8 



THE CONIFERS OF THE NORTHERN ROCKIES. 



The forests of the northern Rocky Mountain region contain 5 or 6 

 species of pine, 1 of spruce, 2 of larch, 2 hemlocks, 1 Douglas spruce, 



FIG. 2. Mature Western Yellow Pine, with undergrowth mainly of Douglas Spruce. Bot- 

 tom lands of Lolo Valley, Montana. 



2 firs, 1 arbor vitse, 4 junipers, and 1 yew. Among the hardwoods 

 are 5 cottonwoods or poplars, 30 willows (of which only 7 or 8 are 



