152 Trees with Simple Leaves. [Bin 



interior finish and the making of furniture, for its ashes, 

 which give large quantities of potash ; especially for its 

 sap, which yields the "maple sugar" of commerce. 



Accidental variations furnish the handsome Bird's-eye 

 Maple and Curled Maple. 



The yield of sugar by an average tree in one season 

 is from five to ten pounds. 



Fig. 76. Black Maple. A. s., var. nigrum, T. and G. 



This variety is distinguished from its species (i. e., 

 from the Sugar Maple) by the shape of its leaf, which, 

 however, is somewhat variable, and also Ly the following 

 items : 



Bark, blackish. 



Base of the leaf, when heart-shaped, sometimes with over- 

 lapping lobes. 



Seed-wings, set wide apart, but only slightiy diverging. 



Found, chiefly along streams and in river bottoms, from 

 Western Vermont to Missouri and Northern Alabama. 



Fig- 77- Silver Maple, White Maple, Soft Maple. A. sac- 

 charinum, L. A. dasycarpum, Ehr. 



Leaves, SIMPLE ; OPPOSITE ; EDGE DEEPLY LOBED, with the 

 lobes unequally notched and toothed. 



Outline, rounded, with five lobes (the lowest pair much 

 the smallest), and with the hollows between the lobes 

 pointed and usually extending half way to the base of 



