GBDOGONIUM. 



B. Dwarf males bi-multicellular. 



Spermogonia external. 



2. Oospores with smooth membrane. 



a. Oospores globose or subglobose. 



Oe. inultispora, Wood. 

 Oe. flavescens, Hasts. 

 Oe. irregulare, Wittr. 

 Oe. Braunii, Pringsh. 

 Oe. Lundense, Wittr. 

 Oe. macraiidriuin, Wittr. 

 Oe. crassiusculum, Wittr. 



6. Oospores ellipsoid or egg-shaped. 



Oe. Borisianum, Led. 

 Oe. concatenatum, Hass. 

 Oe. sexangulare, Cleve. 

 Oe. Wolleanum, Wittr. 

 Oe. acrosporuni, D.By. 

 Oe. obtruncatum, Wittr. 

 Oe. ciliatum, Hass. 

 Oe. Huntii, Wood. 



3. Membrane of oospores echinulate. 



a. Oospores globose. 



Oe. stellatum, Wittr. 

 Oe. Donnellii, Wolle. 

 Oe. echinospermum, A. Br. 

 Oe. echinatum, Wood. 



b. Oospores ellipsoid. 







Oe. Hystrix, Wittr. 



SUBSECTION II. DIOECIOUS WITH ELONGATED MALE PLANTS; 



MACRANDROUS. 



c. Oogonia not, or scarcely swollen. 



Oe. capillare, Kg. 

 Oe. stagnale, Kg. 



d. Oogonia manifestly swollen. 



1. Oospores globose or subglobose. 



Oe. capilliforme, Kg. 



Oe. pachyandrium, Wittr. 



Oe. rufescens, Wittr. 



Oe. Franklinianum, Wittr. 



