BULBOCHAETE. 101 



Diameter veg. cells, 12-15 yu ; less than diameter in length. 

 Diameter oogon. , 23-25 yw by 34-40 yu. 

 Diameter dwarf males, 11-12 yw by 15-18 yu, 

 Diameter sperm, cells, 7-8 by 7-8 yw. 



Not rare. 



Plate LXXXVII, fig. 4. a condition not infrequent. Have 

 not seen a typical plant. 



B. Dissepiment of supporting cells present. 



BULBOCHAETE INSIGNIS, Pringsh. 



Oogonia ellipsoid, patent or erect, seated beneath the an- 

 drosporangia or terminal setae ; epispore delicately trans- 

 versely striate ; androsporangia epigynous or scattered ; 

 dwarf males seated on or near the oogonia. 



Diameter veg. cells, 20-25 //; 2i-4J times longer. 

 Diameter oogon. , 46-60 yw by 70-100 yu. 

 Diameter androsp. cells, 16-20 yu by 20-25 yw. 

 Diameter dwarf male (stem), 17-19 yu by 29-31 yw. 

 Diameter sperm, cells, 10-11 yw by 7-8 yw. 



Hopatcong and other lakes, New Jersey. 

 Syn. B. S>m'o<m,Wittr. ; B. Pringsheimiana, Arch. 



Plate LXXXVIII, figs. 2, 3, branched filaments with 

 oogonia, dwarf males, etc. 



BULBOCHAETE MINOR, A. Br. 



Oogonia somewhat oblong ellipsoid, erect or rarely patent, 

 seated beneath terminal setae, androsporangia or vegetative 

 cells ; androsporangia epigynous or scattered ; dwarf males 

 located near an oogonium. 



Diameter veg. cells, 20--25 yu; li-3 times longer. 

 Diameter oogon., 33-42 yu by 60-69 yu. 

 Diameter androsp. cells, 14-16 yu by 17-21 yu. 

 Diameter dwarf males (stem), 13 yu by 22 yw. 

 Diameter sperm, cells, 6 yw by 7 yw. 



Ponds, New Jersey. 

 Plate LXXXVII, fig. 7, a branched filament in fruit. 



BULBOCHAETE SUBSIMPLEX, Wittr. 



Oogonia ellipsoid, patent, beneath the androsporangia or 

 terminal setae ; androsporangia epigynous ; dwarf males 

 seated near the oogonia or on them 5 plants erect, branches 

 often imperfectly developed. 



