Oedogonium australe (G.S. West) Tiffany 1934, p. 324 



PI 30, Figs. 1, 2 



Macrandrous; dioecious. Vegetative cells cylindrical, (12)-14-16/a 

 in diameter, (46)-56-78-(80)/i long. Oogonia solitary; globose or 

 subglobose; (39)-40-41-(43);u in diameter, {40)-42-4Six long; 

 opening by a median pore. Oospores globose; nearly filling the 

 oogonia; wall thick, the outer layer echinate; (31)-32-34/a in diam- 

 eter, 31-^4-(35)/A long. Antheridia 12-15/* in diameter, 15-16/x long. 



This species should be compared with Oe. suecicum, which is 

 smaller throughout but has some morphological similarities. 



In a roadside fosse, and in a ditch through a Sphagnum bog. 

 Mich., Wis. 



Oedogonium Boscii (Le CI.) Wittrock 1874, p. 34 

 PI. 30, Figs. 5, 6 



Macrandrous; dioecious. Vegetative cells cyhndric, (14)-16-17- 

 (23)/x, in diameter, (45)-129-148/[i long. Oogonia solitary; ellipsoid 

 or subcylindrical-ellipsoid; opening by a superior pore; (39)-51-52/x 

 in diameter, (75)-93-9&-(110)jit long. Oospores ellipsoid; not filling 

 the oogonia; the outer and middle layers of the spore wall with 

 22-28- (35) longitudinal ribs (not anastomosing in our speci- 

 mens); (36)-43-46/x in diameter, (56) -59-70/1 long. Antheridia 

 (not observed in our collections) 13-14/i, in diameter, 6-16/x long. 



In a small pond. Wis. 



Oedogonium capillare ( L. ) Kuetzing 1843, p. 255 

 PI. 43, Figs. 13, 14 

 Macrandrous; dioecious. Vegetative cells cylindric, 35-56/i in 

 diameter, 36-120/x. long. Oogonia solitary; cyhndric; not much 

 gieater in diameter than the vegetative cells; opening by a superior 

 pore; 40-60/A in diameter, 45-75/t long. Oospores globose to ovoid, 

 or cyHndric-globose; wall smooth; 30-52/* in diameter, 35-65/i. long. 

 Antheridia 30-48/* in diameter, 5-10/* long. 

 Mich. 



Oedogonium capilliforme Kuetzing 1853, Tab. Phyc, p. 12; 



Wittrock 1872, p. 21 

 PL 44, Figs. 7, 8 

 Macrandrous; dioecious. Vegetative cells cylindric, usually elon- 

 gate; 28-^2- ( 38 )/t in diameter, (42) -45-96- (120)/* long. Oogonia 

 sohtary; obovoid; opening by a superior pore; (42) -43-48- (50)/* in 

 diameter, (51) -52-58- (62)/* long. Oospores subglobose; not filling 



[167] 



