44 



THE CONIFERS OF THE NORTHERN ROCKIES. 



The greenish, seed-bearing flowers appear erect on the young 

 branches early in the spring, and the yellow pollen flowers appear 

 near by in the axils of the leaves. The cones are matured in one 



FIG. 26. Grand Fir. In young trees the bark is smooth, but it grows rougher with age. 



season. The bark of the tree becomes rougher with age, furrowed by 

 long intersecting grooves. In its internal structure the bark reveals 

 yellow streaks alternating with red or brownish ground tissue that 

 may also serve as a mark of identification. 



