172 Trees with Simple Leaves. [ci 



or three fourths of an inch in thickness ; drooping 

 at the ends of the branchlets ; long oval or cylinder- 

 shape ; pale green when young, becoming brownish 

 as they ripen. Scales, broad reverse egg-shape, with 

 an entire edge, and rounded or somewhat two-lobed 

 at the apex. 



Found, in Maine, Northeastern Vermont, Northern Michi- 

 gan, Minnesota, and far northward, on low ground 

 and in swamps. It is most common north of the 

 United States boundaries. 



An evergreen tree, forty to seventy feet high. One 

 of the most important of the Northern timber trees. 



Fig. 88. Norway Spruce. [P. excelsa] 



This spruce is not a native, but is now very widely 

 cultivated, and is sometimes found escaped from cultiva- 

 tion. It is a finer and larger tree than the native spruces, 

 and differs from them especially in these items : 



Cones, five inches and more in length ; about one and a 

 half inches in thickness. 



Branches and branchlets, heavily drooping, especially in 

 the older trees. 



Genus TSUGA, Carr. (Hemlock.) 



Fig. 89. Hemlock. T. Canadensis ( L.), Carr. Abies Canadensis, 



Michx. 



Leaves, SIMPLE ; INDETERMINATE in position because of 

 their closeness ; arranged singly in two flat distinctly 

 opposite ranks up and down the branchlets. 



Leaf, one half inch long, narrow ; blunt ; sometimes 

 minutely toothed toward the apex ; flat ; green 

 above ; silvery white beneath. 



