FUNGI, SAC FUNGI 



293 



Fig. 240. 



Plowrightia morbosa, showing details of the fungus which causes the galls. A, section 

 through the velvety stroma, showing conidia bearing stroma. B, conidiophores and conidia 

 still more enlarged. C, a single perithecium containing asci and paraphyses. D, paraphyses 

 and asci containing spores still more enlarged. , ascospores, one germinating. (After Farlow.) 



Fig. 241. 



Plum rot (Sclcrotina fructigena), showing the conidial stage (Monilia fructigena) of the 

 fungus, on the surface of the plum, which causes the rot. Natural size. 



