Bill 

 (2 leaves) 



WESTERN ASPEN 



Po'pulus tremuloi'des au'rea, syns. P. au'rea, "P. tremuloi'des"* 



Leaves alternate, somewhat rounded 

 (suborbicular), broadest near the mid- 

 dle, mostly ?4 to 2'/ t in. wide, rounded 

 or heart-shaped at base, somewhat 

 shiny and deep yellow-green above, 

 paler beneath, turning golden or orange 

 after frost, somewhat irregularly round- 

 toothed on margins, short-sharp- 

 pointed at tip 



Leafstalks 

 flattened 



-about \}{ to 3 in. long, 



Twigs smooth and shiny, clear red- 

 dish brown at end of first year, becom- 

 ing pale reddish gray and finally a dull 

 gray 



Stems or trunks up to 90 ft. high 

 n nd 30 in. in diameter; bark -smooth, 

 grayish white, brownish green, pale, 

 green, or veined with greenish or 

 yellowish, areas, commonly covered 

 with a whitish powder, ridged and 

 furrowed only at base of trunk where, 

 in larger trees, it is blackish and may 

 be from.l to nearly 2 in. thick 



1 In part. 



