Feb., 1919] New Oedogoniacece 241 



Oedogonium Pisanum gracilis nov. var. 

 Var. omnibus partibus gracilior; ceterum ut in typo. 



Dioecious, macrandrous ; oogonia single, rarely 2, elliptical to 

 elliptical-ovate, operculate, division superior; oospore elliptical nearly 

 filling the oogonium, outer wall smooth; male filaments somewhat 

 smaller than the female; antheridia 1-4 celled; sperms two, division 

 horizontal; basal cell elongated; terminal cell hairlike; 



Diam. cells of female plant G- 9, length 18-48 



" cells of male plant 5- 8, " 16-45 



" oogonia 16-20 " 20-30 



" oospores 13-18, " 18-28 



" antheridia 5- 7, " 5-10 



Somewhat smaller than the species in all dimensions, 

 otherwise similar to the type. 



Collected at Gates' pond, CofiEeen, Illinois, May, 1914. 

 Type in herbarium. E. N. T. Coll. No. 2420. 



Bulbochaete Bullardi nov. sp. 



B. dioica, nannandria, idioandrospora; cellulis vegetativis, diametro 2-8-plo 

 longioribus; oogoniis ellipsoideis vel ovoideo-ellipsoideis, erectis, sub setis longis 

 terminalibus, poro supramediano apertis, evidenter; oopsoris ellipsoideis, oogonia 

 complentibus vel non complentibus; costis episporii dentatis, dentibus inter se 

 costis transversalibus, evidentibus conjunctis; costis longitudinalibus irregulariter 

 inter se anastomosantibus; 1-6 cellularibus; nannandribus paullulum curvatis, in 

 oogonis vel cellulis suflFultoriis vel cellulis vegetativis sedentibus; antheridio 

 exteriore, 1-3-cellulari; 



Crassit. cell, veget. 20-32, altit. 60-165 



" oogon. 56-66, " 70- 96 



" cell, androsp. 18-21, " 1.5- 33 



" stip. nannandr. 18-21, " 30- 33 



" cell, antherid. 9-14. " 6- 10 



Dioecious, nannandrous, idioandrosporous ; vegetative cells 2-8 

 diameters long; oogonia ovoid-ellipsoid or ellipsoid, erect, terminated 

 by a long seta, pore evident and supramedian ; oospore filling or nearly 

 filling the oogonium and of the same form, ribs of outer wall dentate, 

 the teeth connected by transverse lines, longitudinal ribs uniting 

 irregularly, androsporangia 1-6-celled; dwarf males slightly curved 

 resting on the oogonia, suffultory cells, or the vegetative cells; 

 antheridium exterior, 1-3-celled; 



Diam. veg. cells 20-32, 



" oogonia 56-66, 



" androsporangia 18-21, 



" stipe dwarf male 18-21, 



" antheridia 9-14, 



