42 



EVERGREENS OF COLORADO 



Fig. 28. Douglas Fir. a. Twig showing needle scars, b. Cross-section 

 of needle, xlO. e. Twig with buds and needles, x2. 



old specimens, occasionally is found considerably branched, or even 

 divided toward the base. It usually tapers rapidly upward, so that trunks 

 of clear length are not easily found. The bark in old age becomes 

 divided into narrow, flat ridges one-half inch thick, with a light grey 

 color upon the surface and reddish or brownish beneath. The wood is 

 fine-grained, firm, with whitish sapwood and reddish heartwood, which 



