CHYTRIDIACEAE 1 1 



(a) Sporangium straight, rounded above 



Pcdochytrium S. 77 



(b) Sporangium curved, pointed above 



Harpochytrium 11: 249, S. 77 

 (2) Saprophytic; stalk not separated from sporangium 



Obelidium 7: 299, S. 77 

 b. Sporangia with swollen basal cell 



(1) Sporangium and basal cell endophytic 



Diplophlyctis S. 78 



(2) Sporangium epiphytic or free 



(a) Sporangium epiphytic 



x. Zoospores escaping singly Phlyctochytrium S. '78 



y. Zoospores escaping in a ball Rhizidiomyces 7: 316, S. 79 



(b) Sporangia saprophytic, free Rhizidium 7: 296, S. 79 



II. Zoosporangia opening by a lid, epiphytic; resting sporangia endophytic, mycelium 

 tubular or saccate Chytridium 7: 304, S. 80 



Subfamily Cladochytriae 



SCHROETER 8o 



Mycelium diffuse, repeatedly branched, saprophytic, intercellular or intracellular, 

 forming many sporangia, delicate, disappearing by the maturity of the spores ; spo- 

 rangia intercalary or terminal, zoospores i-ciliate ; resting sporangia produced asexu- 

 ally. 



I. Resting sporangia alone present Physoderma 7: 317, S. 81 



II. Zoosporangia alone present 



1. Endophytic, intracellular Cladochytrium 7: 295, S. 81 



2. Free, in algal slime 



a. Sporangia opening by a hole Amoebochytrium 7: 315, S. 82 



b. Sporangia opening by a lid Nowakowskiella 17: 514, S. 82 



Subfamily Harpochytriae 



SCHROETER 83 



Mycelium strongly developed, cylindric, persistent; sporangia alone known, 

 formed asexually. 



I. Mycelium and sporangia in the host-cell Catenaria 9: 360, S. 83 



II. Sporangia in part at least free 



1. Parasitic 



a. Mycelium endophytic Harpochytrium 11: 249, S. 84 



b. Mycelium endozoic Polyrrhina 7: 314, S. 84 



2. Saprophytic Tetrachytrium 7: 295, S. 84 



Subfamily Oochytriae 



SCHROETER 84 



Mycelium lacking or variously developed ; resting sporangium formed by the 

 union of two young fruit-bodies, in which the plasm of one passes into the other 

 which develops as an oogone; zoosporangia present, spherical to elongate. 



I. Mycelium entirely lacking Diplophysa 7: 302, S. 85 



II. Mycelium present 



