PLATE XXV J 



fpLACKIIERRV STEMS ( RuhiS pUcatus) WITH CALLS KESULTING FKOM 

 THE I'KKSENCE OF THE FUNGUS Conioi/lV^JJi >// FuckclH. THE CON- 

 DITION I'lltFULAKLV KNOWN AS " CANKER " 



