Oedogonium carolinianum Tiffany 1934, p. 324 

 PL 33, Figs. 11, 12 



Macrandrous; monoecious. Vegetative cells cylindric, elongate; 

 (14)-17.5-19-(23)/x in diameter, (45)-117-(156)/x long. Oogonia 

 solitary; ellipsoid; opening by a superior pore; (54) -58- (63) /a in 

 diameter, (70)-78-(86)/x long. Oospores broadly ellipsoid; the outer 

 layer of the spore wall striated with longitudinal ribs, 22-28 in 

 number, sometimes spiral in our specimens; not filling the oogonia; 

 48.7-57^ in diameter, 58.5-69- ( 75 )/a long. Antheridia 12-16- ( 18 )/>t 

 in diameter, (7)-8-ll-(12);Lt long. 



Our plants agree closely with Oe. carolinianum, but the oospores 

 do not fill the oogonia as described for that species. 



In a Sphagnum bog pond. Wis. 



Oedogonium cryptoporum Wittrock 1871, p. 119 



Macrandrous; monoecious. Vegetative cells cyhndric, 7-10/x, in 

 diameter, 28-60)u, long. Oogonia solitary; subdepressed-ovoid-globose 

 or subdepressed-globose; opening by a median pore; 23-29/i, in 

 diameter, 25-31/i, long. Oospores subdepressed-globose; filhng the 

 oogonia; wall smooth; 20-27/x in diameter, 19-22|a long. Antheridia 

 6-8)u, in diameter, 7-1 l/x long. 



Mich. 



Oedogonium curtum Wittrock 1871, p. 121 



Macrandrous; monoecious. Vegetative cells cyhndric, with spirally 

 arranged punctations; 12-22/* in diameter, 25-1 10/a long. Suffultory 

 cell sometimes enlarged. Oogonia 1-4; obovoid-globose; opening by 

 a superior pore; 38-55/x, in diameter, 37-54ju, long. Oospores obovoid- 

 globose; nearly filling the oogonia; wall smooth; 36-52/1, in diameter, 

 35-51/1 long. Antheridia 10-17/* in diameter, 8-13/* long. 



Mich. 



Oedogonium fennicum (TifiF. ) Tiffany 1934, p. 324 

 PI. 32, Fig. 12 



Macrandrous; monoecious. Vegetative cells cylindric, (14.8)-17- 

 18-(19)/x in diameter, (44) -50-70- (120)/* long. Oogonia solitary; 

 obovate-globose; opening by a superior pore; 38.8-42-(46)/x in 

 diameter, (40.7) -42-48- (60)/* long. Oospores subglobose; not quite 

 filling the oogonia; wall smooth; 33-35-(40)/<, in diameter, 35-37- 

 (40)/* long. Antheridia of 1-4 cells, 12-18/^ in diameter, 6-7-(8)/* long. 



Attached to grass in a roadside fosse. Wis. 



[177] 



