(58 THE FLORA OF NEBRASKA. 



». BlIIiBOCHAETE Ac, Syn. Alg. XXIX. 1817. 



Thallus of articulate, branching filaments; articulations thickened upwards, 

 and bearing at or near the apex a long, slender, hyaline awn, which is 

 bulbous at the base; reproduction as in Oedogonium. 



Etymology: Greek po?.{3os, bulb, and x aLT >h hair. 



Bnlbochaete polyandra Cleve Wittr. Dis. Oedo. Suec, 140. 



Dioecious, idio-androsporous; oogones somewhat depressed-globose, beneath 

 a terminal awn or a vegetative cell; dissepiment of supporting cell 

 usually above the middle; epispore delicately crenulate, or nearly 

 smooth; androsporangia 4-10 celled; dwarf males seated on the oogones; 

 stipe curved; vegetative cells 15-20 p in diam., 3-6 times longer; oogone 

 35-48 p in diam.; dwarf males 8-9x20-23 p. 



In stagnant pools, Minden. 



Bnlbochaete mirabilis Wittr. Dis. Oedog. Suec. 187. 



Monoecious; oogone ellipsoid or oblong, spreading or more rarely erect, be- 

 neath a terminal awn or a vegetative cell; antherids 2-4 celled, subepigyn- 

 ous or scattered; vegetative cells 16-20 p wide, l}i-l% times as long; 

 oogones 25-35x45-56 p; antherids 10-12x7-9 p. 



In stagnant pools, Lincoln, Minden. PL XXII., Fig. 5. 



Bnlbochaete snbsimplex Wittr. Disp. Oedog. Suec, 142. 



Monoecious; oogones ellipsoid, spreading beneath the epigynous androspo- 

 rangia or terminal setae; dwarf males on or near the oogones; plants 

 erect, branches often imperfectly developed; vegetative cells, 15-16 p in 

 diam.; 1-1 % times as long; oogones 26-28x39-42 p; dwarf males 10x15 p. 



In lakes, Cherry county. 



