Download PDF

SPIROGYRA i8i
is thin, brownish and wrinkled, the inner, brown, and irregularly retic-
ulate. (PI. XXIX, Figs. 1-2.)
China, Chungking, August, 1930.
118. Spirogyra orientalis W. & G. S. West 1907. Ann. Roy. Bot.
Gard., Calcutta. 6, p. 186.
Vegetative ceils 30-31 /^ x 90-1 60 /x, with plane end walls; 3 chro-
matophores, making i to 1.5 turns; conjugation scalariform; tubes
formed by both gametangia; fertile cells inflated, 57-65/^; zygospores
ellipsoid, more or less pointed, 38-42^1 x 61-67 /a; niedian spore wall
minutely scrobiculate, brown. (PI. XXIX, Fig. 3.)
United States: Michigan, Cheboygan County (Taft Coll.).
Burma; China, Yunnan (Li Coll.).
119. Spirogyra subcylindrospora Jao 1935. Sinensia. 6, p. 598,
PL 7, Figs. 79-80.
Vegetative cells 25-32 ju x 96-228 /a, with plane end walls; 2 to 3
(rarely 4) chromatophores, making i to 1.5 turns in the cell; conjuga-
tion scalariform; tubes formed by both gametangia; fertile cells cylin-
dric or enlarged; zygospores ellipsoid to cylindric-ellipsoid with
rounded ends, 32-38 ju. x 58-96 /x; median spore wall brown, thick, retic-
ulate. (PI. XXIX, Figs. 4-5.)
United States: Florida (Tiffany Coll.).
China, Szechwan.
120. Spirogyra castanacea G. C. Couch 1944. Ohio Jour. Set.
44, p. 277.
Vegetative cells 34-37 M x 100-173 /x, ^^^^ plane end walls; 2 to 3
chromatophores, making 2 to 3 turns in the cell; conjugation scalar-
iform; tubes formed by both gametangia; receptive cell inflated on both
sides; zygospores mostly broadly ellipsoid, rarely ovoid, 48-52 /x x
69-73 /x; median spore wall chestnut brown, strongly reticulate.
United States: Arkansas, Boston Mountain region.
121. Spirogyra mienningensis Li 1940. Bull. Fan Mem. Inst.
Biol., Botany. 10, p. 61.
Vegetative cells 42-48 p. x 102-208 m, with plane end walls; chromatophores
2 or 3, making 1-4 turns in the cell; conjugation scalar-
iform; tubes formed by both gametangia; fertile cells inflated up to
74 m; zygospores ellipsoid, 52-59 /a x 70-88 jU.; outer spore wall of 2 layers,
the outermost thin, smooth, transparent; the inner, thin and wrinkled;
median spore wall granulose to verrucose, yellow-brown at maturity.
(PI. XXIX, Fig. 6.)
China, Yiinnan, Mienning, December 10, 1938.