54 KEY TO GENERA AND SPECIES 



Fig. 94. White Poplar. 



out the range. (Fig. 95.) Large-toothed 

 Aspen, Large-toothed Poplar, Poplar, Pop- 

 ple, Populus grandidentata Michx. 

 99. Teeth 6 or more per inch of margin 100. 



Fig. 95- 



Large-toothed Aspen. 



Fig. 96. 

 American Aspen. 



