80 College of Forestry 
the empty portion of the parent hyphze, and are able to with- 
stand adverse conditions for a considerable period. Their 
germination was not followed. No chlamydospores were 
observed upon the primary mycelium, all those observed 
occurring upon the secondary type of mycelum. Oidia and 
chlamydospores were the only secondary spore forms encoun- 
tered in the cultures of Polyporus pargamenus and it is 
believed that the occurrence of these additional spore forms 
in connection with the life history of this plant is reported 
for the first time. 
In a number of cultures coiled or helicoid hyphal forma- 
tions were of common occurrence. They were observed both 
ric. 4. 
Helicoid hyphal formation from agar plate culture of Polyporus 
pargamenus, X 1,000. 
