1905] WHITFORD—FORESTS OF FLATHEAD VALLEY 205 
on the prairie, a discussion of its sylvicultural habits will be deferred ~ 
until the meso-xerophytic forest is described. It is almost invariably 
; - —Three generations of forests in a “burn” near Ross Lake; first genera- 
tion represented by isolated old specimens of western larch; second generation con- 
sists of a forest of lodgepole pines mixed with a few individuals of western larch; in 
the foreground is the third generation, which consists almost entirely of young trees 
of lodgepole pines.—From photograph by PRAEGER. 
4 companion of western larch in the mesophytic area, hence the name 
Western larch-Douglas spruce association. 
