Oedogonium spiralidens Jao 1934, p. 84 

 PL 40, Fig. 1 



Nannandrous; gynandrosporous or idioandrosporous. Vegetative 

 cells cylindric, (12) -14-16- (18)^ in diameter, (50)-55-76-(85)/x 

 long. Suffultory cell enlarged, 22.5^ in diameter, 70.3ju, long. Oogonia 

 solitary; globose or obovoid; opening by a median pore; (42)-44- 

 46-(50)/x in diameter, (40) -48- (50)/* long. Oospores nearly globose, 

 with long axis transverse to long axis of oogonium; outer spore 

 wall with 4-7 spiral costae, irregularly toothed at the edges, the 

 costae meeting at the poles; wall also marked with coarse granula- 

 tions or crystalline deposits; 41-50/* in diameter, 41-47/x long. Dwarf 

 male plants 2- or 4-celled; on the suffultory cell; 10-12-(13)/i in 

 diameter, 62.9/i, long. Antheridia exterior; 6-7.8-(8)/j, in diameter, 

 (8)-ll-12/xlong. 



Attached to reeds in lakes. Wis. 



Oedogonium striatum TijBFany 1934, p. 326 

 PI. 39, Fig. 10 



Nannandrous; gynandrosporous or idioandrosporous. Vegetative 

 cells cylindric or slightly capitellate, (18)-30-36/a in diameter, 

 (53)-76-250/A long. Oogonia 1-8- (10); subovate or elhpsoid; 

 opening by a superior pore; (67) -76-80/* in diameter, 79-83- (92)/* 

 long. Oospores the same fonn as the oogonia; the outer layer of 

 the spore wall with about 40 longitudinal, anastomosing ribs; 

 64-72- ( 76 )/t in diameter, 74-76- ( 90 )/i long. Dwarf male plants 

 on the much enlarged suffultory cell. Antheridia exterior; (12)-13.3- 

 14/i, in diameter, 9.5-12/* long. Suffultory cell 57-68.4/* in diameter, 

 117/* long. 



In a small northern lake among sand hills. Wis. 



Oedogonium Wolleanum Wittrock 1878, p. 137 

 PI. 35, Figs. 12, 13 



Nannandrous; gynandrosporous or idioandrosporous. Vegetative 

 cells long, cylindric; (21) -25-30/* in diameter, (65) -70-1 80- (235)/* 

 long. Oogonia 1-4, ellipsoid or subquadrangular; opening by a 

 superior pore; 58-65- (68)/* in diameter, (65) -69-80- (89)/* long. 

 Oospores filling the oogonia and of the same shape; the outer layer 

 of the spore wall furnished with 25 or more ribs with entire margins; 

 (56) -58-65- (66)/* in diameter, 65-80.5- (83)/* long. Dwarf male 

 plants, usually several, on the suffultory cell; 2- or 4-celled. Anther- 

 idia exterior; (9)-10-12-(14)/* in diameter, (7)-8-10-(ll)/i long. 

 Suffultory cell much enlarged, (45) -48-53- (65)/* in diameter. 



In a small northern lake among sand hills. Wis. 



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