CENTRAL CIRCULATION BOOKSTACKS

The person charging this material is re-
sponsible for its renewal or its return to
the library from which it was borrowed
on or before the Latest Date stamped
below. You may be charged a minimum
fee of $75.00 for each lost book.

Theft, mutilation, and underlining of books are reasons
for disciplinary action and may result In dismissal from
the University.

TO RENEW CALL TELEPHONE CENTER, 333-8400
UNIVERSITY OF ILLINOIS LIBRARY AT URBANA-CHAMPAIGN

MAR 0 7 1999

MAR 0 2 1999

When renewing by phone, write new due date below
previous due date. L162

Digitized by the Internet Archive
in 2007

https://archive.org/details/filamentousmyxopfidrou

THE FILAMENTOUS MYXOPHYCEAE
5; OF JAMAICA

vv„ *• ' v . > • i -- '/£.

BY

FRANCIS DROUET

CUKATOR OF CRYPTOGAMIC BOTANY

BOTANICAL SERIES
FIELD MUSEUM OF NATURAL HISTORY
VOLUME 20, NUMBER 5
JUNE 15, 1942

PUBLICATION 518

CENTRAL CIRCULATION BOOKSTACKS

The person charging this material is re-
sponsible for its return to the library from
which it was borrowed on or before the
Latest Date stamped below.

Theft, mutilation, and underlining of books are reasons
for disciplinary action and may result in dismissal from
the University.

TO RENEW CALL TELEPHONE CENTER, 333-8400

UNIVERSITY OF ILLINOIS LIBRARY AT URBANA-CHAMPAIGN

MAR 1 9 1983

MAR 0 6 1993

When renewing by phone, write new due date below
previous due date. L162

THE FILAMENTOUS MYXOPHYCEAE
OF JAMAICA

BY

FRANCIS DROUET

CURATOR OF CRYPTOGAMIC BOTANY

BOTANICAL SERIES

FIELD MUSEUM OF NATURAL HISTORY
VOLUME 20, NUMBER 5

JUNE 15, 1942

PUBLICATION 518

PRINTED IN THE UNITED STATES OF AMERICA
BY FIELD MUSEUM PRESS

THE FILAMENTOUS MYXOPHYCEAE OF JAMAICA

Francis Drouet

F. S. Collins in Proc. Amer. Acad. 37 : 231-270 (1901) reviewed
the earlier literature on the algae of Jamaica and interpreted the
specimens known to him at that time. The myxophyceae included
in his list were principally those collected by J. E. Humphrey and
by C. E. Pease and E. Butler during the period 1891-1901.

Since that time many specimens by various collectors have
accumulated in herbaria. The largest collection is that made by
C. R. Orcutt during 1927-29, mostly of species inhabiting soil and
rocks from many parts of the island. Some of Orcutt’s specimens
were sent to the British Museum (Natural History); most went to
the United States National Museum and were distributed to various
people and institutions through my personal herbarium and that
of Professor Wm. Randolph Taylor during and prior to 1938. The
late M. A. Howe visited Jamaica in 1906-07 and secured numerous
marine specimens, especially from the north coast and from the
vicinity of Kingston. I. F. Lewis collected in the eastern part of
the island during trips in 1906 and 1908; many of his specimens
were issued with published records by Collins, Holden & Setchell
in Phycotheca Boreali-americana. Other botanical collectors, includ-
ing F. S. Earle in 1902, L. M. Underwood in 1903, A. E. Wight in
1905-06, S. Maxwell in 1909, W. Harris in 1914, W. R. Maxon and
E. P. Killip in 1920, and B. M. Davis in 1926, picked up specimens
here and there.

Our knowledge of the inland aquatic algae of Jamaica has ad-
vanced little since 1901, as indicated by the absence of specimens
of Anabaena in herbaria and by the paucity of species of Nostoc,
Phormidium, Oscillatoria, and Spirulina listed here. Likewise many
species of the soil and of brackish and salt water abundantly repre-
sented in herbaria from neighboring islands are conspicuously
absent in Jamaican collections. On the other hand the collectors
of the flora have claimed no more than secondary interest in the
myxophyceae; they have picked up only random specimens during
brief periods of work chiefly in the eastern quarter of the island.
It may be surprising, therefore, that so large a number of species
has been found in the material thus far accumulated. Speculation
upon the relationship of the blue-green algal flora of Jamaica with
that of other West Indian islands and of tropical America in general

107

108 Field Museum of Natural History— Botany, Vol. 20

may well be reserved until much more collecting has been done in
the region.

Specimens cited below are to be found in the herbaria indicated
by abbreviations as follows: BM, British Museum (Natural History);
C, Herbarium of the University of California; D, Herbarium of
Francis Drouet; F, Farlow Herbarium of Harvard University;
FM, Cryptogamic Herbarium, Field Museum of Natural History;
G, Herbarium of Goucher College, Baltimore; Mo, Herbarium of
the Missouri Botanical Garden; N, Herbarium of the New York
Botanical Garden; P, Herbarium of the University of Pennsylvania;
S, Naturhistoriska Riksmuseet, Stockholm; T, Herbarium of
Wm. Randolph Taylor; U, United States National Museum.

Stigonemataceae

Fischerella ambigua (Born. & Flah.) Gom. Journ. de Bot.
9: 52 (1895). Scytonema ambiguuvt Kiitz. ex Born. & Flah. Ann.
Sci. Nat. VII Bot. 5: 100 (1887). S. badium Wolle ex Born. & Flah.
(as sp. inquir.) ibid. 5: 111 (1887). Phormidium interruptum var.
rigidum Gardn. Mem. N. Y. Bot. Gard. 7: 44 (1927). Plectonema
flexuosum Gardn.1 ibid. 7: 47 (1927). — On soil. One specimen,
Jamaica: Lewis, 1908 (C).

Hapalosiphon pumilus (Kiitz.) Kirchn. ex Born. & Flah. ibid.
5: 61 (1887). H. fontinalis (Ag.) Born. Bull. Soc. Bot. France 36:
156 (1889). H. brasiliensis Borge Ark. f. Bot. 15 (13): 94 (1919). —
The one collection, from fresh water, is that listed by Collins (see
the first paragraph of this paper) as H. fontinalis. ST. MARY : on
rocks in Wag Water river, Castleton, Humphrey 397a, Apr. 1893
(G, N).

Mastigocoleus testarum Lagerh. ex Born. & Flah. ibid. 5:
54 (1887). Scytonema conchophilum Humphr. apud Coll. Proc.
Amer. Acad. 37: 241 (1901). — Marine. The type (and only) collec-
tion of S. conchophilum contains old masses of Mastigocoleus testarum
in which the numerous hormogonia have begun to grow and have
burst out of the old and brown sheaths in many places, with the
resulting appearance of scytonematoid branching. In some of the
shells of the one collection M. testarum (as reported in Collins’ list)
is preserved in excellent condition. Kingston: in shells and bones,
Navy Yard, Humphrey, Aug. 1997 (type of Scytonema conchophilum,
G; Phyc. Bor. -amer. LI I, FM, T).

1 The type of P. flexuosum in the New York Botanical Garden (Puerto rico:
on soil in the woods, Coamo Springs, N. Wille 272b, Jan. 1915) is an undeveloped
mass of Fischerella ambigua.

Filamentous Myxophyceae of Jamaica

109

Nostocaceae

Nostoc commune Vauch. ex Born. & Flah. Ann. Sci. Nat. VII
Bot. 7: 203 (1888). — On wet soil and rocks. The Humphrey speci-
mens cited are those referred to in Collins’ list. PORTLAND: on damp
earth, Port Antonio, Humphrey, July 1897 (FM, N). ST. THOMAS:
Arntully, Orcutt 5601 (BM, D, F, N, S, U); Farm Hill, Orcutt 51+63,
1928 (BM); Moy Hall, Orcutt 6828, Nov. 1928 (D, F, N, U). ST.
Andrew: on sandy soil, Constant Spring, Humphrey 365, Apr. 1893
(G, N). WESTMORELAND: Darliston, Orcutt 6227, 6228, 6231, 6235,
Aug. 1928 (BM, D, F, N, S, U). Jamaica: on earth, Green Castle,
Orcutt 1+555, Jan. 1928 (D, F, N, U).

Nostoc verrucosum (L.) Vauch. ex Born. & Flah. ibid. 7: 216
(1888). — In freshwater streams. Included here is the material
reported by Collins. Portland: Stone Valley river, Orcutt 581+1+,
1928 (BM, D, F, N, S, U). st. mary: on rocks in Wag Water river,
Castleton, Humphrey, Apr. 1893 (G).

Nostoc parmelioides Kiitz. ex Born. & Flah. ibid. 7: 219 (1888).
— In freshwater streams. The one collection is the N. microscopicum
of Collins’ report, st. Andrew: on sides of and steps into the
reservoir, Constant Spring, Humphrey 361, Apr. 1893 (G, N).

Hormothamnion enteromorphoides Grun. in Born. & Flah.
ibid. 7: 260 (1888). — In quiet marine waters. The specimens
reported by Collins are included here. KINGSTON: on coral reef,
Navy island, Kingston harbor, Humphrey, June 1897 (N). ST. ann:
in shallow water, St. Anns Bay, Humphrey, Mar. 1893 (Phyc. Bor.-
amer. 56, D, FM, N, T). ST. James: Montego Bay, Davis, 1926 (T).
Jamaica: Humphrey (Coll. N. Amer. Alg. 23, D, FM, N).

Cylindrospermum muscicola Kiitz. ex Born. & Flah. ibid. 7:
254 (1888). C. caeruleum Dick, ex Born. & Flah. (as sp. inquir.)
ibid. 7: 255 (1888). — On wet soil and in shallow fresh water. Speci-
mens reported by Collins are here cited. ST. thomas: Moy Hall,
Orcutt 701+8, Nov. 1928 (D, F, N, U). ST. MARY: Castleton, Humphrey
361+ (N); on sides of reservoir, Botanical Garden, Castleton, Hum-
phrey 1+07, Apr. 1893 (N).

Rivulariaceae

Calothrix JULIANA (Menegh.) Born. & Flah. Ann. Sci. Nat.
VII Bot. 3: 348 (1886). Homoeothrix juliana (Born. & Flah.)
Kirchn. apud Geitl. Rabenh. Kryptogamenfl. 14: 575 (1932). — On
rocks in freshwater streams. The one collection is reported by
Collins. ST. ann: Roaring river, Humphrey 321+, Mar. 1893 (G, N).

110 Field Museum of Natural History — Botany, Vol. 20

Calothrix aeruginea Thur. ex Born. & Flah. ibid. 3: 357
(1886). — On plants and other objects in marine and brackish water.
The one collection is recorded as C. confervicola by Collins. Port-
land: on several algae, Navy island, Port Antonio, Humphrey 236,
Mar. 1893 (C, G, N).

Calothrix Contarenii (Zanard.) Born. & Flah. ibid. 3: 355
(1886). — On wood and rocks in intertidal zones and slightly above.
The one collection reported by Collins, ST. mary : on wreck on beach,
Port Maria, Humphrey, Mar. 1893 (G).

Calothrix Crustacea Thur. ex Born. & Flah. ibid. 3: 359
(1886).- — On rocks and other objects between tides and in the
spray-zone above. Kingston: on wall of a littoral cavern, rocks
below Fort Clarence, Howe 1+651+, 1+655, Dec. 1906 (D).

Calothrix pilosa Harv. ex Born. & Flah. iibid. 3: 363 (1886).
Tildenia pilosa Polj. Bull. Jard. Bot. Princip. URSS 27: 327 (1928).
T. dura Polj. ibid. 27 : 329 (1928).— Chiefly on rocks and sand between
tide marks. Portland: on Bostrychia tenella, Port Antonio, Pease
& Butler (D, N). HANOVER: on rocks near Sandy bay, Howe 1+391+,
Jan. 1907 (N). Westmoreland: on rocks, Robins bay, Orcutt 1+682,
Jan. 1928 (BM, D, F, N, S, U).

Dichothrix Bornetiana Howe Bull. Torr. Club 51: 357 (1924).
— On rocks and shores between tide marks, hanover: on stones
near Sandy bay, Howe 1+91+0, Jan. 1907 (N).

Dichothrix fucicola (Kiitz.) Born. & Flah. ibid. 3: 379 (1886).
— Epiphytic on larger marine algae. One specimen cited here is in
part the basis for Collins’ record of D. penicillata. KINGSTON: on
seawall, Gun Cay, Howe 1+611, Dec. 1906 (D,N). Jamaica: on
Dictyota dichotoma, Pease & Butler, 1900 (N).

Dichothrix penicillata Zanard. ex Born. & Flah. loc. cit.
(1886). — Epiphytic on larger marine algae. One collection here was
listed by Collins. ST. mary: on Cymopolia barbata, Port Maria,
Humphrey, Mar. 1893 (Phyc. Bor.-amer. 62, FM, G, N). Kingston:
Gun Cay, Howe 1+612, Dec. 1906 (N). ST. JAMES: on Digenia on a
littoral reef, Montego Bay, Howe 1+772, Jan. 1907 (D, N).

Gloeotrichia natans (Hedw.) Rabenh. ex Born. & Flah. ibid.
4: 369 (1886). Rivularia natans (Hedw.) Welw. ex Born. & Flah.
(pro synon.) loc. cit. (1886). Calothrix scytonemicola var. brasiliensis
Borge Ark. f. Bot. 19 (17): 5 (1925). Rivularia ( Gloeotrichia )
flagelliformis Gardn. Mem. N. Y. Bot. Gard. 7: 71 (1927). — In
quiet fresh water. The one collection is recorded in Collins’ list.
ST. mary: on floating leaves, Botanic Garden, Castleton, Humphrey
1+13, Apr. 1893 (F, G, N).

Filamentous Myxophyceae of Jamaica

111

Scytonemataceae

Scytonema alatum (Berk.) Borzi ex Born. & Flah. Ann. Sci.
Nat. VII Bot. 5: 110 (1887). Petalonema alatum Berk, ex Born.
& Flah. (pro synon.) loc. cit. (1887). — On objects kept continuously
wet with fresh water, particularly on cliffs. Portland: Stone Valley
river, Orcutt 5853, 1928 (D, F, N, U).

Scytonema crassum Nag. ex Born. & Flah. ibid. 5: 109 (1887).
— On limestone and chalk wet during at least part of the year by
seeping fresh water, less often on soil. Portland: Chepstowe,
Orcutt 1+516, Jan. 1928 (D, U). ST. THOMAS: Arntully, Orcutt 5096,
1928 (BM, D, U); Farm Hill Works, Orcutt 5597, 5598a, May 1928
(BM, D, F, N, S, U).

Scytonema velutinum Rabenh. ex Born. & Flah. ibid. 5: 108
(1887). — On rocks and cliffs wet with fresh water at only certain
seasons of the year. Kingston: on the Palisades, Howe 1+561,
Dec. 1906 (D, FM, N). st. Catherine: on roadside bank, Bog
Walk, Howe, Dec. 1906 (FM, N).

Scytonema densum (A. Br.) Born, ex Born. & Flah. ibid. 5:
109 (1887). S. evanescens Gardn. Mem. N. Y. Bot. Gard. 7: 71
(1927). Petalonema densum (Born. & Flah.) Mig. apud Geitl.
Rabenh. Kryptogamenfl. 14: 793 (1932). — On soil and rocks con-
tinuously wet with fresh water. The one collection is recorded by
Collins. Portland: in turf, moist places, Port Antonio, Humphrey
1+21, Apr. 1893 (FM, G, N).

Scytonema Myochrous (Dillw.) Ag. ex Born. & Flah. ibid. 5:
104 (1887). — On rocks and soil wet at intervals with fresh water.
ST. THOMAS: Arntully, Orcutt 2821, Sept. 1927 (BM); Farm Hill,
Orcutt 51+1+1+a (BM).

Scytonema figuratum Ag. ex Born. & Flah. ibid. 5: 101 (1887).
5. mirabile (Ag.) Born. Bull. Soc. Bot. France 36: 155 (1889), not
Wolle.— On rocks and soil wet at least intermittently with fresh
water. ST. thomas: Moy Hall, Orcutt 7050, Nov. 1928 (D, N, U);
Farm Hill Works, Orcutt 5598, May 1928 (BM).

Scytonema ocellatum Lyngb. ex Born. & Flah. ibid. 5: 95
(1887). — On soil, rocks, and trunks of trees. One collection cited
below was recorded and distributed by Lagerheim in Wittr. &
Nordst. Alg. exs. 28: 1322b (1896). ST. thomas: Farm Hill Works,
Orcutt 5598b, May 1928 (D, F, N, U); Arntully, Orcutt 5618, 5791+,
1928 (BM, D, F, N, S, U). st. mary: near Castleton Botanical
Garden, Underwood 153a, Jan. 1903 (FM, N). st. Andrew: on

112 Field Museum of Natural History— Botany, Vol. 20

overhanging cliffs, Lewis, July 1906 (N), idem, Morces Gap (N);
in cortice arboris ad Constant Spring, G. Lagerheim, Dec. 1892
(Wittr. & Nordst. Alg. exs. 1322b, FM, N). Kingston: on roadside
bank near Hope Gardens, Howe, Dec. 1906 (D, FM, N); Hope,
Earle 1+81+, 1902 (D, N). st. Catherine: walls of limestone cave,
Troja, Wight, May 1909 (N). JAMAICA: Fern Hill, Orcutt 31+27,
2537, Oct. 1927 (D, F, N, U); Ferry river, Orcutt 6276, 1928 (BM,
D, F, N, U); Weireka, Orcutt 6267, 1928 (D, N, U); Geddy Hall,
Maxwell, 1909 (BM); on stone walls. Resource, Lewis, 1908 (N).

Scytonema varium Ktitz. ex Born. & Flah. ibid. 5: 97 (1887). —
Subaerial on rocks and other objects in fresh water. The specimen
reported as S. Archangelii by Collins belongs here. ST. mary: on
moist rocks by spring, Castleton, Humphrey, Apr. 1893 (G).
Jamaica: Eggers 3557 (FM).

Scytonema Hofmannii Ag. ex Born. & Flah. ibid. 5: 97 (1887).
— Subaerial in fresh water, or aerial on rocks, soil, leaves, tree-trunks,
etc. The specimens recorded as S. javanicum in Collins’ list are
placed here. Portland: trail from Morces Gap to Vinegar Hill,
Maxon & Killip 1299, Mar. 1920 (N, U); lower slopes of Blue
Mountain peak, Maxon & Killip 1169, Mar. 1920 (N, U); road from
Silver Hill Gap to Hardware Gap, Maxon & Killip 121+1+, Mar. 1920
(N, U). st. THOMAS: on leaves of trees, Bath, Humphrey (Phyc.
Bor.-amer. 1258, D, N, T). ST. mary: on flower-pot in garden,
Castleton, Humphrey, Apr. 1893 (G). ST. Andrew: Morces Gap,
Lewis (N); on rock near headwaters of Clyde river, Lewis, July
1906 (N). st. CATHERINE: Troja, Orcutt 1+638, Jan. 1928 (BM).
JAMAICA: near Green river fording, Harris 10051, May 1914 (D, N).

Scytonema javanicum (Ktitz.) Born, ex Born. & Flah. ibid. 5:
95 (1887). S. hyalinum Gardn. Univ. Calif. Publ. Bot. 14: 7 (1927).
S. guyanense var. epiphyllum Gardn. N. Y. Acad. Sci. Sci. Surv.
Porto Rico 8: 299 (1932). — On continuously wet leaves and trunks
of trees, st. mary: Castleton, Humphrey, Apr. 1893 (G). JAMAICA:
Glenburnie mountain, Orcutt 7726, Jan. 1929 (D, U).

Scytonema guyanense (Mont.) Born. & Flah. ibid. 5: 74 (1887).
S. mirabile var. majus Gardn. Mem. N. Y. Bot. Gard. 7: 78 (1927).
S. guyanense var. minus Gardn. ibid. 7: 79 (1927). — On rocks, soil,
and other objects wet intermittently with fresh water. Here is
placed the specimen termed S. ocellatum in Collins’ list. Portland:
Spring Garden near Buff Bay, Orcutt 1+769, Feb. 1928 (BM, D, F,
N, S, U). ST. thomas: Moy Hall, Orcutt 581+3, 1928 (D, U) ; Arntully,
Orcutt 5108, Apr. 1928 (BM, D, F, N, S, U), idem on rocks, Orcutt

Filamentous Myxophyceae of Jamaica

113

6907, Nov. 1928 (BM, D, N, S, U). ST. MARY: on bank, Stileman
bay, Orcutt 4.589, Jan. 1928 (D, U); on old palm stems, Castleton,
Humphrey, Apr. 1893 (G). st. Andrew: Morces Gap, Orcutt 5564,
1928 (BM, D, F, N, U); near Constant Spring, Orcutt 6307, 6313
(BM). Kingston: Long mountain, Orcutt 6267, Aug. 1928 (BM).
ST. Catherine: Great Salt pond, Cookson estate, Orcutt 6465,
Sept. 1928 (D, N, U); Troja, Orcutt 4638, Jan. 1928 (D, N, U).
WESTMORELAND: Darliston, Orcutt 6217, 1928 (BM, D, F, N, S, U).
Jamaica: Westphalia (Cedar Hurst), Orcutt 3757, Nov. 1927 (BM,
D, U); Fern Hill, Orcutt 3418, 3547, 3609, Oct. 1927 (BM, D, F, N,
S, U); Lewis, 1908 (C); on rock, Orcutt 3563 (BM).

SCYTONEMA Millei Born, ex Born. & Flah. ibid. 5: 93 (1887). —
On soil and rocks. ST. Andrew: Mavis Bank road, Lewis, June
1906 (Phyc. Bor.-amer. 1405, D, FM, N, T). Jamaica: Lewis,
Jan. 1908 (C; Phyc. Bor.-amer. 1557b, FM, N, T).

Scytonema stuposum Born, ex Born. & Flah. ibid. 5: 92 (1887).
S. caldarium Setch. Erythea 7: 48 (1899). S. azureum Tild. Amer.
Alg. 7: 630 (1909). — Subaerial on rocks and other objects in fresh
water. Here are placed two collections reported in the Collins list
as S. crispum. The material distributed by Collins, Holden &
Setchell as S. crispum in Phyc. Bor.-amer. No. 60 is heterogeneous;
in some sets only S. cincinnatum is to be found, in at least one other
only S. stuposum. st. mary: in reservoir, Botanical Garden, Castle-
ton, Humphrey, Apr. 1893 (Phyc. Bor.-amer. 60, T). ST. Andrew:
sides of trough, Constant Spring, Humphrey, Apr. 1893 (G); on
mosses and rocks, Lewis, July 1906 (N). Jamaica: in herb. F. Wolle

(P).

Scytonema cincinnatum (Kiitz.) Thur. ex Born. & Flab. ibid.
5: 89 (1887). S. crispum (Ag.) Born. Bull. Soc. Bot. France 36:
157 (1889). — Floating in quiet fresh water. Part of the material
reported by Collins as S. crispum is placed here. See the remarks
under S. stuposum above. ST. mary: in reservoir, Botanical Garden,
Castleton, Humphrey, Apr. 1893 (Phyc. Bor.-amer. 60, FM, G).
Kingston: in basin, Humphrey, Apr. 1893 (G).

Hassallia byssoidea (Berk.) Hass, ex Born. & Flah. ibid. 5:
116 (1887). Scytonema ( Petalonema ) junipericola Farl. in Coll.
Hold. & Setch. Phyc. Bor.-amer. 16: 756 (1900). Anabaena cupres-
saphila Wolle ex Forti Syll. Myxophyc. 456 (1907). Tolypothrix
byssoidea (Born. & Flah.) Kirchn. apud Forti ibid. 561 (1907). —
On rocks, soil, and trunks of trees wet intermittently with rainwater.
Here are placed the specimens distributed by Collins, Holden &

114 Field Museum of Natural History — Botany, Vol. 20

Setchell as S. ocellatum in Phyc. Bor.-amer. 1559a, b, and as S. Millei
in 1557a. Portland: on steps of courthouse, Port Antonio, Hum-
phrey 1+22, Apr. 1893 (N), Humphrey 1+19 (N). ST. THOMAS: on
concrete foundation, Arntully, Orcutt 5108a, 6912, Apr. and Nov.
1928 (BM, D, N, U). ST. mary: Grays inn, Orcutt l+088a, Dec.
1927 (D, U), idem l+115a, 1+152 (BM); near Castleton Botanic
Garden, Underwood 153, Jan. 1903 (N). st. Andrew: on trees
(Phyc. Bor.-amer. 1559a, FM, N, T), on earth, Cinchona, Lewis,
Jan. 1908 (Phyc. Bor.-amer. 1559b, FM, N, T); Mavis Bank road,
Lewis 16, June 1906 (N); on rocks in canon of the Cane river pear
Kingston, Howe, Dec. 1906 (FM, N). st. Catherine: Troja, Orcutt
1+666, 1+667, Jan. 1928 (BM). st. james: on bark of tree root,
Montego Bay, Howe, Jan. 1907 (N). Jamaica: Lewis, Jan. 1908
(C, Phyc. Bor.-amer. 1557a, FM, N, T); Humphrey 1+05 (N).

Oscillatoriaceae

Porphyrosiphon Notarisii (Menegh.) Kiitz. ex Gon. Ann.
Sci. Nat. VII Bot. 15: 331 (1892). — On soil, rocks, and other objects
intermittently wet with fresh water. See Drouet in Amer. Journ.
Bot. 24: 601 (1937) and Field Mus. Bot. Ser. 20: 39 (1939) for
synonymy of this species. PORTLAND: Port Antonio, Wight, 1909
(D, T); in the mountains along headwaters of Buff river, Pleasant
Hill to Buff Bay, Orcutt 3793, Nov. 1927 (BM, D, F, N, S, U).
ST. THOMAS: Arntully, Orcutt 2708, Aug. 1927 (D, F, N, U), 7021,
Nov. 1928 (BM, D, F, N, S, U). st. Andrew: on rock, trail to
Cinchona, Orcutt 5501, 1928 (BM, D, F, N, U). KINGSTON: road-
side bank near Hope Gardens, Howe, Dec. 1906 (D, N). ST. MARY:
with Scytonema Hofmannii on flowerpot in garden, Castleton,
Humphrey, Apr. 1893 (G). trelawney: Rose Hill, Earle, 1902
(D, N). JAMAICA: Lewis (C; Phyc. Bor.-amer. 1555, FM, T).

Porphyrosiphon fuscus Gom. apud Fr4my Bull. Mus. Hist.
Nat. Paris 33: 115 (1927). — On soil wet occasionally by rains.
Kingston: with Schizothrix acuminata on roadside bank near Hope
Gardens, Howe, Dec. 1906 (FM).

Schizothrix acuminata (Gardn.) Drouet, comb. nov. Micro-
coleus paludosus var. acuminatus Gardn. Mem. N. Y. Bot. 7: 57,
pi. ii, f. 5 (1927). Fila inter alias algas mixta, elongata, laciniata,
pseudoramosa, ramis inferne intricatis, superne subparallelis aut in
fasciculos repentes tortis; vaginis hyalinis demum pallide roseis vel
fusco-roseis, apice hyalinis et acuminatis, firmis, solidis, plus minusve
erosis, non aut vix lamellosis, chlorozincico iodurato laete caerules-

Filamentous Myxophyceae of Jamaica 115

centibus; trichomatibus pallide aerugineis, intra vaginas inf erne
numerosis, superne solitariis vel paucis, parallelis, ad genicula non
constrictis, 4-7 n crassis; articulis diametro trichomatis vulgo
longioribus, subquadratis usque ad duplo longioribus, protoplasmate
inconspicue granuloso; cellula apicali acutissime conica, haud
capita ta. — Growing on soil, rocks, and other objects often wet with
rainwater, usually in mats with other algae. The species is placed
in Gomont’s Section Chromosiphon near 5. purpurascens. Its
distribution as known to me is as follows. PUERTO RICO: on a wall
at Fort San Cristobal, N. Wille 2013a, 1915 (type, N). Jamaica:
Kingston: on roadside bank near Hope Gardens, Howe, Dec. 1906
(FM, N). SONORA: on banks by road to Tastiota southwest of Villa
de Seris, Drouet & Richards 2819a, Nov. 1939 (FM).

Schizothrix Muelleri Nag. ex Gom. Ann. Sci. Nat. VII Bot.
15: 321 (1892). Hydrocoleum Hieronymii Richt. in Hauck & Richt.
Phyk. Univ. 543 (1892). — On rocks and soil often wet with fresh
water. Portland: Mabess, Lewis 20, June 1906 (N).

Schizothrix Lamyi Gom. ibid. 15: 323 (1892).— On soil occa-
sionally wet by rains. ST. thomas: Arntully, Orcutt 5722, 1928
(BM, D, F, N, S, U).

Schizothrix chalybea (Kiitz.) Gom. ibid. 15: 319 (1892). —
On soil and rocks wet with rainwater. See Drouet in Bull. Torr.
Club 64: 603 (1937) for notes on distribution, st. Andrew: on
rocks, Bellevue, Orcutt 601*2, 633b, 1938 (BM, D, F, N, S, U).

Schizothrix violacea Gardn. Mem. N. Y. Bot. Gard. 7: 52
(1927); Drouet Bull. Torr. Club 64: 603, f. 2, 3 (1937). — On soil
and rocks wet with rainwater. ST. thomas: Farm Hill Works,
Orcutt 51*69, 1928 (D, N, U); Arntully, Orcutt 5097, 6807, 1928
(BM, D, F, N, S, U).

Schizothrix lacustris A. Br. ex Gom. ibid. 15: 301 (1892).
Inactis lacustris (Gom.) Forti Syll. Myxophyc. 354 (1907). — On
rocks almost constantly kept wet in fresh water. ST. ann: with
Calothrix juliana on stones in rapid stream, Roaring river, Humphrey
328 (G, N).

Schizothrix tinctoria (Ag.) Gom. ex Ann. Sci. Nat. VII Bot.
15: 303 (1892).— In fresh water. Here are placed the specimens
recorded in Collins’ list as S. coriacea. ST. MARY: in turf on sides
of lily tank, Botanic Garden, Castleton, Humphrey 1+09, Apr. 1893
(C, F, FM, G, N).

Schizothrix mexicana Gom. ibid. 15: 304 (1892). Lyngbyopsis
Willei Gardn. Mem. N. Y. Bot. Gard. 7: 55 (1927). — In fresh water.

116 Field Museum of Natural History— Botany, Vol. 20

For distribution of this species see Drouet in Bull. Torr. Club 65:
286 (1938). The material cited here is that listed by Collins. ST.
mary: on rock in Wag Water river, Castleton, Humphrey 397,
Apr. 1893 (F, G, N) ; with Scytonema stuposum in reservoir, Botanic
Garden, Castleton, Humphrey, Apr. 1893 (Phyc. Bor.-amer. 60, T).

Schizothrix Friesii (Ag.) Gom. ibid. 15: 316 (1892). Sym-
plocastrum Friesii (Gom.) Kirchn. apud Forti Syll. Myxophyc.
347 (1907). Schizothrix purcellii W. R. Tayl. Proc. Acad. Nat. Sci.
Phila. 80: 91 (1928). Symplocastrum Brittonae Gardn. N. Y. Acad.
Sci. Sci. Surv. Porto Rico 8: 287 (1932). — On rocks and soil often
wet with fresh water. ST. ANDREW: slopes of Sir John peak, Harris,
May 1914 (D, N).

Hydrocoleum comoides (Harv.) Gom. ibid. 15: 325 (1892).— On
rocks between tide marks and in tide pools. The last specimen cited
here was reported under this name by W. R. Taylor in Papers Mich.
Acad. Sci. 17: 400 (1933). Kingston: on rocks, Drunkenmans Cay,
Howe 1+707 ,Dec. 1906 (D, N). ST. james: on a littoral reef, Montego
Bay, Howe 1+769, 1+771, Jan. 1907 (FM, N); on the seaward shore of
the Bogue islands, Montego Bay, Howe 1+821, Jan. 1907 (N).
JAMAICA: Abingdon, Or cutt 6208b (T).

Hydrocoleum lyngbyaceum Kiitz. ex Gom. ibid. 15: 337 (1892).
Oscillatoria additica Gardn.1 N. Y. Acad. Sci. Sci. Surv. Porto Rico
8: 270 (1932). — On other algae and rocks between tide marks.
Kingston: on Lithophyllum, Gun Cay, Howe 1+621+, Dec. 1906 (D, N).

Hydrocoleum glutinosum (Ag.) Gom. ibid. 15: 339 (1892). — On
rocks between tide marks. Kingston: Port Royal, Or cutt 6731,
Oct. 1928 (T); Drunkenmans Cay, Howe 1+710 1+711+, Dec. 1906 (N).
ST. JAMES: northern shore of Montego Bay, Howe 1+875, Jan. 1907
(N).

Hydrocoleum floccosum (Hauck) Gom. ibid. 15: 341 (1892).—
On rocks and other algae in marine waters. Hanover: on rocks
near Sandy bay, Howe 1+975, Jan. 1907 (D, N).

SiROCOLEUM Kurzii (Zell.) Gom. ibid. 15: 349 (1892). Micro-
coleus Weeksii Setch. & Gardn.2 Univ. Calif. Publ. Bot. 6: 470
(1918). — On larger plants in marine waters. The specimen from

1 The type of O. additica in the New York Botanical Garden (Puerto rico:
on Amphiroa, Salinas cove near Guanica harbor, Howe 7209, June 1915) consists
of a mass of Hydrocoleum lyngbyaceum in which many of the trichomes have
come out of the sheaths.

2 The type of M. Weeksii in the Herbarium of the University of California
(California: on Griffithsia near Pacific Grove, Monterey county, Mrs. J. M.
Weeks, Feb. 1896) appears to be typical Sirocoleum Kurzii.

Filamentous Myxophyceae of Jamaica

117

Jamaica cited here has trichomes smaller than are described for the
species, hanover: near Sandy bay, Howe 1+977, Jan. 1907 (N).

Sirocoleum guyanense Kutz. ex Gom. ibid.' 15: 348 (1892).—
In brackish water and on mud between tide marks. Jamaica: on
Bostrychia (N).

Microcoleus chthonoplastes (FI. dan.) Thur. ex Gom. ibid.
15: 353 (1892). — On tidal flats and in brackish water. Material
recorded in Collins’ list as both M. chthonoplastes and M. tenerrimus
is placed here. ST. ann: in turf of algae, St. Anns Bay, Humphrey,
Mar. 1893 (G); Runaway bay, Orcutt 6127, 1927-28 (T). Jamaica:
Humphrey 331 (N).

Microcoleus vaginatus (Vauch.) Gom. ibid. 15: 355 (1892).—
On soil intermittently wet by rains. Here is included the specimen
reported under this name by Collins. ST. Andrew: Cinchona,
Lewis 8, 1906 (N). st. Catherine: on moist mud, Rio Cobre, Bog
Walk, Humphrey, Apr. 1893 (G).

Microcoleus acutissimus Gardn. Mem. N. Y. Bot. Gard. 7:
55 (1927); Drouet Amer. Journ. Bot. 24: 603, f. 3 (1937). M. pur-
pur ens Gardn. ibid. 7: 56 (1927). — On soil, rocks, etc. wet inter-
mittently with rain water, st. Andrew: on moist rock in gorge
of Cane river near Kingston, Howe, Dec. 1906 (FM, N).

Plectonema Wollei Farl. ex Gom. Ann. Sci. Nat. VII Bot.
16: 98 (1892). — In fresh water. See Drouet in Field Mus. Bot.
Ser. 20 : 45 (1939). Specimens reported in the Collins list are included
here. st. thomas: in fresh water, Morant Bay, Pease & Butler,
July 1894 (N). ST. ann : in rapid current of Roaring river, Humphrey,
Mar. 1893 (Phyc. Bor. -amer. 55c, FM, N, T).

Plectonema Tomasinianum (Kutz.) Born, ex Gom. ibid. 99
(1892). Lyngbya subconfervoides Borge, Ark. f. Bot. 15 (13): 91
(1919).— In fresh water. Portland: on stones in running water in
gully, Stone Valley river, Orcutt 5881, 5883, 1928 (BM, D, F, N, S, U).

Plectonema Nostocorum Born, ex Gom. ibid. 16: 102 (1892). —
Common in matrices and sheaths of most gelatinous algae. Among
others may be cited one specimen, ST. thomas: with Nostoc commune,
Moy Hall, Orcutt 6828, Nov. 1928 (D, F, N, U).

Symploca hydnoides Kutz. ex Gom. ibid. 16: 106 (1892).
Phormidium pulvinatum Coll, in Britt. & Millsp. Bahaman FI. 621
(1920). Symploca Howei Gardn.1 N.Y. Acad. Sci. Sci. Surv. Porto

1 The type of S. Howei in the New York Botanical Garden (Puerto rico: in
shallow warm water, Cayo Don Luis near Pt. Montalva, Howe 7186, June 1915)
is typical S. hydnoides.

118 Field Museum of Natural History— Botany, Vol. 20

Rico 8: 283 (1932). — On other algae, rocks, etc. between tide marks.
The one Jamaican specimen was recorded by Collins. Jamaica:
Pease & Butler , 1900 (N).

Symploca atlantica Gom. ibid. 16: 109 (1892). — On rocks and
other objects between and just above tide marks, hanover: near
Sandy bay, Howe 1*933, Jan. 1907 (D, N).

Symploca laete-viridis Gom. ibid. 16: 109 (1892). Phormidium
tenue var. marinum Gardn.1 N.Y. Acad. Sci. Sci. Surv. Porto Rico
8: 282 (1932). — On calcareous algae and on rocks between tide marks
and just below. Kingston: in 3 dm. of water, in the harbor, Howe
1*1*72, Dec. 1906 (D).

Symploca Muscorum (Ag.) Gom. ibid. 16: 110 (1892). Phor-
midium Corium var. capitatum Gardn. Univ. Calif. Publ. Bot. 14:
4 (1927). P. interruptum var. capitatum Gardn. Mem. N. Y. Bot.
7: 44 (1927). — Subaerial on soil, rocks, and mosses in fresh water.
PORTLAND: trail from Morces Gap to Vinegar Hill, Maxon & Killip
1317, Mar. 1920 (F, FM, N). Jamaica: on mosses, Lewis, July 1906
(N); G. river, Lewis 21a, July 1906 (N).

Lyngbya sordida (Zanard.) Gom. ibid. 16: 126 (1892). L. rosea
W. R. Tayl. Carn. Inst. Wash. Papers Tortugas Lab. 25: 45 (1928).
L. sordida f. rosea (W. R. Tayl.) Drouet in J. DeToni Diagn. Alg.
Nov. 1 (Myxophyc. iii): 236 (1938). — Chiefly epiphytic on larger
plants in marine waters. KINGSTON: Gun Cay near the harbor,
Howe 1*610, Dec. 1906 (D, N). st. james: on rocks, north shore of
Montego Bay, Howe 1*851*, Jan. 1907 (D, N).

Lyngbya aesTuarii (Mert.) Liebm. ex Gom. ibid. 16: 127
(1892). L. ocreata Gardn.2 Mem. N. Y. Bot. Gard. 7: 39 (1927).
L. scytonematoides Gardn. loc. cit. (1927. — On tidal flats and in
brackish and fresh water, st. Catherine: Fort Augusta, Kingston
harbor, Orcutt 6511*, Oct. 1928 (BM, D, F, S, U); Port Henderson,
Orcutt 6028, 1928 (D, U).

Lyngbya majuscula (Dillw.) Harv. ex Gom. ibid. 16: 131 (1892).
— On rocks and other algae between tide marks. Included here are
the specimens recorded in the Collins list. Portland: Navy island,
Port Antonio, Humphrey 190, Mar. 1893 (C, F, G, N); Port Antonio,

1 The type of P. tenue var. marinum in the New York Botanical Garden
(Puerto Rico: on sand rock, San Juan, Howe 2112, May 1903) is similar to the
original collections of Symploca laete-viridis described by Gomont from Key West.

2 The filaments referred to as L. ocreata and L. scytonematoides in the type
specimens in the New York Botanical Garden (Puerto rico: on damp earth by
Playa, Fajardo, N. Wille 710b and c, Jan. 1915) appear to me to be peculiar growth-
forms of L. aestuarii.

Filamentous Myxophyceae of Jamaica

119

Wight, 1905-06 (S, T), Pease & Butler, July 1894 (F, N), July 1891
(N). Kingston: Gun Cay near the harbor, Howe 1+619, Dec. 1906
(D, N); Drunkenmans Cay, Howe 1+708 (D, N), 1+729 (N), Dec.
.1906. st. james: Montego Bay, Davis, 1926 (FM, T); in a Rhizo-
phora association, Bogue islands, Montego Bay, Howe 1+71+5, Jan.
1907 (C, D, F, N); seaward shore of Bogue islands, Howe 1+821,
Jan. 1907 (D). Jamaica: Pease, 1892 (FM, N); floating in shallow
water, Pease & Butler, July 1900 (Coll. N. Amer. Alg. 11, D, N).

Lyngbya confervoides Ag. ex Gom. ibid. 16: 136 (1892).
L. confervoides f. violacea Coll. Proc. Amer. Acad. 37: 240 (1901). —
On rocks and wood between tide marks. Collins’ type of the f.
violacea and specimens reported as L. aestuarii belong here. Port-
land: Manchioneal bay, Pease & Butler, July 1900 (type of L. con-
fervoides f. violacea, F), ST. Andrew: north shore of Kingston harbor,
Howe 1+683, Dec. 1906 (F, N), 1+681 (D, N). Kingston: on stones
in harbor, Humphrey 381+, Apr. 1893 (C, F, G, N); on Thalassia,
Drunkenmans Cay, Howe 1+725, Dec. 1906 (D, N); in the harbor,
J. E. Duerden, May 1901 (N). st. JAMES: northern shore of Montego
Bay, Howe 1+855, Jan. 1907 (D, N).

Lyngbya putealis Mont, ex Gom. ibid. 16: 143 (1892). — In
fresh water. The one specimen, recorded in the Collins list, [ST.
THOMAS: Morant Bay,] Pease & Butler (N).

Lyngbya versicolor (Wartm.) Gom. ibid. 16: 147 (1892).
Leptothrix tenax Wolle Fresh Water Alg. U. S. 319 (1887). Hypheo-
thrix tenax Wolle ex Forti Syll. Myxophyc. 329 (1907). — In fresh
water. The one collection is that reported in the Collins list. King-
ston: on sides of basin of a fountain, Marine Garden, Humphrey,
Apr. 1893 (Phyc. Bor.-amer. 54b, FM, G, N).

Phormidium Crosbyanum Tild. Amer. Alg. 7: 645 (1909).
P. Hendersonii Howe Smiths. Misc. Coll. 68: 2 (1918). P. angustis-
simum var. saxicola Gardn. N. Y. Acad. Sci. Sci. Surv. Porto Rico
8: 279 (1932). Stratum viride, luteum, fuscum, aerugineum, griseum,
vel roseolum, pulvinatum vel depresso-hemisphaericum, cartila-
gineum, plus minusve calcareum, fills minutis, ad basalem partem
plantae intricatis, superne parallelis, flexilibus; vaginis arctis saepe
diffluentibus, hyalinis, chlorozincico iodurato caerulescentibus; tri-
chomatibus pallide aerugineis, 1-2 n crassis, ad genicula non con-
strictis, ad apices non attenuatis; articulis diametro trichomatis
usque ad duplo longioribus, protoplasmate haud granuloso; cellula
apicali superne rotundata, non capitata. — In shallow tropical marine
waters, forming cushions of leathery texture. As do those of Lyngbya

120 Field Museum of Natural History — Botany, Vol. 20

sordida, Phormidium tinctorium, and certain other species of myxo-
phyceae, the trichomes shrivel in specimens which dry slowly;
preserved material always gives the impression at first of being
hopeless for critical observation. Howe’s observation that the
sheath-material in the type of P. Hendersonii does not become blue
when treated with chlor-zinc-iodine is an error. Among many
specimens of P. Crosbyanum at hand the following have been selected
to illustrate the species and its distribution. Bahama islands:
in a tidal pond, West Caicos, Howe 5701, Dec. 1907 (FM, N).
PUERTO RICO: on rocks, littoral, Santurce, Howe 1929, May 1903
(type of P. angustissimum var. saxicola Gardn., N; isotype, D).
GUADELOUPE: sur le sable, Pointe de Chateaux, J. Feldmann 3760,
avril 1936 (T). TOBAGO: on Buccoo reef, W. R. Taylor 517, 51+7,
Apr. 1939 (FM). HAITI: reef of coral, island off Anse a Margot
(Bayeux) between Cap Haitien and Le Borgne, H. H. Bartlett 1 7996,
June 1941 (FM). CUBA: on reef, Cayo Jutias, Pinar del Rio, Hen-
derson & Bartsch 103, May 1914 (type of P. Hendersonii Howe, U;
isotypes, D, N). JAMAICA: Kingston: in 3 dm. of water in the harbor,
Howe 1+1+72, Dec. 1906 (Mo, N). St. James: near Montego Bay,
Howe 5021, Jan. 1907 (N). PANAMA: on corals in high tide pools,
southeast end of Caledonia harbor, Panama province, W. R. Taylor
21+1, Apr. 1939 (FM). Hawaiian islands: on rock shelf between
tides, Wainae, Oahu, J. E. Tilden (N; isotype of P. Crosbyanum
Tild. in Amer. Alg. 645, FM). Philippines: Lubang, Mindoro prov-
ince, H. S. Villaflores 13, Sept. 1935 (FM); Boquete, vicinity of
Puerto Galera, Mindoro, H. H. Bartlett 11+031+ (FM).

Phormidium valderianum Gom. ibid. 16: 167 (1892).— In fresh
water. Jamaica: ‘Jamaica, Huss' (F).

Phormidium papyraceum (Ag.) Gom. ibid. 16: 173 (1892).
P. autumnale var. minus Gardn. Mem. N. Y. Bot. Gard. 7 : 45 (1927).
— In fresh water. The one specimen is that reported by Hansgirg
in Wittrock & Nordstedt, Algae exsiccatae 16: 776b (1886), as
Lyngbya (. Phormidium ) inundata. ST. ANDREW: ad Gordon Town,
W. Joshua, Oct. 1884 (Wittr. & Nordst. Alg. exs. 776b, FM).

Phormidium inundatum Kutz. ex Gom. ibid. 16: 172 (1892).
P. purpurascens var. elegans Drouet Bot. Gaz. 95: 696 (1934). —
In fresh water. Jamaica: with P. uncinatum, Humphrey 1+26 (N).

Phormidium Retzii (Ag.) Gom. ibid. 16: 175 (1892). P. lepto-
dermum var. capitatum Gardn. Mem. N. Y. Bot. Gard. 7: 43 (1927).
— In fresh water. The one collection is the basis of the record in

Filamentous Myxophyceae of Jamaica

121

Collins’ list. ST. Catherine: in tufts on plants, Rio Cobre, Bog
Walk, Humphrey, Apr. 1893 (F, G, N).

Phormidium uncinatum (Ag.) Gom. ibid. 16: 184 (1892). — In
fresh water. Portland: Stone Valley river, Orcutt 5851, 5863 (D,
N, U). Jamaica: Humphrey 1+26 (N).

Phormidium penicillatum Gom. in Jadin Bull. Soc. Bot. France
40: clix (1893). Symploca profunda W. R. Tayl. Carn. Inst. Wash.
Papers Tortugas Lab. 25: 47 (1928). Oscillatoria maricola Gardn.
N. Y. Acad. Sci. Sci. Surv. Porto Rico 8: 270 (1932). — In quiet
marine waters. See Drouet in Bull. Torr. Club 65: 286 (1938).
Portland: shaded shallow water, Blue Hole, Wright, May 1906 (D,
F, N, S). Also to be referred here is the specimen from Kingston:
on stones, Drunkenmans Cay, Howe 1+701, Dec. 1906 (N).

Oscillatoria princeps Vauch. ex Gom. Ann. Sci. Nat. VII Bot.
16: 206 (1892). O. princeps f. purpurea Coll, in Coll. Hold. &
Setch. Phyc. Bor.-amer. 16: 753 (1900). O. obtusa Gardn. Mem.
N. Y. Bot. Gard. 7: 38 (1927). Lyngbya gigantea Lew. Zirk. &
Patr. Journ. Mitch. Sci. Soc. 1933: 221 (1933). — In quiet fresh
water. Specimens recorded in Collins’ list as both Oscillatoria princeps
and f. purpurea are included here. ST. thomas: Bath, Pease &
Butler, July 1900 (type of O. princeps f. purpurea, N; isotypes in
Phyc. Bor.-amer. 753, D, FM, N, T, U). ST. ann: in stream, St.
Anns Bay, Humphrey 315, 315a, Mar. 1893 (F, G, N).

Oscillatoria proboscidea Gom. ibid. 16: 209 (1892). O. re-
fringens Gardn. Mem. N. Y. Bot. Gard. 7: 38 (1927). — In quiet
fresh water. The specimens cited here are those of Collins’ list.
ST. mary: in pool by Wag Water river, Castleton, Humphrey 1+01,
Apr. 1893 (C, G, N); in stream from reservoir, Castleton, Humphrey
1+08, Apr. 1893 (C, FM, G, N).

Oscillatoria Bonnemaisonii Crouan ex Gom. ibid. 16: 215
(1892).— In brackish and almost marine water. Kingston : Drunken-
mans Cay, Howe 1+712, Dec. 1906 (D, N).

Oscillatoria tenuis Ag. ex Gom. ibid. 16: 220 (1892). — In
freshwater. The one specimen is that listed by Collins. ST. thomas:
Bath, Pease & Butler, 1900 (N).

Oscillatoria Formosa Bory ex Gom. ibid. 16: 230 (1892). —
In fresh water. The specimens reported as O. formosa and O. an-
guina in Collins’ list are treated here. ST. mary: in spring pool,
Castleton, Humphrey, Apr. 1893 (G). ST. ann: in still pool below
fall, Roaring river, Humphrey 326, 326a, Mar. 1893 (C, F, G, N).
Jamaica: Humphrey (D), 1+12 (N).

122 Field Museum of Natural History — Botany, Vol. 20

Spirulina tenerrima Kutz. ex Gom. ibid. 16: 252 (1892).
S. socialis Gardn.1 N. Y. Acad. Sci. Sci. Surv. Porto Rico 8: 272
(1932). — In brackish and marine waters. ST. ann: with Microcoleus
chthonoplastes , Runaway bay, Orcutt 6127 , 1927-28 (T). hanover:
with Hydrocoleum floccosum on rocks near Sandy bay, Howe 1/.975,
Jan. 1907 (D).

1 The type of S. socialis in the New York Botanical Garden (Puerto rico:
Santurce, Howe 2162a, May 1903) appears to contain only typical S. tenerrima.