332 



Edwin F. Hopkins 



Morphology 



The mycelium shows no peculiar characteristics. It varies in diameter, 

 depending on the conditions under which it lives. The branches are not 



constricted where they join 

 the parent hypha. Anasto- 

 mosing is frequent (fig. 31). 

 The conidi- 

 ophores, 

 when ma- 

 ture, are 

 deep brown 

 in color ex- 

 cept near 

 the base, 

 where they 

 are hyaline. 

 They are 

 indetermi- 

 n a t e in 

 length, for 

 under fa- 

 vorable 

 conditions, after 

 forming one head A conidiophore 

 of conidia termi- ^rT'lster/rf 

 nally, the main axis conidia due to pro- 



mav nrnlifpritp liferation > and the 

 may proinerate twisting of the stalk 



and form another when dry, are both 



head (fig. 50). This S'^Jg^ 



may be repeated 



until finally there are several clus- 

 ters of conidia on a single conidio- 

 phore (fig. 32). It should be remem- 



FlG. 33. SWOLLEN BASES OF CONIDIOPHORES Del ' ed that although SOUie of tllCSe 



of botrytis tulipae. x 600 clusters appear to be lateral, they 



(Camera-lucida drawing) are really formed terminally. When 



Fig. 31. mycelium of botrytis tulipae. X 600 



Type of branching and anastomosing of the hyphae 

 (Camera-lucida drawing) 



Fig. 32. conidio- 

 phore of botrytis 

 tulipae. x 67 



