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Corxell Junior Extension Bulletin 26 



13. LARGE-TOOTHED ASPEN 

 (Populus grandidentata Michaux) 



Large-toothed aspen is a medium-size. 1. rapid-growing, short -lived 

 "weed" tree developing best on deep moist soils, but occurring com- 

 monly also on dry. upland, sandy or stony sites, where it rapidly covers 



slashes and burns. Here it acts as 

 a temporary shelter for seedlings of 

 more valuable species. The wood is 

 similar to that of the trembling as- 

 ^ pen and is used for excelsior, pulp, 

 and Avoodemvare. 



Bark — resembles that of small- 

 toothed aspen, though small branches 

 are of a more pronounced yellow 

 color. The lower trunk is generally 

 less deeply furrowed than is that of 

 the trembling aspen. 



Twigs — stout, round, reddish or 

 yellowish brown in color in early 

 winter, often pale and downy as 

 contrasted with those of the trem- 

 bling aspen which are shiny. 



Winter buds — usually larger than 

 those of the trembling aspen, ter- 

 minal bud present; lateral buds gen- 

 erally bending away from twig, dull, dusty-looking, light chestnut brown 

 in color. 



Leaves — alternate, simple, from 3 to 6 inches long r roughly triangular 

 with broadly wedge-shaped bases, pointed apexes, coarsely toothed mar- 

 gins in direct contrast to the finely serrate margins of the trembling 

 aspen. 



Fruit — very similar to that of trembling aspen (page 21) spread by 

 wind in much the same wav. 



LARGE-TOOTHED ASPEN 

 Leaf, one-half natural size ; twig, one- 

 half natural size ; fruit, one-half natural 



size 



