Download PDF
Download PDF
Download PDF
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
214<br />
ZYGNEMATACEAE<br />
2 chromatophores, making 3 to 9 turns; conjugation scalariform; tubes<br />
formed by both gametangia; fertile cells inflated up to 67 /x; zygospores<br />
ovoid to ovoid-globose, 40-57 /^ x 60-10^/1; outer spore wall of 2 layers,<br />
of which the inner is hyaline, scrobiculate; median spore wall yellowbrown,<br />
smooth. (PI. XXXVIII, Fig. 2.)<br />
United States: Illinois; Ohio; Maine.<br />
Latvia; Germany.<br />
241. Spirogyra tolosana Comere 1899. Bull. soc. hot. de ¥ranee.<br />
46, p. 168, PL 3, Figs. 1-3.<br />
Vegetative cells 28-30 ju. x 225-300 /a, with replicate end walls; 2<br />
chromatophores, making 3.5 to 4 turns; conjugation lateral; fertile cells<br />
cylindric or enlarged and shortened; zygospores cylindric-ovoid, with<br />
ends more or less truncate when filling the gametangium, 26-29 m x<br />
95-108 m; median wall yellow-brown, smooth. (PI. XXXVIII, Fig. 3.)<br />
United States: Indiana, Clay and Vigo Counties (Ben Smith Coll.).<br />
France, Toulouse.<br />
Approaches S. hassallii, differs in having smaller ovoid spores.<br />
242. Spirogyra hassallii (Jenner) Petit 1880. Les Spirogyres<br />
des environs de Paris, p. 13, PL 2, Figs. 6-8.<br />
Vegetative cells 26-33 ft ^ 100-250 /x, with replicate end walls; 2<br />
chromatophores, making 1.5 to 5 turns; conjugation lateral and scalar-<br />
iform; fertile cells fusiform, inflated to 50^1; tubes formed by both<br />
gametangia; zygospores ellipsoid, )«. 39-48 x 58-136 jn; median spore wall<br />
yellow, smooth. (PL XXXVIII, Fig. 4.)<br />
United States: Colorado; North Dakota; Iowa; Illinois; to the New<br />
England states.<br />
Widely distributed in Europe and eastern Asia.<br />
243. Spirogyra hartigii Kiitzing 1855. Tabulae phycologicae. 5,<br />
P- 33-<br />
Vegetative cells about 45 /x x 500-675/'., with replicate end walls; 2<br />
chromatophores, making 2 turns; conjugation lateral and scalariform;<br />
tubes formed by both gametangia, longer than usual; and in lateral<br />
conjugation the tube primordia arise 4 to 5/u. from the end walls; recep-<br />
tive gametangia enlarged or slightly inflated at the middle; zygospores<br />
ovoid, jti 45-50 x 80-105 /x; median spore wall smooth. (PI. XXXVIII,<br />
Figs. 5-
Change language