52 KEY TO GENERA AND SPECIES 



95. Marginal teeth of the leaves averag- 

 ing 10 to 15 per inch 96. 



95. Marginal teeth of the leaves averag- 

 ing 15 to 30 per inch, blunt 97. 



96. Length of the leaf-blade about 4 

 times the width. Marginal teeth 

 blunt. Very variable. Cult, and 

 escaped. Native in Eurasia. (Fig. 

 88.) Crack Willow, Salix fra- 

 gilis L. 



96. Length of the leaf-blade about 8 

 times the width; lower surface of 

 the leaf pale. Marginal teeth sharp. 

 Branches pendulous. Cult, and es- 

 caped. Native in the Caucasus. 

 (Fig. 89.) Weeping Willow, Napoleon's 

 Willow, Salix babylonica L. 



Fig. 88. 

 Crack 

 Willow. 



Fig. 89. 



Fig. 

 ite Wi 



90. 



Fig. 91. 



Weeping Willow. White Willow. Yellow Willow. Blue Willow 



Fig. 92. 



