18 - MISC. CIRCULAR 31, U. S. DEPT. OF AGRICULTURE 
Sierra and in the Coast Range, from Lake County to Kern, it is in 
such small scattered groups that it is not of commercial value. 
Several books suitable for studying the cone bearers of California 
have been issued, including Trees of California, by Willis L. Jepson, 
and Western Forest Trees, by James B. Berry. Especially useful 
F 200620 
FIGURE 14.—Mountain hemlock (Tsuga mertensiana) 
for those not trained in botany is Forest Trees of the Pacific Slope, 
by the late George B. Sudworth, of the Forest Service, which can be 
obtained from the Superintendent of Documents, Government Print- 
ing Office, Washington, D. C., at 60 cents a copy. This is fully illus- 
trated and should be in every school and part of the outfit of every 
automobile that goes into the mountains. 
