24 Trees with Simple Leaves. [A n 



White Basswood, Wahoo. T. heterophylla, Vent. 



This species differs from T. Americana chiefly in the 

 following items : 

 Leaf, five to eight inches long ; deep green and shining 



above, beneath velvety and silvery white with purplish 



ribs. 

 Foimd, from the mountains of Pennsylvania to Georgia 



and westward. 

 Height, usually twenty to thirty feet. 



T. pubescens, Ait., differs chiefly from T. Americana in 



these particulars : 



Leaves, smaller (two to three inches long), thinner, and 

 somewhat downy beneath. 



Fruit, rounded, about one fourth of an inch in diameter, 

 and with the base of the leaf-like bract to which it 

 is attached usually rounded at the base. 



Found, New York to Florida and westward. 



The cultivated European Linden [T. Europsea] resem- 

 bles the Basswood in its foliage, but the tree is smaller 

 (about forty feet high) and with a pyramid-shaped top. 



Genus ILEX, L. (Holly.) 



Fig. 10. — American Holly. I. opaca, Ait. 



Leaves, simple ; alternate ; edge with remote, very 

 sharp spine-like teeth, with rounded spaces between. 



Outline, oval. Apex and base, pointed. 



Leaf, about two inches long ; dark polished green above ; 

 below rather yellowish-green ; thick and stiff; smooth 

 throughout ; ribs very indistinct below. 



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