tions when viewed under oil immersion magnification (H. K. Phinney 

 manuscript ) . 



Entangled about reeds and in shallow water of beach pools; 

 common in acid habitats and Sphagnum bogs. Mich., Wis. 



Mougeotia cijanea Transeau 1926, p. 321 



Vegetative cells 14-18- (20)^ in diameter; chloroplast one-third 



to one-half the cell in length. Zygospores formed in the tube, not 



dividing the gametangia; compressed-globose; at right angles to 



the tube; wall blue, finely punctate; 30-40/x in diameter, 38-48/x long. 



Douglas Lake, Michigan. 



Mougeotia elegantula Wittrock 1872, p. 40 

 PI. 70, Figs. 7, 8 

 Filaments very slender, becoming geniculate in conjugation; cells 

 long-cylindric, 4-4.5/t in diameter, 50-135/^ long; chloroplast a thin 

 plate, not quite equalling the cell in length, containing 4-8 pyre- 

 noids. Zygospores formed in the tube and dividing both gametangia; 

 quadrate with concave margins, the wall smooth, hyaline; 18-25/u, 

 in diameter. 



Forming cottony masses in shallow water. Mich., Wis. 



Mougeotia floridana Transeau in 

 Transeau, Tiffany, Taft, & Li 1934, p. 224 

 Vegetative cells 14-20/x in diameter, 60-200/i, long; chloroplast 

 with 6-8 pyrenoids in 1 series. Zygospores formed in the tube and 

 extending into one gametangium; globose or triangular; the median 

 wall yellow and smooth; 30-40/x in diameter, 36-48/^ in long 

 dimension. 

 Mich. 



Mougeotia genuflexa (Dillw.) C. A. Agardh 1824, p. 83 



PI. 70, Figs. 9, 10 



Filaments slender, frequently conjugated by geniculations but 

 not producing zygospores; cells 25-38/t in diameter, 50-100-(225)/x 

 long; chloroplast a broad band filling the length of the cell, with 

 several pyrenoids. Zygospores formed either by lateral or (more 

 rarely) scalariform conjugation, within the tube, not dividing the 

 gametangia; quadrately-ovate or subglobose; median wall smooth 

 and hyaline; 30-35-(40))u, in diameter. 



Among beds of vegetation in lagoons and lakes; rather common 

 in Sphagnum bogs, growing luxuriantly in shaded habitats. Mich., 

 Wis. 



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