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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