128 CLASSIFICATION OF FUNGI 



2. At free end of each sterigma is formed an oval 

 body a spore or "gonidium" (d), which, when ripe, 

 is thrown off from the sterigma. Two or more gonidia 

 may be supported upon each sterigma. 



Penicillium (Fig. 79). Note the branching filaments 

 "mycelium" (a) (frequently containing globules). 



Note the asexual reproduction. 



1. A filament grows upward " goniodophore " (b) 

 and its apex divides up into several branches 

 "basidia" (c). 



2. At the apex of each basidium a flask-shaped cell, 

 " sterigma " (d) , appears. 



3. At the apex of each sterigma appears a row of 

 oval cells "spores" or "conidia" (e). These, when 

 ripe, are cast off from the sterigmata. 



Ascomycetae. Oidium (Fig. 80). (This family is 



FIG. So. Oidium. 



perhaps as nearly related to the blastomycetes as it is 

 to the hyphomycetes.) 



Note the branching filaments " pseudomycelium " 

 (a). Here and there filaments are broken up at their 

 ends into oval or rod-shaped segments, "oidia," and 

 behave as spores. 



Note the asexual reproduction. From the pseudo- 

 mycelium arise true hyphae (6), each of which in turn 

 ends in a chain of spores (c). 



