FUNGI: SAC FUNGI 



267 



Fig. 230. 



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

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



tissue of the fruit body or ascoma. 

 the most injurious (Scler- 

 otinia fructigena) causes 

 the common brown rot 

 of cherries, plums, 

 peaches, and sometimes 

 of apples also. The 

 asexual stage (Monilia) 

 causes the rot of the 

 fruit. The conidia are 

 borne in long chains. 

 The rotted peaches and 

 plums become dried and 

 " mummified," and many 

 hang on the trees for a 

 large part of the winter 

 and the following sum- 

 mer. They fall to the 



A few are parasitic. One of 



Fig. 231. 



c . Monilia fructigena, showing chains of conidia, also 



ground, and after paSS- showing how the conidia separate from each other in 



ing another winter, half the chains " Two conidia a 



