Misc. Pub. 303, U. S. Dept. of Agriculture PLATE 24 
Populus tremuloides: A, Tooth marks indicate that quaking aspen is sometimes used as food by elk. It is 
of prime importance to beaver. B, A characteristically thick grove of quaking aspen, a rapid-growing 
species of great importance as soil cover and wildlife food. (Photographs by Department of the Interior.) 
