466 



FUNGOUS DISEASES OF PLANTS 



Fig. 232. Fomzs applanatus on Hard Maple: Small Specimens 

 (Photograph by Geo. F, Atkinson) 



trees. In the moist forest it is often difficult to find a beech 

 tree (Fagus grandifolia) ten inches or more in diameter which is 

 not seriously affected. The fungus is also destructive to hard 

 maple {Acer sacckarum), yellow birch {Betula luted), aspen {Popu- 

 lus tremuloides), and certain oaks (Quercus spp.) in their ranges. 



