EXOGENOUS SERIES-BROADLEAF WOODS. 53 



. /TT . . ( Hi cori a glabra Mill. 



Pignut (Hickory). Cara ^ ^ 



Carya 



Nomenclature. (Sudworth.) 



Pignut (local and common Bitternut (Ark., 111., la., Wis. ). 



name). White Hickory (N. H., la.). 



Black Hickory (Miss., La., Broom Hickory (Mo.). 



Ark., Mo., Ind., la.). Hardshell (W. Va.). 



Brown Hickory (Del., Miss., Red Hickory (Del.). 



Tex., Tenn., Minn.). Switchbud Hickory (Ala.). 



Locality. 



Ontario to Florida, westward intermittently to southern 

 Nebraska and eastern Texas. 



Features of Tree. 



Seventy-five to one hundred feet in height, occasionally higher; 

 Two to four feet in diameter. Rather smooth bark. Large 

 thick -shelled nuts, kernels often astringent or bitter. 



Color, Appearance, or Grain of Wood. 



Heartwood light and dark brown, thick sapwood, lighter, 

 nearly white. Close-grained. 



Structural Qualities of Wood. 



Heavy, hard, flexible, tough, strong. 



Representative Uses of Wood. 



Similar to those of shagbark hickory. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 

 56 (U. S. Forestry Div. ).* 



5i- 

 Modulus of Elasticity. 



2,730,000 (average of 30 tests by U. S. Forestry Div.).* 



1,460,000. 



Modulus of Rupture. 



18,700 (average of 30 tests by U. S. Forestry Div.).* 



14,800. 



Remarks. 



Nuts are devoured by pigs, whence the name porcina. 



* See page 6. 



