214 



THE LOWER FUNGI— PHYCOMYCETES 



species (Butler, 1913 h) also found on maize. The relation of 

 sporangial production to environmental conditions is interesting. 

 Sporangiophores develop only at night and protrude through 

 the stomates while the surface of the host is covered with dew. 

 Dispersal of sporangia also occurs at night, and seems to be 

 accomplished by forcible ejection from the sterigmata. 



A chart listing the known species of the genus and indicating 

 geographical distribution, host range, and other data is given by 

 Melhus, Van Haltern, and Bliss (1928: 304). 



Fig. 76. — Ba^idiophora eyitospora Roze & Cornu. (a) Sporangiophores 

 arising from stomate. (6) Oogonium with mature oospore, (c) Sporangium 

 liberating swarmspores. {After Cornu 1869.) 



2. Basidiophora Roze & Cornu [Ann. Sci. Nat. (ser. 5), 11 : 84, 

 1869]. 

 Mycelium intercellular; haustoria small and knob-like; spo- 

 rangiophore consisting of a cylindrical unbranched stalk termi- 

 nating in a clavate enlargement over the surface of which short,. 



