420 DISEASES OF ECONOMIC PLANTS 



Heart rot (Fomes Everhartli Ell. & Galloway). — This 

 rot closely resembles that caused by Fumoi igniarius. 



Fia. 180. — Tree weakened by Fomes fomentarius. After Atkinson. 



Large, rusty-brown, woody sporophores, red-brown below, 

 grow from wounds and bear very small pores. 



