Oedogonium hispidum Nordstedt in Wittrock 1871, p. 128 



PI. 24, Fig. 4 

 Nannandrous; gynandrosporous. Vegetative cells cylindric, 9-14ju, 

 in diameter, 36-130/x long. Oogonia solitary; terminal; subellipsoid 

 or ellipsoid-globose; opening by an inferior pore; 35-44/a in diameter, 

 42-56/x long. Oospores globose to globose-ellipsoid; not filling the 

 oogonia; outer wall spiny; 32-39/x in diameter, 32-40/a long. An- 

 theridia 5-6/^ in diameter, 7-9/i. long. 

 Mich. 



Oedogonium multisporum Wood 1869, p. 141 



Nannandrous; gynandrosporous or idioandrosporous. Described in 

 previous section. 



Oedogonium Sawyerii Pruscott 1944, p. 354 

 PL 39, Fig. 1 



Nannandrous; gynandrosporous. Vegetative cells cylindric, stout; 

 30-33.3;a in diameter, 66.6-81/x long. Oogonia solitary; nearly glo- 

 bose; 63-66.6/x in diameter, 55-60/i, long; opening by a superior 

 pore. Suffultory cell swollen. Oospores globose; outer membrane 

 with a prominent spiral ridge, continuous from pole to pole, the 

 axis of the spore turned at an angle of about 30 degrees from the 

 longitudinal axis of the oogonium; 50-55/^ in diameter (including 

 ridge). Male plants on the su£Fultory cell. Antheridia 8-10/a in 

 diameter; androsporangia 25.9/a in diameter, 14.8/x long. 



This species should be compared with the smaller and idioandro- 

 sporous Oe. latviense (Tiff.) Tiffany and with Oe. spiripennatum 

 Jao, which has a median pore. 



In a beach pool cut off from a soft water lake. Wis. 



Oedogonium sexangulare Cleve in Wittrock 1871, p. 131 



PI. 39, Figs. 2, 3 



Nannandrous; gynandrosporous. Vegetative cells cylindric, (9)- 

 16-20- ( 22.6 )/x in diameter, (33)-39-57-(78)/x long. Oogonia soli- 

 tary; sexangular-ellipsoid; opening by a median pore; 29-33- ( 40 )/i, 

 in diameter, (33)-34-39|U long. Oospores the same shape as the 

 oogonia and filling them; wall smooth; (27)-31/a in diameter, 

 (31) -36-38.7- (40)^ long. Dwarf male plants on the suffultory cell. 

 Antheridia exterior, 6-8/i, in diameter, 9-12/a long. Suffultory cell 

 somewhat larger than the vegetative cells. 



In a lily pond and in acid swamps. Mich., Wis. 



Oedogonium stellatum Wittrock 1871, p. 129 

 Nannandrous; gynandrosporous. Vegetative cells cylindric, 15-35/x 

 in diameter, 40-225/x long. Oogonia 1-3; obovoid-globose; opening 



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