396 



DISEASES OF CULTIVATED PLANTS 



Wholly resupinate, or most frequently reflexed, the free 

 portion projecting from the matrix, often crisped and lobed, 

 coarsely fibrous above, dingy ochraceous ; hymenium smooth, 

 bright ochraceous ; spores elliptical, hyaline. 



It is difficult to suggest preventive measures against a 

 fungus present practically everywhere. When growing on a 



FIG. 123. Stereum hirsutum. i, fungus ; 2, section of 

 same ; 3, basidia bearing spores, highly mag. 



living tree it should be cut away, and the wound coated with 

 gas-tar. 



Hartig, Die Zersetz. des Holzes, p. 129. 

 Ward, Trans. Roy. Soc., 189, p. 123 (1898). 



Partridge wood (Stereum frustulosum^ Fries.) is often a 

 pure saprophyte ; on the other hand, under certain conditions 

 it assumes the nature of a destructive parasite, attacking 

 various forest trees, more especially the oak. Dr. Hartig has 



