Hin. o(redrawn trom! Him), ..2 42... . ees odo
Bic- 510, ‘Oe: confertum Erm: (Redrawn from! inn). ......0......2 2... 225. 141
Fig. 511. Oc. perspicuum Hirn. (Redrawn from Hirn)...................... 141
Figs. 512 and 513. Oe. clavatum Hallas. (After Hallas)..................... 141
Pip. 314. - Oc. mirandtiam Siuja. (After Skuja).........2......2.:5-.-- ey
Hipessios Oe. danicumetallasse (Aiter Hallas): .... 22... A Ae 145
243
PLATE. LV.
SO MICRONS
Figs. 516 and 517. Oedogonium longicolie Nord.; Hirn. (After Nordstedt)...144
Figs. 518 and 519. Oe. longicolle v. senegalense Nord. (After Nordstedt)....144
Biss 5205 sOewdecipiensawWittr, (Atter Wittrock) = ae a sense eee 145
Figs. 521 and 522. Oe. decipiens f. dissimile Hirn............... tis. Satay Ce 145
Figs. 523 and 524. Oe. decipiens v. africanum Tiffany. (Redrawn from Hirn).145
Fig. 525. Oe. decipiens v. bernardense (Bates) Hirn. (Redrawn from Hirn). .146
Biz, 526. (Oe. rothil (Le/@l) Pringsh: . (After -Pringsheim)eye es eee eee 144
Figs. 527 and 528. Oe. macrospermum West and West...................-...-146
Biz. 529, (Oes uleanum! Eine) \(Redrawnitrom Harn) 2... 22s en ae 170
2 Rie. 5305) Oe. bahusienseyNordst, j(AiitemiNordstedt). .. essence see eee 142
Fig. 531. Oc. bahusiense Nordst., oogonium seen from above................. 142
244
PLATE LVI.
| 50 MICRONS
Tierany
Figs. 532 and 533. Oedogonium crenulatum Wittr. (After Wittrock)......... 171
Fig. 534. Oe. crenulatum v. gracilius (Nord.) Hirn. (Redrawn from Hirn)...171
Pig; doo. Oe. plicatulam Wittr: ~(Redrawinirom Hirn)............:.2c.ouee.- 170
Figs. 536-538. Oe. lagerstedtii Wittr. (Redrawn from Hirn)................. 170
Bite dsoe COE, OFlIauOICUI.W ihuies Elites sons ss cca teeet 142
Fig. 540. Oe. oelandicum f. minus Borge. (Redrawn from Borge)............ 142
Fig. 541. Oe. pulchrum Nord. and Hirn. (Redrawn from Hirn)..............170
Bies42 Oe. boreale Hur. s(kedrawn trom Elirm):...)...-...c.-ee+es0en oO) 147
erate IO oes TEV PATIL AANO Wi le ese oaths = ss, .seie 2c no, ote wares oom oe Boge 142
Hig.044. Oc: platygynim Wittr. “(After Wittrock). .°. 5... .5.00.... 0... t ae, 143
Fig. 545. Oe. platygynum f. obtusum Hirn. (Redrawn from Hirn)............ 143
Fig. 546. Oe. platygynum v. continuum Nordst. (After Nordstedt)...........148
Fig. 547. Oe. platygynum v. novae zelandiae Hirn. (After Nordstedt)........ 144
Een ore CONE ACMIM MISE AUN elles, fos Veale sas eles satan ie 146
(Figs. 533, 537, 541, 544 show also oogonia in optical section seen from above.)
245
PLATE, EV
| 50 MICROWS
Page
Big. 5494) O edovonium macrandrium Wattren.4- eerie eile etre 151
Fig. 550. Oe. macrandrium f. acuminatum Hirn. (Redrawn from Hirn)...... 151
Fig. 551. Oe. macrandrium f. aemulans Hirn. (Redrawn from Hirn)......... 151
Fig. 552. Oe. macrandrium f. lundense (Wittr.) Hirn. (Redrawn from
TeVeaitetay) Wepre bo th Sten clcits Gates one ws 2, oe Sayed baveit. ten
rene
@
es
SO MICRONS
Page
Figs. 618-615. Oedocladium albemarlensis Lewis. (After Lewis)............. 51
Figs. 616-618. O. albemarlensis Lewis. Stages in cell division and
ram lira oemeete ives ooh vss ce <2 ayo a vo eine AE agg gin oars ae a 51
Fig. 619. Oedocladium protonema Stahl. Habit sketch, showing vegetative
and rhizoidal cells, the latter with two resting cells. (Redrawn from Stahl.) 51
Figs. 620 and 621. O. protonema Stahl. Male and female branches.
(Redramwattro mags Fala) vers te oe =. 5 SER cde oe gE ee epee 51
Fig. 622. O. protonema Stahl. Part of filament with three side branches.
(Redraiwantromro ta lili cis coh. 3 cM sie c. ttases eR Mee ae oe ee ere 51
Fig. 623. O. protonema Stahl. Sporeling. (Redrawn from Stahl). (G, cell
ofereen ialament Reanotzo1d all cell) jee. esses cee ees eee
252
PLATE LXIV.
|50 Mic RONS
Figs. 624-630. Different positions of operculum in operculate oogonia of
Oedogonium. 624, supreme; 625, superior; 626, supramedian; 627, median;
628, inframedian; 629, inferior; 630, infimus (basal).
Figs. 631-635. Different positions of pore in poriferous oogonia of Oedogonium.
631, superior; 632, supramedian; 633 and 634, median; 635, inferior.
Fig. 636. Subhemispherical basal cell of Oedogonium.
Fig. 637. Elongated type of basal cell of Oedogonium.
Fig. 638. Formation of oogonium O and suffultory cell S from a division of a
vegetative cell, in Oedogonium.
Figs. 639 and 640. Suffultory cells of Oedogonium.
Figs. 641-645. Formation of oogonium in Bulbochaete. OO, young oogonium;
PO, patent oogonium; EO, erect oogonium; US, upper suffultory cell;
LS, lower suffultory cell; D, dwarf male with antheridium; A, andro-
sporangium.
Figs. 646 and 647. Development of 4 zoospores from germinating oospore.
(After Juranyi.)
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