not dividing the gametangia; globose; median spore wall blue and 

 smooth; S0S5-{40)fji. in diameter. 

 Mich. 



Mougeotia micropora Taft in 



Transeau, Tiffany, Taft, & Li 1934, p. 218 



PI. 74, Fig. 5 



Vegetative cells 18-23/* in diameter, 60-160/x long; chloroplast 

 with 4-6 pyrenoids in 1 series. Zygospores formed in the tube, not 

 dividing the gametangia; globose, ovate, or compressed, parallel 

 with the tube; median spore wall brown and punctate; 26-36(U. in 

 diameter, 26-30/x long; sporangium finally becoming inclosed by a 

 thick layer of pectose. 



Mich. 



Mougeotia nummuloides ( Hass. ) DeToni 1889, p. 713 



Vegetative cells 8-1 6/x. in diameter, 32-160^ long. Zygospores 

 formed in the tube, not dividing the gametangia; globose to ovate; 

 median spore wall brown and scrobiculate; 17-37;li in diameter. 



Mich, 



Mougeotia parvula Hassall 1843, p. 434 



Vegetative cells 6-12/i, in diameter, 30-140|U long; chloroplast % 

 the length of the cell, with 4-6 pyrenoids. Zygospores formed in 

 the tube, not dividing the gametangia; globose; median spore wall 

 brown and smooth; 13-24/x in diameter. 



Mich. 



Mougeotia pulchella Wittrock 1871, p. 88 



Vegetative cells 24-29/x in diameter, 48-150/x long; chloroplast 

 with pyrenoids in a single series. Zygospores formed in the tube, 

 not dividing the gametangia; ovate or ellipsoid, with flattened ends; 

 median spore wall brown and punctate; 28-35/x in diameter, 40-50/i, 

 long. 



Mich. 



Mougeotia punctata Wittrock 1867, p. 21 

 PL 71, Fig. 1 



Filaments forming sparse, cottony growths; cells short- or long- 

 cylindric, 8-lOjti in diameter, (50)-115-135|a long; chloroplast a 

 broad plate with 4-6 (or more ?) pyrenoids. Zygospores formed in 

 the tube and dividing both gametangia; quadrate with retuse 

 margins; outer spore wall coarsely punctate or pitted; (18)-29jii 

 in diameter, 30-33- ( 38 ) /x long. 



Among reeds in a small lake of soft water. Wis. 



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