270 FAMILIAR TREES AND THEIR LEAVES. 



silvery blue-white below ; it is very flat, straight, 

 not curved, and has a very Hunt end. There is a 



Balsam Fir. 



groove in the center of the needle above, and a cor- 

 responding raised rib below. The branchlets are 

 flat, and the needles do not project from them in all 

 directions as they do on the spruce ; the little branch- 

 lets are also conventionally arranged at an angle of 

 45 with the larger ones. 



