Download PDF

SPIROGYRA 209
iform; tubes formed by both gametangia; fertile cells shortened and
enlarged to 32 /t; zygospores ellipsoid, 28-31^0, x 42-62 /a; median spore
wall punctate to reticulate-punctate, brown. (PI. XXXVI, Fig. 21.)
water.
United States: Massachusetts, Wellfleet (BuUard Coll.).
Africa, Langenburg, Lake Nyassa.
In the original collection attached and forming long masses in flowing
222. Spirogyra dentireticulata Jao 1935. Sinensia. 6, p. 611,
PL 10, Figs. 1 14-15.
Vegetative cells i8-26;«. x 118-250^1, with rephcate end walls; i
chromatophore, making 2 to 7 turns; conjugation scalariform; tubes
formed by both gametangia; zygospores ellipsoid, 29-41/11 x 42-80 /.a;
median spore wall reticulate, with minute spines at the intersections of
the network, yellow at maturity. (PI. XXXVI, Figs. 17-18.)
United States: Tennessee, Rutherford County (Bold Coll.).
China, Szechwan, December and lanuary.
223. Spirogyra lambertiana Transeau 1934. Trans. Amer. Micros.
Soc. 53, p. 225, PL 21, Fig. 60.
Vegetative cells i^-'Tpix x 120-300 /a, with replicate end walls; i
chromatophore, making 3.5 to 7 turns in the cell; conjugation lateral
and scalariform; tubes formed by both gametangia; fertile cells fusi-
form, inflated to 58-65 (-78) ju,; zygospores ellipsoid, 34-43 /a x 72-90 /a;
median spore wall of 2 layers; outer, thin, yellow, wrinkled; inner,
thick, yellow, or yellow-brown, reticulate. (PL XXXVII, Fig. i.)
United States: Maine; Massachusetts.
India, Fyzabad, February, 1938.
See also Number 262.
224. Spirogyra microgranulata Jao 1935. Sinensia. 6, p. 612,
PL 10, Figs. 1 12-13.
Vegetative cells 16-19^'' x 154-420/A, with replicate end walls; i
chromatophore, making 4.5 to 8 turns in the cell, conjugation scalar-
iform; tubes formed by both gametangia; receptive gametangia en-
larged; zygospores ovoid, 24-36 /a x /J', 5 1-77 with a double colorless
outer wall, of which the inner layer is wrinkled; median wall granulate
to verrucose, yellow-brown at maturity. (PL XXXVII, Figs. 2-3.)
China, Szechwan.
225. Spirogyra laxistrata Jao 1935. Sinensia. 6, p. 611, PL 10,
Fig. III.
Vegetative cells 18-20/A x 112-147/A, with replicate end walls; i
chromatophore, making 2.5 to 4 turns; conjugation scalariform; tubes