194 



TREES OF NORTH AMERICA 



Distribution. Hillsides and rich woods; western New York, eastern Pennsylvania and 

 the District of Columbia to southern Illinois and central Iowa (Ames, Story County), and 



southward to the mountains of North Carolina and Tennessee, and to central Georgia and 

 Alabama; usually rare and local; most abundant and generally distributed in Indiana. With 

 its varieties usually but incorrectly called " Pignut." 



The following varieties differing in the shape of their fruit are distinguished: 



Carya ovalis var. obcordata Sarg. 



Carya microcarpa Darling, in part. 

 Hicoria microcarpa Britt. in part. 



Fruit subglobose to short-oblong or slightly obovoid, I'-lJ' in diameter, with a husk 

 T y-f in thickness, splitting freely to the base or nearly to the base by often narrow-winged 



Fig. 184 



sutures; nut much compressed, slightly angled and often broadest above the middle, 

 rounded and usually more or less obcordate at apex, narrowed and rounded at base. 



