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BIOLOGY

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PUBLICATIONS
OF

FIELD MUSEUM OF NATURAL
HISTORY

BOTANICAL SERIES
VOLUME 20

CHICAGO, U.S.A.
1939-1943

CONTENTS

PAGES

1. THE MYXOPHYCEAE OP MARYLAND. By Francis Drouet. Febru-

ary 28, 1939 1-14

-A

2. FRANCIS WOLLE'S FILAMENTOUS MYXOPHYCEAE. By Francis Drouet.

December 22, 1939 15-64

3. THE PLANKTONIC FRESHWATER SPECIES OF MICROCYSTIS. By Francis

Drouet. December 22, 1939 65-83

4. TROPICAL MARINE ALGAE OF THE ARTHUR SCHOTT HERBARIUM. By

William Randolph Taylor. November 29, 1941 85-104

5. THE FILAMENTOUS MYXOPHYCEAE OF JAMAICA. By Francis Drouet.

June 15, 1942 105-122

6. STUDIES IN MYXOPHYCEAE. I. By Francis Drouet. June 15, 1942 . . 123-141

7. MYXOPHYCEAE OF EASTERN CALIFORNIA AND WESTERN NEVADA. By

Francis Drouet. November 20, 1943 143-176

in

LIST OF ILLUSTRATIONS

PLATES
NUMBER 4

I. Sargassum Hystrix var. spinulosa (Kiitz.) Grun.

II. Protokuetzingia Schottii

•

NUMBER 6

I. Chroococcus sonorensis, C. Prescottii, Plectonema Cloverianum, Aphanocapsa
Farlounana, Porphyrosiphon Velasquezii, Arthrospira Khannae

II. Phormidium Groesbeckianum, Lyngbya Giuseppei, L. guaymensis, L. Patricki-
ana, Phormidium Steyermarkii, P. californicum, P. thermale

III. Phormidium Standleyi, P. Richardsii, Oscillatoria sonorensis, Phormidium
Gardnerianum, P. hydrocoleoides, Spirulina Weissii

TEXT FIGURES
NUMBER 2

PAGE

1. Schizothrix Wollei Drouet 41

NUMBER 7

1. Schizothrix acutissima 163

2. Schizothrix Macbridei 163

3. Schizothrix californica 163

4. Hydrocoleum Groesbeckianum 163

2JO1

THE MYXOPHYCEAE OF MARYLAND

BY

FRANCIS DROUBT

CURATOR OF CRYPTOGAMIC BOTANY

'

i -•

ii

BOTANICAL SERIES

FIELD MUSEUM OF NATURAL HISTORY

VOLUME 20, NUMBER 1

FEBRUARY 28, 1939

PUBLICATION 439

THE MYXOPHYCEAE OF MARYLAND

BY

FRANCIS DROUET

CURATOR OF CRYPTOGAMIC BOTANY

NATURAL vy
HISTORY >

MAR IB W39

OMB«n OF 1UIWIS

BOTANICAL SERIES

FIELD MUSEUM OF NATURAL HISTORY

VOLUME 20, NUMBER 1

FEBRUARY 28, 1939

PUBLICATION 439

PRINTED IN THE UNITED STATES OF AMERICA
BY FIELD MUSEUM PRESS

THE MYXOPHYCEAE OP MARYLAND

FRANCIS DROUET

The algal flora of the middle and southern Atlantic states is very
inadequately represented in herbaria and in the literature. Taylor
in his Marine Algae of the Northeastern Coast of North America (1937)
has made this fact evident in respect to the marine flora. The fresh-
water algae are known to us chiefly through the accumulated her-
barium of Francis Wolle, whose publications ceased as long ago as
1893. Scattered local floras have been listed, but they are sketchy
and their areas are extremely restricted; few of the specimens (if
extant) which support them have found their ways out of private
hands. The flora of brackish water, the most conspicuous elements
of which are as a rule the Myxophyceae, has been almost totally
neglected, even though the areas of salt marshes and tidewater here
are probably as extensive as anywhere else in North America.

I was therefore greatly pleased to receive the invitation to visit
and collect with Mr. Philip W. Wolle in Somerset County, Maryland,
on the eastern shore of Chesapeake Bay, in August, 1938. Salt
marshes occur along almost the entire shore of this county and on the
islands attached to it. Tidewater rivers extend far inland. During
a week's time, Mr. Wolle and I gathered in collections from every
habitat, fresh, brackish, and semi-marine, that we could discover.
We owe much of the success of this joint collecting to Mr. Roger
White, Mr. Leo A. Bailey, and Dr. Robert H. Johnson, who gave us
transportation to interesting and out-of-the-way places in the region.

Later, I had the pleasure of visiting Dr. Lewis P. McCann at

College Park and of collecting with him and Dr. G. B. Reynard in

1 Prince Georges County. Before leaving the state, I went with Dr.

' Mark W. Woods, Dr. McCann, and Mr. D. S. Stoddard on a tour

; into Garrett County, where opportunity arose to visit localities

; examined for algae in 1878 by Captain John Donnell Smith.

The number of collections of algae from eastern Maryland has
-< been further augmented by Mr. Wolle's recent collecting. Dr.
Harold C. Bold and Dr. F. E. Allison have obligingly given me much
c- of their own blue-green algal material from the state for study.

In the citation of specimens below, serial numbers in italics are

used to indicate my own collections or those made conjointly with

. others mentioned above. All of such collections were taken during

4 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 20

the period August 21-30, 1938. This material is cited as in my own
herbarium, but duplicate specimens have been distributed to the
Field Museum of Natural History, Mr. P. W. Wolle, the Farlow
Herbarium, the Herbarium of Mr. J. C. Strickland, the New York
Botanical Garden, the Naturhistoriska Riksmuseet at Stockholm,
and elsewhere. In general, other specimens are to be found in her-
baria as indicated by the following abbreviations: D, my personal
herbarium; F, Farlow Herbarium of Harvard University; FM, Field
Museum of Natural History; G, Herbarium of Goucher College; N,
New York Botanical Garden; P, Herbarium of the University of
Pennsylvania; U, United States National Herbarium. It is to be
understood that, unless otherwise stated, references to Gomont are
all to his 'Monographic des Oscillarie'es' (1892-93) and those to
Bornet & Flahault are all to their 'Revision des Nostocace"es hetero-
cyst&s' (1886-88).

The Chroococcaceae

CHROOCOCCUS TURGIDUS (Ktitz.) Nag., Gatt. einzell. Alg. 46
(1849). Protococcus turgidus Kiitz., Tab. Phyc. 1: 5 (1845).— In
brackish water, SOMERSET COUNTY: marsh pool at Chance, 2268 (D) ;
marsh pool west of Ewell, Smiths Island, 2306 (D); marsh pool,
Tylerton, Smiths Island, P. W. Wolle (FM, Wolle).

APHANOTHECE STAGNINA (Spreng.) A. Br. in Rabenh., Fl. Eur.
Algar. 2: 66 (1865). Coccochloris stagnina Spreng., Fl. Halens. Mant.
1: 14 (1807). — One specimen, from fresh water, CALVERT COUNTY:
pool, Cove Point, H. C. Bold, 1936 (FM).

GOMPHOSPHAERIA APONINA Kutz., Alg. exs. Dec. 16: 151 (1836).—
In brackish water, SOMERSET COUNTY: marsh pool between Chance
and Dames Quarter, P. W. Wolle, June 12, 1938 (D), 2260 (D).

JOHANNESBAPTISTIA PELLUCIDA (Dickie) Tayl. & Drouet, Bull.
Torr. Bot. Club 65: 285 (1938).— For the lengthy synonymy of this
species, see the above reference. The three collections listed here
extend the known range of this brackish-water species far to the
north of that described previously. CONNECTICUT: with Hydro-
coleum Holdenii, Fresh Pond, Stratford, /. Holden 1035, Sept. 1894
(D, F). MARYLAND: SOMERSET COUNTY: marsh pool west of Ewell,
Smiths Island, 2307 (D) ; with Gomphosphaeria aponina, marsh pool
between Chance and Dames Quarter, P. W. Wolle, July 12, 1938 (D).

The Stigonemataceae

STIGONEMA MINUTUM (Ag.) Hass. ex Born. & Flah. — Two speci-
mens from wet rocks: BALTIMORE COUNTY: Loch Raven, J. E.

THE MYXOPHYCEAE OF MARYLAND 5

Humphrey, Nov. 10, 1894 (G). GARRETT COUNTY: Deep Creek,
J. D. Smith, July 26, 1878 (U).

STIGONEMA INFORME Kiitz. ex Born. & Flah. — Also from wet
rocks, GARRETT COUNTY: Falls of Deep Creek, J. D. Smith, July
26, 1878 (P, U).

STIGONEMA MAMILLOSUM (Lyngb.) Ag. ex Born. & Flah. f. robus-
tum (Gardn.), comb. nov. S. robustum Gardn., Univ. Calif. Publ.
Bot. 14: 9, pi. 4 (1927). — The Maryland material cited here is similar
in habit and structure to the TYPE of S. robustum from China in the
Farlow Herbarium and to material placed under the same name from
Brazil (see Amer. Journ. Bot. 25: 658. 1938) in the Riksmuseet at
Stockholm and from Virginia in my own herbarium. Morphologi-
cally, all of this material is indistinguishable, except for size of fila-
ments, from those specimens cited as typical S. mamillosum by
Bornet & Flahault. I have not had the opportunity to see a sufficient
number of specimens to decide whether or not the two forms can
always be separated with ease on the basis of size differences alone.
One collection, from rocks partially submersed in swift, shallow
water, GARRETT COUNTY: Swallow Falls, 2342 (D, FM).

HAPALOSIPHON PUMILUS (Kiitz.) Kirchn. ex Born. & Flah.
H. fontinalis (Ag.) Born., Bull. Soc. Bot. France 36: 156 (1888).
H. brasiliensis Borge, Ark. f. Bot. 15 (13): 94 (1919). — In fresh water
and wet places. WORCESTER COUNTY: Old Mill Pond, Nassawongo
Creek, Atkinson's District, P. W. Wolle, Nov. 19, 1938 (FM). GAR-
RETT COUNTY: 3 miles north of Oakland, 2336 (D).

The Nostocaceae

NOSTOC PISCINALE Ag. ex Born. & Flah. — In fresh water, BALTI-
MORE COUNTY: Loch Raven, C. E. Waters, July 29, 1897 (F).

NOSTOC MUSCORUM Ag. ex Born. & Flah. — A very common soil
alga throughout the northeastern and north central states, often most
abundantly developed in dried rain pools. SOMERSET COUNTY:
Wolle Farm, 3 miles northwest of Princess Anne, 2296 (D). PRINCE
GEORGES COUNTY: on bank of Paint Branch at Riggs Road west
of Beltsville, 2321 (D). GARRETT COUNTY: springy places in pasture
3 miles north of Oakland, 2341 (D).

NOSTOC COMMUNE Vauch. ex Born. & Flah. — BALTIMORE COUNTY:
on earth, Loch Raven, J. E. Humphrey, Apr. 29, 1897 (G), C. E.
Waters, July 24, 1897 (Phyc. Bor.-Amer. 403a, D, FM); Towson,
Humphrey, Nov. 10, 1889, 1894 (G).

6 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 20

ANABAENA SPHAERICA Born. & Flah.— SOMERSET COUNTY: in a
brackish ditch between Wenona and Deal Island, 2265 (D).

ANABAENA VARIABILIS Kiitz. ex Born. & Flah. — In fresh water,
WICOMICO COUNTY: on wet sand, Sandy Hill Beach, Tyaskin,
2252 (D).

NODULARIA HARVEYANA Thur. ex Born. & Flah. — SOMERSET
COUNTY: floating in a brackish pond, Rhodes Point, Smiths Island,
2302 (D).

CYLINDROSPERMUM MAJUS Kiitz. ex Born. & Flah. C. janihinum
Dickie ex Born. & Flah., sp. inquir. — On moist soil. BALTIMORE
COUNTY: rocks, J. D. Smith, May 13, 1878 (P, U). MONTGOMERY
COUNTY: banks near Glen Echo, F. E. Allison 37, 38, July 10, 1937
(D,F,N).

CYLINDROSPERMUM MUSCICOLA Kiitz. ex Born. & Flah. C. caeru-
leum Dickie ex Born. & Flah., sp. inquir. — MONTGOMERY COUNTY:
in shallow water, Dalecarlia Reservoir, Conduit Road near District
of Columbia, F. E. Allison 42, July 10, 1937 (D).

CYLINDROSPERMUM LICHENIFORME (Bory) Kiitz. ex Born. & Flah.
—MONTGOMERY COUNTY: on soil near Dalecarlia Reservoir, F. E.
Allison 40, 41, July 10, 1937 (D, N).

The Rivulariaceae

CALOTHRIX PULVINATA (Mert.) Ag. ex Born. & Flah. — In marine
and brackish waters. WICOMICO COUNTY: on pilings in Nanticoke
River, Sandy Hill Beach, Tyaskin, 2253 (D). SOMERSET COUNTY:
with Fremyella grisea, on piling of old wharf at Shelltown, P. W.
Wolle, Nov. 21, 1938 (FM).

RIVULARIA NITIDA Ag. ex Born. & Flah. — In wet brackish places.
SOMERSET COUNTY: on cedar stumps at head of Pocomoke Sound,
below Shelltown, P. W. Wolle, Nov. 21, 1938 (FM).

GLOEOTRICHIA NATANS (Hedw.) Rabenh. ex Born. & Flah.
Rivularia natans (Hedw.) Welw. ex Born. & Flah., pro synon. Rivu-
laria, (Gloeotrichia) flagelliformis Gardn.,1 Mem. New York Bot.
Gard. 7: 71 (1927).— In fresh water, CALVERT COUNTY: Pt. Patience,
H.C.BoW,1937(FM).

The Scytonemataceae

FREMYELLA GRISEA (Born. & Flah.) J. DeToni, Noter. Nomencl.
Algol. VIII (1936). Microchaete grisea Thur. ex Born. & Flah. — In

1 The TYPE of R. flagelliformis in the New York Botanical Garden and an iso-
type in the U. S. National Herbarium (PUERTO RlCO: in a water reservoir near
Rio Piedras, N. Wille 126, Dec. 28, 1914) consist of typical plants of Gloeotrichia
natans with principally young spores and very few almost mature ones.

THE MYXOPHYCEAE OF MARYLAND 7

brackish and marine waters. SOMERSET COUNTY: on piling of old
wharf at Shelltown, P. W. Wolle, Nov. 21, 1938 (FM).

TOLYPOTHRIX TENUIS Kiitz. ex Born. & Flah. T. rupestris Wolle,
F. W. Alg. U. S. 1: 265 (1887); Geitler, Rabenh. Kryptogamen-Fl.
14: 733 (1932). — In fresh water, BALTIMORE: on grasses in pools in
abandoned brickyard, J. E. Humphrey, Oct. 10, 1896 (Phyc. Bor.-
Amer.257,FM).

SCYTONEMA TOLYPOTRICHOIDES Kiitz. ex Born. & Flah. S. gracile
var. tolypotrichoides Wittr. ex Born. & Flah., sp. inquir. — In fresh
water, GARRETT COUNTY: Falls of Deep Creek, J. D. Smith, July 26,
1878 (P).

SCYTONEMA HOFMANNII Ag. ex Born. & Flah. — Subaerial in moist
places, BALTIMORE COUNTY: on wet moss, Loch Raven, J. E. Hum-
phrey, Nov. 10, 1894 (G).

SCYTONEMA OCELLATUM Lyngb. ex Born. & Flah. — Usually found
on rocks and soil wet occasionally by rains. PRINCE GEORGES
COUNTY: bank of Paint Branch at Riggs Road west of Beltsville,
2322 (D).

SCYTONEMA GUYANENSE (Mont.) Born. & Flah. S. guyanense var.
minus Gardn.,1 Mem. New York Bot. Gard. 7: 79 (1927).— On rocks
and trees, most abundant in the warmer regions of the Western
Hemisphere. BALTIMORE COUNTY: on wet rocks near L. Roland,
J. E. Humphrey, Apr. 20, 1895 (G).

The Oscillatoriaceae

SCHIZOTHRIX PURPURASCENS (Kiitz.) Gom. Hydrocoleum rufescens
Gardn.,2 Mem. New York Bot. Gard. 7: 57 (1927).— A common
inhabitant of soil wet only by rains in the eastern United States.
GARRETT COUNTY: in an old field 3 miles north of Oakland, 2338 (D).

SCHIZOTHRIX MUELLERI Nag. ex Gom. Hydrocoleum Hieronymii
Richt.3 in Hauck & Richt., Phyk. univ. 543 (1892).— On moist soil

1 The TYPE of this variety in the New York Botanical Garden, PUERTO
Rico: on rocks along the roadside, Arecibo to Utuado, N. Wille 11+55, Mar. 4, 1915,
said to have filaments more tenuous than those in the typical variety, appears to
differ in no respect from material of S. guyanense cited by Bornet & Flahault.

2 The TYPE of Hydrocoleum rufescens in the New York Botanical Garden,
PUERTO Rico: on red soil at the Experiment Station, Mayaguez, N. Wille 972,
Feb. 6-8, 1915, is excellent material of Schizothrix purpurascens.

3 1 can find nothing to distinguish the isotypic material of Hydrocoleum Hier-
onymii in the Farlow Herbarium, GERMANY: in Carlowitz bei Breslau, G.
Hieronymus, Sept.-Okt. 1891 (Phyk. univ. 543), from specimens of Schizothrix
Muelleri cited by Gomont. Geitler has made a similar suggestion in Rabenh.
Kryptogamen-Fl. 14: 1157 (1932).

8 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 20

and rocks, GARRETT COUNTY: with S. Friesii, Falls of Deep Creek,
J. D. Smith, July 26, 1878 (U).

HYDROCOLEUM HOLDENII Tild., Rhodora 3: 254 (1901); Drouet,
idem 40: 229 (1938). H. majus Holden, idem 1: 197 (1899), not
Mart. — These Maryland records extend the known distribution far
to the south of southern New England, whence previously recognized
material has come. As in the northern part of its range, H. Holdenii
is here an inhabitant of brackish pools. WORCESTER COUNTY: in a
salt marsh 1 mile south of Public Landing, Assateague Bay, P. W.
Wolle, Nov. 19, 1938 (FM). SOMERSET COUNTY: marsh ditch at
Tylerton, Smiths Island, P. W. Wolle, Aug. 12, 1938 (FM, Wolle).

MICROCOLEUS CHTHONOPLASTES (Fl. dan.) Thur. ex Gom.—
Often the commonest and most conspicuous alga on shores and about
brackish pools. SOMERSET COUNTY: on mud flat between Ewell and
Rhodes Point, Smiths Island, 2303 (D); brackish ditch between
Wenona and Deal Island, 2266 (D) ; wet sand along Upper Thorough-
fare, Deal Island, 2268 (D); on wet soil at White Haven Ferry, Mt.
Vernon,2251 (D).

MICROCOLEUS TENERRIMUS Gom. — In marine and brackish
waters, SOMERSET COUNTY: on pilings, Wenona, 2284 (D).

MICROCOLEUS VAGINATUS (Vauch.) Gom. — As abundantly repre-
sented as Nostoc Muscorum on open soil wet occasionally by rains in
eastern North America. PRINCE GEORGES COUNTY: with Scytonema
ocellatum, bank of Paint Branch at Riggs Road west of Beltsville,
2322 (D).

PLECTONEMA GOLENKINIANUM Gom., Bull. Soc. Bot. France 46:
35 (1899); Collins, Holden & Setchell, Phyc. Bor.-Amer. 13: 603
(1899). Lyngbya (Leibleinia) subtilis Holden1 in Collins, Holden &
Setchell, Phyc. Bor.-Amer. 24: 1163 (1904), not West. Lyngbya
Holdenii Forti,1 Syll. Myxophyc. 260 (1907). — In marine and brack-
ish water. SOMERSET COUNTY: with -Fremyella grisea, on piling of old
wharf at Shelltown, P. W. Wolle, Nov. 21, 1938 (FM).

1 The case of Lyngbya subtilis Holden is a somewhat peculiar one. The original
description was published in company with specimens of a true Lyngbya (see
below) from Massachusetts which are quite different in nature from the TYPE
in the Farlow Herbarium from CONNECTICUT: Bridgeport, /. Holden, Jan. 10,
1891. The form represented in the type specimen is similar to that of the co-type
of Plectonema Golenkinianum Gom. distributed in Phyc. Bor.-Amer. 603. The
two collections, one from Maine and the other from Massachusetts, distributed in
Phyc. Bor.-Amer. 1007 under the manuscript name Lyngbya subtilis Holden,
consist of this same species of Plectonema. The name L. Holdenii was proposed by
Forti to replace the name preoccupied by L. subtilis West, Journ. Roy. Microsc.
Soc. 1892: 741 (1892). The true Lyngbya represented in Phyc. Bor.-Amer. 1163
has already been described by Collins as Schizothrix Simmonsiae, in Phyc. Bor.-
Amer. 707. The isotypic specimens accompanying the description of S. Sim-

THE MYXOPHYCEAE OF MARYLAND 9

SYMPLOCA MUSCORUM (Ag.) Com. Phormidium Corium var.
capitatum Gardn.,1 Univ. Calif. Publ. Bot. 14: 4 (1927). P. interrup-
tum var. capitatum Gardn.,1 Mem. New York Bot. Gard. 7: 44
(1927). — Also a soil form, often developing in places which are moist
for a considerable part of the year. SOMERSET COUNTY : in an artesian
spring, Kings Creek, 2292 (D). HARFORD COUNTY: Spesutie Island,
J. D. Smith, Oct. 1878 (P). PRINCE GEORGES COUNTY: swamp 1
mile west of Beltsville, 2315, 2318 (D); soil under pear trees, Belts-
ville, F. E. Allison 16, June 14, 1937 (D). GARRETT COUNTY: Falls of
Deep Creek, J. D. Smith, Oct. 1878 (U) ; on soil in an old field 3 miles
north of Oakland, 2339 (D).

LYNGBYA AESTUARII (Mert.) Liebm. ex Gom. — Submersed and
subaerial in brackish and marine waters. WORCESTER COUNTY: in a
salt marsh at Public Landing, Assateague Bay, P. W. Wolle, Nov. 19,
1938 (FM). SOMERSET COUNTY: on mud in street, Ewell, Smiths
Island, 2300 (D); brackish ditch, Ewell, 2308 (D).

LYNGBYA CONFERVOIDES Ag. ex Gom. — On rocks and wood in
marine waters. WORCESTER COUNTY: pilings of old wharf at Public
Landing, Assateague Bay, P. W. Wolle, Nov. 19, 1938 (FM). SOMER-
SET COUNTY: jetty, Upper Thoroughfare, Deal Island, 226 ^ (D); on
rocks, Wenona, 2282 (D).

LYNGBYA SEMIPLENA (Ag.) Ag. f. ex Gom. — On rocks etc. in
marine and brackish waters. CALVERT COUNTY: in Chesapeake Bay,
H. C. Bold, July 5, 1937 (FM).

monsiae have all the characteristics of a species of Lyngbya in the hormogonial
state and closely related to L. gracilis (Menegh.) Rabenh. ex Gom. For disposal of
these specimens, I propose the following:

LYNGBYA Simmonsiae (Collins), comb. nov. Schizothrix Simmonsiae Collins
in Collins, Holden & Setchell, Phyc. Bor.-Amer. 15: 707 (1900). Fila epiphytica,
recta aut flexuosa, aggregata, flexilia, rosea vel aeruginea; vaginis tenuibus usque
paullo incrassatis, hyalinis, passim lamellosis, parce mucosis, chlorozincico iodurato
laete caerulescentibus; trichomatibus pallide aerugineis usque roseis, ad genicula
evidenter constrictis, saepe torulosis, 3ju ad 5/u crassis, haud attenuatis; articulis
subquadratis usque diametro sextuple brevioribus, 0.5ju ad 3.5^ longis; proto-
plasmate homogeneo, passim tenui-granuloso; cellula apicali rotundata, calyptra
nulla (v. s.). — Epiphytic on larger algae in quiet marine waters of southern New
England: MASSACHUSETTS: on Enteromorpha, Magnolia, W. G. Farlow, Sept. 1903
(co-type of Lyngbya subtilis Kolden in Phyc. Bor.-Amer. 1163, D, F, FM, N);
water sample from Vineyard Sound, L. C. Lillick, Summer 1938 (FM). RHODE
ISLAND: on algae in high rock pool, Easton's Point, Newport, Mrs. W. C. Sim-
mons, Dec. 1897 (TYPE in Herb. New York Bot. Gard.; isotypes in Phyc. Bor.-
Amer. 707, D, F, FM, N).

1 The specimens (among them the TYPE from CHINA: Kuliang near Foochow,
Fukien Province, H. H. Chung A402) in the Farlow Herbarium which Gardner
cited with the original description of Phormidium Corium var. capitatum are
excellent and typical material of the inundated form of Symploca Muscorum. The
TYPE of Phormidium interruptum var. capitatum (PUERTO RlCO: side of road near
Humacao, N. Wille 5^0, Jan. 20-24, 1915) in the New York Botanical Garden
is to be interpreted in a similar fashion.

10 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 20

LYNGBYA LUTEA (Ag.) Gom. Oscillatoria sordida Dickie ex Forti,
Syll. Myxophyc. 192 (1907). — On rocks etc. in salt and brackish
water, also on wet soil on shores. DORCHESTER COUNTY: on banks
of Nanticoke River opposite Sandy Hill Beach (Tyaskin), 2258 (D).

LYNGBYA OCHRACEA (Kiitz.) Thur. ex Gom. — In shallow pools in
springy ground. PRINCE GEORGES COUNTY: below dam of pond,
Riggs Road at Paint Branch west of Beltsville, 2325 (D).

PHORMIDIUM Weissii, sp. nov. Stratum aerugineum aut nigres-
cens, mucosum vel membranaceum; trichomatibus rectis undulatisve,
fragilibus, paralleliter in muco amorpho hyalino chlorozincico iodur-
ato haud caerulescente dispositis, ad genicula evidenter constrictis,

FIG. 1. Phormidium Weissii, sp. nov., drawn from the TYPE specimen by
Mrs. Inez Austin.

numquam torulosis, 1.0/i ad 2.5/z crassis, superne rectis vel curvatis
uncinatisve, ad apices sensim et longe attenuatis et acutis; articulis
subquadratis aut diametro usque duplo longioribus, 1.5/x ad 5/x longis;
protoplasmate per totam cellulam homogeneo, raro tenui-granuloso;
dissepimentis conspicuis, haud granulatis; cellula apicali acute conica,
haud capitata, sine calyptra (v. v., v. s., v. in form.). Fig. 1. In
brackish and marine waters of low salinity along the eastern shore of
North America, MASSACHUSETTS: in high pools on rocks, Black
Rock, off Sconticut Point, Fairhaven, C. M. Palmer & Drouet 2177,
Sept. 1, 1937 [TYPE in Herb. F. Drouet; Isotypes: British Museum
(Natural History), F, FM, N, Naturhistoriska Riksmuseet (Stock-
holm), Herb. J. C. Strickland]; on rocks in high tide pools, Penikese
Island, Gosnold, J. Cohn, July 10, 1934 (D) ; Botanical Survey of
Penikese Island (Herb. Marine Biol. Lab.). MARYLAND: SOMER-
SET COUNTY: in a brackish pool, Wenona, 2279 (D); on Ruppia in a
marsh pool between Ewell and Rhodes Point, Smiths Island, 2305
(D) ; road puddle at old wharf, Shelltown, P. W. Wolle, Nov. 21, 1938
(FM). FLORIDA: southwest Florida, J. D. Smith, Mar. 1878 (D, P, U).
BAHAMA ISLANDS: in the lagoon, Watling Island, M. A. Howe 5095,
Nov. 25, 1907 (D).

THE MYXOPHYCEAE OF MARYLAND 11

This well characterized species of brackish water has passed in
herbaria and literature under several names: P. Boryanum in herb.
Wolle; P. tenue according to Hazen in Lewis, Rhodora 26: 211 (1924) ;
P. valderianum in Collins' list of algae in Britton & Millspaugh, The
Bahama Flora, p. 621 (1920) ; and P. fragile in my recent treatment of
the southern Massachusetts Oscillatoriaceae in Rhodora 40: 260
(1938). In my own herbarium, material has heretofore been filed
tentatively with P. fragile (Menegh.) Gom. and P. subuliforme Gom.;
specimens of Nos. 2279 and 2305 from Maryland have been dis-
tributed to other herbaria under these names. Morphologically
P. Weissii is closely related to these two species. It gives me much
pleasure here to name this new form in honor of Mr. Philip Weiss
Wolle, to whose ardent enthusiasm for microscopy and collecting I
am chiefly indebted for the opportunity to study the Myxophyceae
of the state of Maryland.

PHORMIDIUM INUNDATUM Kiitz. ex. Gom. P. purpurascens var.
elegans Drouet, Bot. Gaz. 95: 696 (1934). — One specimen from fresh
water: BALTIMORE COUNTY: J. D. Smith, May 1878 (U).

PHORMIDIUM RETZII (Ag.) Gom. P. leptodermum var. capitatum
Gardn.,1 Mem. New York Bot. Gard. 7: 43 (1927).— In running fresh
water. BALTIMORE COUNTY: on dripping rocks, Loch Raven, J. E.
Humphrey, Apr. 4, 1895 (G). PRINCE GEORGES COUNTY: on stones
in stream near Paint Branch at Riggs Road west of Beltsville,
2324 (D).

PHORMIDIUM FAVOSUM (Bory) Gom. — In running fresh water,
etc. BALTIMORE COUNTY: near L. Roland, J. E. Humphrey, Mar. 23,
1895 (G) ; foul drain ditch, J. D. Smith, May 23, 1878 (P, U).

PHORMIDIUM SUBFUSCUM var. JOANNIANUM (Kiitz.) Gom. — In
running fresh water. BALTIMORE COUNTY: mill dam, J. D. Smith,
May 1878 (P, U).

PHORMIDIUM UNCINATUM (Ag.) Gom. — In fresh water. BALTI-
MORE COUNTY: foul drain ditch, J. D. Smith, May 23, 1878 (P).

PHORMIDIUM AUTUMNALE (Ag.) Gom. Lyngbya hahatonkensis
Drouet, Bot. Gaz. 95: 696 (1934). — On wet soil etc., seldom found
submerged in fresh water. CALVERT COUNTY: watering trough,
Solomons, H. C. Bold, July 2, 1936 (FM). CARROLL COUNTY: on soil
in a farmyard at Sauble's Inn, Taneytown, F. E. Allison 30, July 5,
1937 (D).

1 The TYPE of P. leptodermum var. capitatum in the New York Botanical
Garden, PUERTO Rico: on rocks in a stream of warm water, Coamo Springs,
N. Wille 361*, Jan. 12, 1915, is excellent material of P. Retzii.

12 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 20

OSCILLATORIA PRINCEPS Vauch. ex Gom. 0. obtusa Gardn.,1 Mem.
New York Bot. Gard. 7: 38 (1927). Lyngbya gigantea Lewis, Zirkle &
Patrick, Journ. Elisha Mitchell Sci. Soc. 1933: 221 (1933).— In quiet
fresh water, SOMERSET COUNTY: in seepage water, Kings Creek, 2290
(D) ; with 0. proboscidea. 'Red Bridge/ headwaters of the Manokin
River, Princess Anne, P. W. Wolle, July 6, 1938 (D).

OSCILLATORIA PROBOSCIDEA Gom. 0. refringens Gardn.,2 Mem.
New York Bot. Gard. 7: 38 (1927). — In similar situations as, and
often in company with, the preceding. SOMERSET COUNTY: 'Red
Bridge,' headwaters of the Manokin River, Princess Anne, P. W.
Wolle, July 6, 1938 (D). BALTIMORE: Biology Laboratory, Johns
Hopkins University, J. E. Humphrey, Mar. 9, 1895 (G).

OSCILLATORIA LIMOSA Ag. ex Gom. — In fresh water. GARRETT
COUNTY: J. D. Smith, Aug. 4, 1878 (U).

OSCILLATORIA CURVICEPS Ag. ex Gom. — In fresh water. BALTI-
MORE COUNTY: in stream, Loch Raven, J. E. Humphrey, Nov. 10,
1894 (G).

OSCILLATORIA ORNATA Kiitz. ex Gom. — In fresh water. CALVERT
COUNTY: with Spirulina major, Cove Point, H. C. Bold, July 6, 1937
(FM).

OSCILLATORIA MARGARITIFERA Kiitz. ex Gom. — In brackish and
semi-marine waters, SOMERSET COUNTY: marsh ditch at Wenoha,
P. W. Wolle, June 12, 1938 (D); marsh pool at Chance, 2269 (D);
with Hydrocoleum Holdenii, marsh ditch at Tylerton, Smiths Island,
P. W. Wolle, Aug. 12, 1938 (FM, Wolle).

OSCILLATORIA NIGRO-VIRIDIS Thw. ex Gom. — In marine and semi-
marine waters. SOMERSET COUNTY: on pilings, Wenona, 2283 (D).

OSCILLATORIA TENUIS Ag. ex Gom. 0. tennis var. levis Gardn.,3
Mem. New York Bot. Gard. 7: 38 (1927).— In quiet fresh water.
SOMERSET COUNTY: Manokin River marsh, 2 miles west of Princess
Anne, P. W. Wolle, Oct. 9, 1938 (FM). BALTIMORE COUNTY: foul
drain ditch, J. D. Smith, Mar. 23, 1878 (P, U). ANNE ARUNDEL

1 The TYPE of O. obtusa in the New York Botanical Garden, PUERTO Rico: in
a pool, Parque Borinquen, Santurce, _A7. Wille 807, Feb. 3, 1915, is indistinguish-
able to me from other specimens which I have placed in O. princeps.

* The TYPE of O. refringens, PUERTO Rico: among water plants in the Turabo
River, Caguas, N. Wille 486b, Jan. 15-17, 1915, in the New York Botanical Garden
is typical material of O. proboscidea.

3 The TYPE of O. tennis var. levis in the New York Botanical Garden, PUERTO
Rico: among other algae in the Turabo River, Caguas, N. Wille 486a, Jan. 17,
1915, appears to represent the larger form of O. tennis designated as var. natans
(Kiitz.) Gom.

THE MYXOPHYCEAE OF MARYLAND 13

COUNTY: Smith, May 18, 1878 (P). GARRETT COUNTY: Smith, July
1878 (U).

OSCILLATORIA AMPHIBIA Ag. ex Gom. — In brackish and almost
fresh water. SOMERSET COUNTY: marsh pool between Chance and
Dames Quarter, 2161 A (D).

OSCILLATORIA SALINARUM Collins in Collins, Holden & Setchell,
Phyc. Bor.-Amer. 24: 1160 (1904). 0. luteola Drouet, Rhodora 39:
277, f. 1 (1937).— When I described 0. luteola in 1937, it had puzzled
me that I had not found an earlier name for this very often encoun-
tered species of brackish water from the coasts of both Americas.
The possibility of applying the name 0. salinarum Collins had
suggested itself, but at that time I had access only to the badly pre-
served and uninformative isotypic specimens distributed to several
eastern herbaria in Phyc. Bor.-Amer. 1160. Recently I examined
with great care the copious material of the TYPE in the New York
Botanical Garden. Most of it is quite as dubious as that in the
Phycotheca specimens, but certain portions are sufficiently well
preserved to show that the species designated by Collins is the same
as 0. luteola. Collins' description is so sketchy that it might easily
apply to several of Gomont's species. For a fuller characterization
of 0. salinarum, the reader is referred to the original description of
0. luteola. SOMERSET COUNTY: brackish ditch, Ewell, Smiths Island,
2309 (D); with 0. margaritifera, marsh ditch near Wenona, P. W.
Wolle, June 12, 1938 (D); with Hydrocoleum Holdenii, Tylerton,
Wolle, Aug. 12, 1938 (Fi, Wolle).

OSCILLATORIA FORMOSA Bory ex Gom. — In fresh water. SOMER-
SET COUNTY: roadside puddle, Church Street, Princess Anne, P. W.
Wolle, Aug. 25, 1938 (FM, Wolle).

OSCILLATORIA BREVIS Kiitz. ex Gom. — On moist soil and in rain-
water pools. SOMERSET COUNTY: on mud, Wenona, 2277 (D).

OSCILLATORIA BREVIS var. NEAPOLITANA (Kiitz.) Gom. — In
brackish and semi-marine waters. SOMERSET COUNTY: on pilings,
Wenona, 2287 (D); with Phormidium Weissii, puddle at old wharf,
Shelltown, P. W. Wolle, Nov. 21, 1938 (FM).

SPIRULINA MAJOR Kiitz. ex Gom. S. densa Lillick, Amer. Midi.
Nat. 16:210(1935) .—SOMERSET COUNTY : brackish pool, Wenona, 2288
(D). CALVERT COUNTY: Cove Point, H. C. Bold, July 6, 1937 (FM).

SPIRULINA TENERRIMA Kiitz. ex Gom. S. socialis Gardn.,1 New
York Acad. Sci., Sci. Surv. Porto Rico 8: 272 (1932).— In brackish

1 There appears to be no reason to separate the TYPE of S. socialis in the New
York Botanical Garden, PUERTO Rico: Santurce, M. A. Howe 2162a, May 27,
1903, from other specimens of S. tenerrima.

14 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 20

and marine waters. SOMERSET COUNTY: marsh pool between Ewell
and Rhodes Point, Smiths Island, 2304- (D).

SPIRULINA SUBSALSA Oerst. ex Gom. Arthrospira subsalsa Crow
apud Croasdale, F. W. Alg. Woods Hole, Mass. 18 (1935).— In
marine and brackish waters. SOMERSET COUNTY: with Oscillatoria
amphibia, in a marsh pool between Chance and Dames Quarter,
2161 A (D).

To Be Excluded

Microcystis Donnellii Wolle, Bull. Torr. Bot. Club 6: 282 (1879),
is represented in the original collection by a ciliate protozoan with
endophytic green cells: GARRETT COUNTY: J. D. Smith, July 1878
(TYPE in Herb. Univ. Pennsylvania; Isotype, U).

LIBRAE OF THE

MAR 15 1939

UNIVERSITY OF ILLINOIS

INDEX

Synonyms in italics

Acanthophora muscoides, 99

spicifera, 99

Acetabularia crenulata, 90
Agardhiella tenera, 96
Amphithrix janthina, 28, 157

villosa, 57
Anabaena catenula, 27, 57, 156

circinalis, 27, 81

cupressaphila, 33, 113

flos-aquae, 57

flps-aquae var. aestuarii, 55

gigantea, 57

inaequalis, 156

oscillarioides, 27, 57, 157

scabra, 27

sphaerica, 6

stagnalis, 57

torulosa, 57

variabilis, 6, 57, 156
Anacystis amplivesciculata, 80

anomala, 80

brunnea, 82

compacta, 80

consociata, 80

cylindrica, 80

distans, 80

elabens, 80

gigas, 80

glauca, 72, 125

gloeocapsoides, 80

Grevillei, 82, 147

irregularis, 80

magnified, 80

marginata, 80, 150

microsphaeria, 80

minutissima, 80

nidulans, 80

nigropurpurea, 80

nigroviolacea, 80

paludosa, 81

parasitica, 81

Peniocystis, 151

pulchra, 81

pulverea, 72

radiata, 81

radiata var. major, 81

Reinboldii, 81

rupestris, 150

TFi««i, 81
Aphanocapsa biformis, 151

Castagnei, 150

Farlowiana, 125

Grevillei, 147
Aphanothece Castagnei, 150

conferta, 150

conferta var. brevis, 151

elabens, 80, 81, 82

gelatinosa, 151

Naegelii, 150

Packardii, 82

stagnina, 4
Arthrospira Jenneri, 59

Khannae, 141

SM&safea, 14, 54, 176
Aulosira implexa, 160

Beggiatoa hinnulea, 54
Bryopsidaceae, 90
Bryopsis plumosa, 90
Bryothamnion Seaforthii, 99
triquetrum, 99

Cagniardia Castagnei, 150
Calothrix adscendens, 30, 158

aeruginea, 110

Braunii, 29, 57, 158

Brebissonii, 57

Castellii, 57

Contarenii, 110

Crustacea, 110

Dillwynii, 57

Donnellii, 57

Fortii, 30, 158

gracilis, 55

gypsophila, 57

Hosfordii, 30

Juliana, 29, 109

lacuola, 55

longifila, 130

Meneghiniana, 57

mirabilis, 57

Orsiniana, 57

parietaria, 29, 158

pilosa, 110

pulvinata, 6, 29

scytonemicola var. brasiliensis, 32, 110,
160

thermalis, 159

violacea, 30, 158
Caulerpa Ashmeadii, 90

crassifolia var. mexicana, 90

cupressoides, 91

cupressoides var. mamillpsa, 91

cupressoides var. Turneri, 91

paspaloides var. Wurdemannii, 91

prolifera, 91

racemosa, 91

sertularioides f. brevipes, 91

sertularioides f. longipes, 91

taxifolia, 91
Caulerpaceae, 90
Centroceras clavulatum, 98

177

178 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOLUME 20

Ceramiaceae, 98
Ceramium fastigiatum, 98

nitens, 98

strictum, 98
Chaetangiaceae, 95
Chaetomorpha media, 90
Chamaedoris Peniculum, 90
Chamaesiphon polonicus, 153
Chamaesiphonaceae, 152
Champiaceae, 98
Chlorophyceae, 89
Chondria atropurpurea, 100
Chroococcaceae, 4, 147
Chroococcus cohaerens, 149

decolorans, 149

granulosus, 148

helvelicus, 148

minutus var. virescens, 148

Fresco ttii, 127

rufescens, 148

Simmeri, 148

sonorensis, 127

thermophilus, 149

turgidus, 4, 149

turgidus var. rufescens, 149

varius, 149

virescens, 148
Chroothece cryptarum, 128
Chylocladia ovalis, 98
Cladophora fascicularis, 90
Cladophoraceae, 90
Cladophoropsis membranacea, 90
Clathrocystis aeruginosa, 74

elongata, 82

holsatica, 73

reticulata, 82

robusta, 75

roseo-perszcina, 81
Coccochloris Grevillei, 147

stagnina, 4
Codiaceae, 91
Codium isthmocladum, 91
Coelosphaerium genuense, 152

Kuetzingianum, 151

Naegelianum, 152

Wichurae, 152
Corallina cubensis, 95

subulata, 95
Corallinaceae, 95
Cryptonemia crenulata, 95

luxurians, 95

Cylindrospermum caeruleum, 6, 28, 109,
157

comatum, 57

janthinum, 6, 28, 157

licheniforme, 6, 28, 157

limicola, 57

macrospermum, 57

majus, 5, 28, 57, 157

muscicola, 6, 28, 109, 157

riparium, 57

Dasya pedicellata, 99

Dasyaceae, 99

Dasycladaceae, 90

Dermocarpa Gardneriana, 128, 153

Hpllenbergii, 152

minuta, 130

Setchellii, 129, 153

Solheimii, 129
Desmonema Wrangelii, 58
Dichothrix Baueriana, 30

Bornetiana, 110

calcarea, 159

fucicola, 110

Epsophila, 57, 159
>sfordii, 30

inyoensis, 159

Orsiniana, 31, 159

penicillata, 110
Dictyopteris delicatula, 92
Dictyota cervicornis, 92

ciliolata, 92

divaricata, 92
Dictyotaceae, 92
Digenia simplex, 100
Diplocolon Heppii, 34
Dipterosiphonia dendritica, 100

Ectocarpaceae, 92
Ectocarpus breviarticulatus, 92
Enteromorpha lingulata, 89
Entophysalis cryptarum, 128

magnoliae, 148
Eucheuma acanthocladum, 96

isiforme, 96

Fischera thermalis, 56

Fischerella ambigua, 24, 56, 108, 153

major, 25

thermalis, 24
Fremyella diplosiphon, 32, 160

grisea, 6

longifila, 130

striatula, 130

tenera var. tenuior, 160
Fucaceae, 93

Galaxaura marginata, 95

oblongata, 95

rugosa, 95
Gelidiaceae, 95
Gelidium pusillum, 95
Gloeocapsa calcarea, 148

gigas, 80

Itzigsohnii, 148

lignicola, 147

magma, 148

magma var. Itzigsohnii, 148

multisphaerica, 148

nigrescens, 147

Peniocystis, 151

purpurea, 151

stegophila, 148

INDEX

179

tepidariorum, 150

violacea, 147

Gloeocystis Parpliniana, 81
Gloeothece decipiens, 151

distans, 150

rupestris, 151

rupestris var. tepidariorum, 151

tepidariorum, 150
Gloeotrichia echinulata, 31

natans, 6, 32, 57, 110, 160

Pisum, 32, 57
Gomphpsphaeria appnina, 4, 152

aponina var. cordiformis, 152
Gracilaria armata, 97

cervicornis, 97

compressa, 97

confervoides, 97

confervoides var. longissima, 97

cornea, 97

damaecornis, 97

domingensis, 97

ferox, 98

foliifera, 98

mamillaris, 98
Graciliariaceae, 97
Grateloupia cuneifolia, 96
Grateloupiaceae, 95

Halimeda tridens, 91

Tuna, 92

Tuna var. minor, 92

Tuna var. platydisca, 92
Halymenia Floresia, 95
Hapalosiphon brasiliensis, 5, 25, 108, 154

Brebissonii, 56

fontinalis, 5, 25, 108, 154

fontinalis var. tenuissimus, 56

laminosus, 154

major, 154

pumilus, 5, 25, 108, 154

tenuissimus, 56

torulpsus, 56

Hassallia byssoidea, 33, 113
Herposiphonia tenella, 100
Homoethrix Juliana, 109
Hormothamnion enteromorphoides, 109
Hydrocoleum comoides, 116

confluens, 134

floccosum, 116

glutinosum, 44, 116

Groesbeckianum, 166

helveticum, 58

Hieronymii, 7, 42, 115

Holdenii, 8

homoeotrichum, 58

lyngbyaceum, 58, 116

majus, 8

Ravenelii, 39

rufescens, 1, 40
Hydroepicoccum genuense, 152
Hypheothrix aikenensis, 43

arenaria, 43

bullpsa, 56

calcicola, 44, 165

coriacea, 166

hinnulea, 54

lardacea, 43, 166

luminosa, 58

tenax, 48, 171

tinctoria, 58
Hypnea cervicornis, 96

musciformis, 96

spinella, 96
Hypneaceae, 96

Inactis Austinii, 54

ecalcarea, 157

lacustris, 44, 115, 166

obscura, 29, 158

vaginata, 44
Isactis caespitosa, 57

caespitosa var. tenuior-viridis, 56

fluviatilis, 57

Jania capillacea, 95
Johannesbaptistia pellucida, 4

Lamprocystis roseo^persicina, 81
Laurencia Coralopsis, 100

gemmifera, 100

obtusa, 100

papillosa, 100

Poitei, 100

Leptobasis striatula, 130
Leptothrix bullosa, 56

hinnulea, 54

laminosa, 58

ochracea, 171

symplocoides, 132

tenax, 48, 119, 171

tinctoria, 58
Lyngbya aestuarii, 9, 47, 118, 170

aestuarii f. aeruginosa, 47

arboricola, 39

arenaria, 58

cataracta, 58

Chungii, 134

confervoides, 9, 119

confervoides f. violacea, 119

dendrobia, 39

erecta, 191

gigantea, 12, 51, 121, 174

Giuseppei, 135

guaymensis, 136

hahatonkensis, 11, 50

hinnulea, 54

Holdenii, 8

lutea, 10

magnifica, 170

major, 58

majuscula, 47, 118

Martensiana var. calcarea, 159

membranacea, 58

Notarisii, 39

180 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOLUME 20

Lyngbya ochracea, 10, 48, 171

ocreata, 118, 170

Patrickiana, 135

Phormidium var. rivularis, 54, 131

putealis, 47, 119

rosea, 118

scylonematoides, 118, 171

semiplena, 9, 47

Simmonsiae, 9

sordida, 118

sordida f. rosea, 118

splendens, 39

subconfervoides, 46, 117

sublilis, 8

vermicularis, 58

versicolor, 48, 119, 171

vulgaris, 58

Wollei, 45
Lyngbyopus Willei, 115

Mastigobryum fertile, 57

luteum, 57

Mastigocoleus testarum, 108
Mastigonema Donnellii, 47

elongatum, 57

fibrosum, 57

fuscum, 30, 158

halos, 57

sejunctum, 57

velutinum, 29

violaceum, 30, 158
Mastigothrix turgida, 29, 158
Microckaete diplosiphon, 32, 160

grisea, 6

striatula, 130

tenera var. tenuior, 160
Microcoleus acutissimus, 44, 117

anguiformis, 58

calif ornicus, 167

chthonoplastes, 8, 44, 58, 117, 167

confluens, 134

gracilis, 58

hyalinus, 58

lacustris, 45, 58

paludosus var. acuminatus, 114

pulvinatus, 41

purpureus, 44, 117

Ravenelii, 39

rupicola, 167

sociatus var. minor, 133

tenerrimus, 8

vaginatus, 8, 117, 168

Weeksii, 116
Microcystis, 67

aeruginosa, 74

aeruginosa var. major, 75

aeruginosa f . occidentalis, 75

angulosa, 82

atra, 82

atrovirens, 82

austriaca, 81

caerulea, 74

densa, 82

deusta, 82

Donnellii, 14, 81

elabens, 80, 81

firma, 81, 82

flos-aquae, 75

fuscolutea, 82

glauca, 72, J25

Grevillei, 82

holsatica, 73

ichthyoblabe, 74

ichthyoblabe var. violacea, 81

incerta, 73

littoralis, 81

Zoftato, 27, 81

marginata, 81, 150

mellea, 82

mensmopedioides, 82

minor, 81

AToM, 81

ochracea, 75

olivacea, 81

o»ahs, 125

paMfda, 73, 82

paludosa, 81

parasitica, 81

Parqliniana, 81

piscinalis, 82

prasina, 75

protogenita, 82

pulverea var. incerta, 73

punctiformis, 82

Reinboldii, 81

robiista, 75

rosea, 82

rupestris, 81, 82, 150

sanguinea, 82

scripta, 75

splendens, 125

umbrina, 81

violacea, 82

viridis, 74
Microhaloa aeruginosa, 74

aurantiaca, 82

botryoides, 82

elabens, 80, 81

ichtyoblabe, 74

lodes, 82

Pini-turionum, 83

protogenita, 83

rupestris, 150
Monocapsa stegophila, 148
Myxophyceae, 3, 17, 107, 145

Nodularia Harveyana, 6, 157

paludosa, 55

spumigena, 157
Nostoc amplissimum, 156

caeruleum, 26, 56

caladarium, 154

calcicola, 56

carneum, 155

INDEX

181

comminutum, 56

commune, 5, 25, 109, 156

commune var. flagelliforme, 26

ellipsosporum, 155

Linckia, 155

macrosporum, 56

microscopicum, 26, 57

Muscorum, 5, 155

parmelioides, 27, 109, 156

piscinale, 5, 25

pruniforme, 26, 56

rivulare, 25, 155

rupestre, 56

sphaericum, 56, 156

sphaerpides, 57

spongiiforme, 155

tenuissimum, 56

verrucosum, 27, 109
Nostocaceae, 5, 25, 109, 155
Nostochopsis, 56

Oncobyrsa Castagnei, 150
Oscillaria Bonnemaisonii, 58

brevis, 59

chalybea, 58

crassissima, 59

cruenta, 58

detersa, 58

gracillima, 59

leptotricha, 58

limosa, 59

littoralis, 58

natans, 58

Porettana, 59

subsalsa var. dulcis, 59
Oscillatoria additica, 116

americana, 174

amoena, 175

amphibia, 13, 53, 175

animalis, 53

articulata, 54

articulata var. circinata, 54

Bonnemaisonii, 59, 121

Boryana, 176

brevis, 13, 54, 175

brevis var. neapolitana, 13

chalybea, 54, 59, 175

chlorina, 174

claricentrosa, 45

Corallinae, 52

cruenta, 59

curviceps, 52

formosa, 13, 53, 175

Grunowiana var. articulata, 54

limosa, 12, 51

luteola, 13, 53

margaritifera, 12, 52

maricola, 121

minnesotensis, 136

nigro-viridis, 12

obtusa, 12, 51, 121, 174

ornata, 12, 52

princeps, 12, 51, 121, 174
princeps f. purpurea, 121, 174
proboscidea, 12, 51, 121
refringens, 12, 51, 121
salinarum, 13, 53
sancta, 174

sancta var. aequinoctialis, 51
sancta var. caldariorum, 51
sonorensis, 141
sordida, 10
splendida, 53, 175
splendida f. uncinata, 175
tenuis, 12, 52, 121, 174
tennis var. levis, 12, 52
tenuis var. natans, 59
terebriformis, 176
tortuosa, 165
trapezoidea, 175
Oscillatoriaceae, 7, 39, 114, 162

Padina sanctae-crucis, 92

Vickersiae, 92
Palmella Castagnei, 150

Grevillei, 147

marginata, 150

rupestris, 150
Pencillus Lamourouxii, 92
Peniocystis purpurea, 151
Petalonema alatum, 34, 111

crustaceum, 35

densum, 35, 111
Phaeophyceae, 92

Phormidium angustissimum var. saxicola,
119 •

arenarium, 58

autumnale, 1, 50

autumnale var. minus, 49, 120

californicum, 138

Corium, 49

Corium var. capilatum, 47, 118

Crosbyanum, 119

durum, 39

epiphyticum, 169

favosum, 11, 50

Gardnerianum, 140

glaciale, 169

Groesbeckianum, 137, 171

Hancockii, 139

Hendersonii, 119

hydrocoleoides, 140

interruptum, 58

interruptum var. capitatum, 47, 118

interruptum var. rigidum, 24, 108, 153

inundatum, 11, 49, 120

Joannianum, 58

laminosum, 171

leptodermum var. capitatum, 11, 49,
120, 173

luridum, 48

membranaceum, 58

minneso tense, 136

mucosum, 171

182 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOLUME 20

Phormidium muscicola, 68

olivaceum, 58

papyraceum, 49, 120

penicillatum, 121

pulvinatum, 117

purpurascens var. elegans, 11, 49, 120

Retzii, 11, 49, 58, 120, 173

Richardsii, 139

rubriterricola, 170

scytonematicola var. minus, 169

Standleyi, 139

Steyermarkii, 137

subfuscum, 58, 173

subfuscum var. Joannianum, 11, 50, 58

submembranaceum, 50

tenue, 49, 58, 172

tenue var. marinum, 118

thermale, 138

Treleasei, 48, 172

uncinatum, 11, 50, 121, 173

valderianum, 48, 120, 173

Weissii, 10, 49
Plectonema Battersii, 136

Cloverianum, 134

flexuosum, 108, 153

Golenkinianum, 8

Nostocorum, 46, 117, 134, 169

tenuissimum, 165

Tomasinianum, 46, 117

Wollei, 45, 117, 170

Pleurocapsa amethystea var. Schmidtii,
126

Deeveyi, 126

fuliginosa, 126

Kerneri, 125

varia, 149
Pleurococcus magma, 148

pulvereus, 72

rufescens, 148

turgidus, 149
Polycystis aeruginosa, 74

aeruginosa var. major, 74

elabens, 80, 82

elabens var. ichthyoblabe, 74

firma, 82

flos-aquae, 74

flos-aquae var. prasina, 74

flos-aquae var. scripta, 74

fuscolutea, 83

glauca, 125

ichthyoblabe, 74

ichthyoblabe b. purpurascens, 82

incerta, 73

insignis, 74

litloralis, 82

marginata, 82, 150

marginata var. minor, 75

ochracea, 74

Packardii, 82

pallida, 73, 82

piscinalis, 83

prasina, 74

pulverea, 72

reticulata, 83

scripta, 74

stagnalis, 73

violacea, 82

viridis, 74

Polysiphonia ramentacea, 100
Porphyrosiphon fuscus, 114, 130, 162

Kaernbachii, 39

Notarisii, 39, 114

Notarisii var. major, 39

robustus, 39

Velasquezii, 130
Protococcus magma, 148

rufescens, 148

turgidus, 4, 149

violaceus, 147
Protokuetzingia australasica, 102

Schottii, 100

Rhizoclonium Kochianum, 90
Rhodophyceae, 95
Rhodophyllidaceae, 96
Rhomelaceae, 99
Rivularia dura, 57

echinulata, 31

flagelliformis, 6, 32, 110, 160

haematites, 31, 51, 159

natans, 6, 32, 110, 160

nitida, 6

paradoxa, 32

Pisum, 32
Rivulariaceae, 6, 28, 109, 157

Sargassum filipendula, 93

fluitans, 94

Hystrix var. spinulosa, 53

natans, 94

polyceratium, 94

vulgare, 95

Schizosiphon crustiformis, 57
Schizothrix acuminata, 114

acutissima, 162

aikenensis, 43

arenaria, 43

calcicola, 44, 165

calif ornica, 165

chalybea, 42, 115

coriacea, 166

fragilis, 165

Friesii, 43, 116

Giuseppei, 133

Hancockii, 139

Hancockii f. submersa, 139

hyalina, 58

lacustris, 44, 115, 166

Lamyi, 41, 115

lardacea, 43, 166

Macbridei, 164

mexicana, 115

Muelleri, 7, 46, 115

purcellii, 43, 116, 157, 164

INDEX

183

purpurascens, 7
purpurascens var. cruenta, 40
rhodochlamys, 158
rivularis, 131
rosea, 132
roseola, 132
rupicola, 167
Simmonsiae, 9
Stricklandii, 165
symplocoides, 132
tinctoria, 115
vaginata, 44
violacea, 115
Wollei, 41

Scytonema alatum, 111
ambiguum, 21t, 58, 108, 153
Austinii, 36
azureum, 38, 113, 162
badium, 24, 108, 153
Brandegeei, 35
caldarium, 38, 113, 161
Castellii, 58
cataracta, 35
cincinnatum, 38, 113
conchophilum, 108
cortex, 37

cortex f. brunneum, 37, 162
cortex f. corrugatum, 37, 162
cortex f. saxicola, 56
crassum, 111
crispum, 38, 113
crustaceum, 35, 58
crustaceum var. incrustans, 35
densum, 35, 111
dubium, 58
evanescens, 35, 111
figuratum, 36, 111, 160
Gardneri, 153

gracile var. lolypotrichoides, 7, 36
guyanense, 7, 38, 112
guyanense var. epiphyllum, 112
gwyanense var. minus, 7, 38, 112, 161
Heppii, 34
hirtulum, 58

Hofmannii, 7, 37, 112, 162
Hofmannii f. brunneum, 37, 162
hyalinum, 112
javanicum, 112
junipericola, 33, 113
Kaernbachii, 39
Millei, 113

mirabile, 35, 36, 58, 111, 160
mirabile var. majus, 112
multiramosum, 161
Myochrous, 35, 111, 160
Notarisii, 58
occidentals, 162
ocellatum, 7, 38, 111, 161
ocellatum var. constrictum, 161
pulchellum, 161
spirulinoides, 161
stuposum, 38, 113, 162

subgelatinosum, 162

tenellum, 161

tenue, 153

tolypotrichoides, 7, 36, 161

varium, 38, 112

velutinum, 111

Wolleanum, 35

Scytonemataceae, 6, 32, 111, 160
Sirocoleum guyanense, 117

Kurzii, 116
Sirosiphon acervatus, 23

argillaceus, 23

Brandegeei, 55

compactus, 56

crustaceus, 56

lignicola, 23

pulvinatus, 56

pulvinatus f. mamillosus, 23
Solieraceae, 96
Sommierella hormoides, 24
Sphaerogonium polonicum, 153
Sphaerozyga Hassallii, 57

polyspermum, 57

Rolfsii, 57

saccate, 27

Smithii, 57

variabilis, 57
Spirulina densa, 176

duplex, 56

Jenneri, 59

labyrinthiformis, 176

major, 13, 176

sorcah's, 13, 122

subsalsa, 14, 54, 176

tenerrima, 13, 122

Weissii, 141
Spyridia aculeata var. hypneoides, 99

filamentosa, 99
Stigonema anomalum, 24

canadense, 22

contortum, 22

hormoides, 24

hormoides var. rhizodes, 56

informe, 5, 23

mamillosum, 22

mamillosum f. robustum, 5, 22

minutum, 4, 23

multipartitum, 22

ocellatum, 24

panniforme, 23

robustum, 5, 22

thermale, 24

Stigonemataceae, 4, 22, 108, 153
Symphyosiphon ambiguus, 58

Austinii, 36

Bornetianus, 56

Castellii, 58

crustaceus, 58

hirtulus, 58

Wollei, 38
Symploca atlantica, 118

Howei, 117

184 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOLUME 20

Symploca hydnoides, 117

Kieneri, 170

laete-viridis, 118

muralis, 46, 170

muralis var. minor, 46, 170

Muscorum, 9, 47, 118

Muscorum var. rivularis, 51, 131

prof undo, 121

roseola, 132

symbiotica, 170

terrestris, 58

thermalis, 170
Symplocastrum Brittonae, 43, 116

Friesii, 43, 116

Tildenia dura, 110

pilosa, 110
Tolypothrix bombycina, 33

byssoidea, 33, 113

distorta, 57

flaccida, 57

geminata, 58

lanata, 33

muscicola, 58

pulchra, 57
Ravenelii, 56
rupestris, 7, 33
tenuis, 7, 33, 58
tenuis f . bryophila, 58
Wartmanniana, 58
Turbinaria turbinata, 95

Ulva Lactuca, 90

Lactuca var. latissima, 90
Ulvaceae, 89

Valoniaceae, 90

Wollea saccata, 27
Wurdemannia miniata, 96

Xenococciis acervatus, 125
Kerneri, 125

Zonaria variegata, 92
Zonotrichia haematites, 57
paradoxa, 32

UNIVERSITY OF ILLINOIS-URBANA