Download PDF

SPIROGYRA 183
PI. 8, Figs. 87-88. Amer. Jour. Bot. 23, p. 58, Figs. 25-26.
1936.
Vegetative cells 38-581". x 112-256^1., with plane end walls; 3 to 4
chromatophores, making i to 3.5 turns; conjugation scalariform; tubes
formed by both gametangia; fertile cells cyHndric; zygospores ellipsoid
to cylindric-ellipsoid, with more or less rounded ends, 43-54 ;" x 64-102^1;
median spore wall of 2 layers; outer, brown and densely wrinkled;
inner, brown, finely punctate, and at times finely and irregularly retic-
ulate. (PI. XXIX, Figs. 11-13.)
United States: Florida; Tennessee; Texas.
Puerto Rico; Brazil; China, Szechwan.
127. Spirogyra rhizobrachialis Jao 1935. Sinensia. 6, p. 599,
PI. 7, Figs. 81-83. Amer. Jour. Bot. 23, p. 57, Figs. 18-21.
1936.
Vegetative cells 40-45 /a x i 14-240 /x, with plane end walls; 3 to 5
chromatophores, making 1.5 to 2.5 turns; in some portions of the filament
each sterile cell produces a lateral rhizoid-shaped attachment with
a more or less lobed hapteron; conjugation scalariform; tubes formed
by both gametangia; fertile cells cylindric, sometimes shortened and en-
larged; zygospores ellipsoid with more or less rounded ends, 38-60/^ x
58-100 ju.; median spore wall yellow-brown, finely and irregularly retic-
ulate. (PI. XXIX, Figs. 14-16.)
United States: Wisconsin (Prescott Coll.).
China, Chungking, February, 1930.
128. Spirogyra paraguayensis Borge 1903. ArJ{. Bot. 1, p. 280.
Vegetative cells 41-45;". x 80-200 ;U., with plane end walls; 3 to 4
chromatophores, nearly straight, or making .5 turn; conjugation
scalariform; tubes formed by both gametangia; fertile cells cylindric,
shortened; zygospores ellipsoid, 37-42 fi x 58-65/^; median spore wall
irregularly corrugate, yellow-brown. (PL XXIX, Figs. 17-18.)
South America, Paraguay.
129. Spirogyra subreticulata Fritsch 1921. Trans. Roy. Soc. S.
Africa. 9, p. 48.
Vegetative cells 50-54 /-