Mougeotia genuflexa var. gracilis Reinsch 1867, p. 215 

 Smaller than the typical; vegetative cells 15-24/1, in diameter; 

 zygospores 24-30/i, in diameter. 

 Mich. 



Mougeotia gracilima ( Hass. ) Wittrock 1872, p. 40 

 Vegetative cells 5-7|ii in diameter, 55-140/x long. Zygospores 

 dividing both gametangia; quadrate with concave margins to retuse 

 angles, the wall finely verrucose; 20-25/a in diameter, 20-28/x long. 

 Mich. 



Mougeotia Hirnii Transeau in 

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

 Vegetative cells 25-28ju, in diameter, 60-140/i, long. Zygospores 

 formed in the tube, not dividing the gametangia; ovate; the median 

 spore wall smooth, yellow to brown; 40— 48/i, in diameter, 43— 50/x 

 long. 

 Mich. 



Mougeotia laetevirens ( A. Braun ) Wittrock in Wittrock 



& Nordstedt 1877, Algae Exsic. No. 58 



PI. 70, Figs. 11-14 



Filaments forming light green, cottony growth; cells long-cylindric; 



(22)-27-40/x in diameter, up to 350/x long; chloroplast a broad band 



extending the full length of the cell, containing an indefinite number 



of irregularly arranged pyrenoids. Zygospores formed by scalariform 



conjugation in the tube, not dividing the gametangia; cylindric or 



ovate in front view, with lateral walls convex, free walls concave; 



median wall smooth and brown; 36-50/a in diameter, 45-73/x long. 



Mich., Wis. 



Mougeotia laevis (Kuetz. ) Archer 1866, p. 272 

 [Debarya laevis ( Kuetz. ) West & West] 

 PI. 70, Figs. 1, 2 

 Vegetative cells elongate-cylindric, 20-26/a in diameter, up to 5 

 times the diameter in length; chloroplast with 2-4 pyrenoids. 

 Zygospores formed in the conjugation tube, not dividing the game- 

 tangia; ovate to broadly ellipsoid; outer wall smooth, median wall 

 coarsely scrobiculate; 20-30- ( 36 )/7, in diameter, 42-50|a long. 

 Shallow water of ponds and ditches. Mich., Wis. 



Mougeotia maltae Skuja 1926, p. Ill 

 Vegetative cells 17-22/x in diameter, up to 160/i, long; chloroplast 

 with a single row of 4-8 pyrenoids. Zygospores formed in the tube, 



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