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THE BOOK OF FORESTRY 



THE ASPENS 



TREMBLING ASPEN 

 Populua tremidoidea 



BIG TOOTH ASPEN 

 Popidus grandidentata 



BARE 



Thin, bitter to the taste, pale 

 green or nearly white, often 

 marked with circular bands of 

 wart-like growths. Bark is 

 quite dark near the ground. 



BARK 



Smooth, light above, brown 

 near ground, no bitter taste. 



LEAVES 



Oval, pointed with small teeth. 

 Stems flattened from side to 

 side, causing the leaves to 

 flutter in the slightest breeze. 



LEAVES 



Broadly oval, 3"-4" long with 

 large teeth. 



RANGE 



From Hudson Bay to Alaska, to 

 Lower California. It is the 

 most widely distributed tree 

 in America. 



RANGE 



Southern Canada to Northern 

 Minnesota. South along the 

 Appalachians to North Caro- 

 lina. 



The poplar family is composed of nine members be- 

 sides the two described above. The trees are fast-growing 

 and short-lived as a rule. On account of their light seed, 

 liberated attached to flecks of down, they are carried 

 long distances on the wind. In the North they are 

 likely to form dense forests following extensive fires. 

 Their rapid growth and the ease with which they may 

 be reproduced from cuttings make them valuable to 

 plant for wind breaks where quick protection is needed. 



