WILLOW FAMILY, Salicaceae 



Willows have long narrow leaves. 



13. Black Willow, Salix nigra. Leaves V\-Y\ in. wide. " 

 Only willow of tree size with 2 crescent-shaped stipules 

 at the base of each leaf. (G). 



14. Peach-leaved Willow, Salix amygdaloides. 

 Leaves. Y^-\Va in. wide, with sharp teeth. Its leaf is 

 broad, tapering to a long slender tip. (N. W.) i 



15. Crack Willow, Salix fragilis. Leaves Yz-^-Vz in." 

 wide, with 10-15 blunt teeth to the inch. The weeping 

 willow is the only other having so few teeth to the inch. 

 (G., I.) 



16. Weeping Willow, Salix babylonica. Leaves tV 

 % in. wide, very slender with 10-15 sharp teeth to the g 

 inch. (I.) * 



Poplars have trembling leaves because the leaf stalks 

 are flattened sideways. 



17. White Poplar, Populus alba. Leaves 4-7 in. 

 long. Under surface of leaves cottony-white. (G). 



18. American Aspen, Populus tremuloides. Leaves 

 \V2-2V2 in. long. The leaves of this poplar are roundish- 

 heart-shaped with more than 6 teeth to the inch. (N). 



19. Large Toothed Aspen, Populus grandidentata. 

 Leaves 3-5 in. long. As the name implies, the leaves 

 have large teeth, 5 or less to the inch. (G). 



20. Downy Poplar, Populus heterophylla. Leaves 

 4-7 in. long, veins downy beneath. This is the only 

 poplar, whose leaf stalk is not at all flattened sideways. 

 May be recognized by the blunt tips and heart-shaped 

 bases of its leaves. (N. W., C.) ^^ 



21. Balsam Poplar, Populus balsamifera. Leaves^P 

 3-6 in. long whitish beneath. May be distinguished from 

 the Balm of Gilead by its narrower leaf which is 

 rounded and widest at the base, tapering gradually to 

 the tip. (N. E.) 



22. Balm of Gilead, Populus candicans. Leaves 4-6 ^ 

 in. long. May be confused with the Balsam Poplar be- ^p 

 cause both have brown, sticky, aromatic buds. Its leaf, 

 however, is broader and is hairy beneath. (I). 



23. Carolina Poplar, Cottonwood, Populus del- 

 toides. Leaves 3-6 in. long. The leaf-blade of this poplar 



is triangular and longer than broad. (G). ^ 



24. Lombardy Poplar, Populus nigra italica. Leaves ^P 

 2-4 in. long. This poplar also has triangular-shaped leaf- 

 blades but they are broader than long. Tree a slender 

 spire. (I). 



