92 Trees zvitk Simple Leaves. [A n 



Fig. 48. — Balsam Poplar, Tacamahac. P. balsannfera, L. 

 Leaves, simple ; alternate ; edge finely and rather 



SHARPLY TOOTHED. 



Outline^ egg-shape. Apex, taper-pointed. Base, rounded. 



Leaf-stem, nearly smooth, the lower half rounded, the 

 upper part only slightly flattened. The leaf-buds in 

 the spring are large and yellow, and covered with a 

 fragrant gum (as, to some extent, are the buds of 

 most of the poplars). 



Leaf, four to six inches long ; when young, yellowish 

 above, becoming bright green ; whitish, and " net- 

 veined " below ; smooth. 



Found in Northern New England, Central Michigan, and 

 Minnesota, and far northward. 

 A tree sixty to seventy feet high, with very light and 



soft wood. 



Fig. 49. — Balm of Gilead, Heart-leaved Balsam Poplar. P. 



balsaniifera, var. candicans (Ait.), Gray. 



Leaves, simple ; alternate ; edge toothed. 



Outline, egg-shape. Apex, taper-pointed. Base, heart- 

 shape. 



Leaf-stem, usually hairy, nearly round. The leaf-buds in 

 the spring are large and varnished, and very fragrant. 



Leaf four to six inches long, nearly as broad ; yellowish 

 when young, becoming dark green above, and whitish 

 beneath ; net-veined. 



Bark, smooth and greenish, and often dark-spotted. 



Found, seldom or never growing wild, but common in 

 cultivation. 

 A tree forty to fifty feet high, loosely and irregularly 



branched, and with abundant foliage. 



