412 Agricdltukal Expekimknt Station, Ithaca, N. Y. 



becomes greater at tlie center of each, group of mycelium, [n a 

 few days spore production seems to cease and tlien long, sterile 

 mycelial thi'eads grow out to a considerable distance. 



At tlie same time there are usually deveh)pe<l buds or gemiutu\ 

 at the ends of certain threads. These are colorless at fii-st and 

 may be deteot-ed by their irregularly oval outline, and greater 



diameter than the parent thread. Tliey soon acquire a dark-brown 

 color, sometimes become septate, oi' bud into rudimentary scler- 

 otia. One of these develoi)ed quite eai'ly in tlie culture is shown 

 at X, Fig. 3. 



Spores were also so^n on st-eiillzed bean stems. The fungus 

 grew readily and prmluced nuuK^^ous sjyores during a few days 

 when the threads assumed a dark-bi'own color and grew in great 



