690 



TREES OF NORTH AMERICA 



Distribution. Southeastern Ohio to western Pennsylvania (Kittaning, Armstrong 

 County) and eastern and middle Tennessee, and to southern Ontario, the southern penin- 



Fig. 621 



sula of Michigan, eastern and central Indiana, southern Illinois, eastern Missouri and 

 northwestern Arkansas (Eureka Springs, Carroll County); rare and local in its extreme 

 form; its 3-lobed leaves sometimes appearing on upper branches of trees bearing on lower 

 branches leaves of the typical Sugar Maple. 



Acer saccharum var. sinuosum Sarg. 

 Acer sinuosum Rehd, 



Leaves suborbicular, broader than long, 3-5-lobed with short triangular-ovate to tri- 

 angular-oblong obtuse lobes, entire or on vigorous shoots occasionally dentate, usually 

 broad-cordate at base, often with the nerves of the two lateral lobes projecting into the 



Fig. 622 



