73 
>. 
| AS Foe ulus tremuloides 
isa ea ALA \ GA \ MILES 
X ie / A / wu U 4UU 
} am Sheeashan 
ee ON 
: ns > a 
\ 
Map 69 
POPULUS TREMULOIDES MICHAUX ASPEN 
(Distribution of aspen is shown as one species, although dendrologists separate Populus tremuloides Michaux from Populus tremuloides aurea (‘Tidestrom) 
Daniels, the latter extending westward from Saskatchewan to the valley of the Yukon River and southward in the western part of the United States and 
Mexico.) 
