KEY TO GENERA AND SPECIES 



fringes on trunks and branches ranging in 

 size from 2 to 8 inches, or more, in diameter. 

 Leaves more or less rhombic, occasionally 



Fig. 

 Cut-leaved 

 Birch. 



ig. 



Gray 



Birch. 



Fig. 128.* Gray Birch. 



Fig. 129. Cut-leaved Birch. 



somewhat triangular, almost never of a 

 regular egg-shaped outline. N. J. south- 



