Download PDF
Download PDF
Download PDF
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
190<br />
ZYGNEMATACEAE<br />
154. Spirogyra sinensis Li 1933. Ohio Jour. Set. 33, p. 153, PI, i,<br />
Figs. 7-8.<br />
Vegetative cells 22-24/i. x 115-136/J., with plane end walls; 2 to 4<br />
chromatophores, making 2.5 to 4.5 turns; conjugation scalariform;<br />
tubes formed by both gametangia; fertile cells inflated toward the middle<br />
to about 50/t; zygospores lenticular, 3^-45/' in diameter; median<br />
spore wall smooth, brown. (PL XXXI, Fig. 10.)<br />
China, Hangchow.<br />
155. Spirogyra frankliniana Tiffany 1934. Trajis. Amer. Micros.<br />
Soc. 53, p. 225. Ohio Jour. Sci. 24, p. 65.<br />
Vegetative cells 32-36 /x x 80-120/1, with plane end walls; 3 to 4<br />
chromatophores, making i to 3 turns in the cell; conjugation scalariform;<br />
tubes formed by both gametangia; fertile cells inflated toward<br />
the middle; zygospores lenticular, 40-56/J. in diameter; median spore<br />
wall smooth, brown.<br />
United States: Ohio, Franklin County, Baumgartner's Lake.<br />
156. Spirogyra pellucida (Hassall) Kiitzing 1849. Species Algarum,<br />
p. 439. Hassall. History of British Freshwater<br />
Algae, p. 143, Pi. 25, Figs. 1-2.<br />
Vegetative cells 40-50 ju. x 100-400111, with plane end walls; 3 to 4<br />
chromatophores, straight, or making .5 to 4 turns; conjugation scalariform;<br />
tubes formed by both gametangia; i^ertile cells inflated toward<br />
the middle; zygospores lenticular, 77-86 /x in diameter; median spore<br />
wall smooth, brown. (PI. XXXI, Fig. 8.)<br />
United States: Iowa (Prescott Coll.),<br />
England; Finland; China.<br />
157. Spirogyra colligata Hodgetts 1920. Ann. Bot. 34, p. 523,<br />
PI. 22.<br />
Vegetative cells 29-40/1 x 240-640/1, with conspicuous collars between<br />
the cells; 4 to 6 chromatophores, usually 5, making .5 to 2.0 turns<br />
in the cell; conjugation scalariform, lateral, and terminal; tubes formed<br />
by both gametangia; fertile cells inflated at the middle up to 90-100/1;<br />
zygospores lenticular to lenticular-globose, 50-80 ( /i -90 ) in diameter;<br />
median spore wall verruculose, brown. (PI. XXXI, Figs. 11-13.)<br />
United States: Indiana, Laporte County (Britten Coll.), May 13, 1939.<br />
England.<br />
158. Spirogyra majuscula Kiitzing 1849. Species Algarum, p. 441.<br />
Vegetative cells 50-80/1 x 80-500/1, with plane end walls; (3-) 5 to<br />
8 chromatophores, straight or making .3 turn; conjugation scalariform<br />
and lateral; tubes formed by both gametangia; fertile cells shortened.