94 Trees with Simple Leaves. [A n 



Fig. 50. Lombardy Poplar. [P. dilatata, Ait.'} 

 Leaves, SIMPLE ; ALTERNATE ; EDGE TOOTHED. 



Outline, very broad oval (approaching diamond shape). 

 Apex, pointed. Base, pointed. 



Leaf-stem, flattened sidewise. 



Leaf, usually about two inches long, width and length 

 about the same. 



Introduced about one hundred years ago from Italy, and 

 now often found in old settlements. 



A tall and very slender tree, with crowded, perpen- 

 dicular branches. 



Fig. 51. Silver-Leaf Poplar, Abele, White Poplar. [P. alba, Z.] 



Leaves, SIMPLE ; ALTERNATE ; EDGE USUALLY LOBED (the 

 lobes toothed). 



Outline, broad egg-shape. Base, usually slightly heart- 

 shaped. Apex of the lobes, blunt-pointed. 



Leaf-stem, downy and nearly round. 



Leaf, usually about two and a half inches long ; when 

 mature, smooth and dark green above, below downy 

 and almost snow-white. In the young leaves both 

 surfaces and the leaf-stem are snowy-white and downy. 



A native of Europe ; now widely introduced. 



A very ornamental tree, but troublesome in cultiva- 

 tion, and now out of favor because of the abundance of 

 suckers that spring from its roots. 



NOTE. See Chestnut Oaks with their genus under Sec. A, ///. (a), 



