EXOGENOUS SERIES BROADLEAF WOODS 61 



Pecan, (Hickory). \Hicoria pecan Mar S h 



3 ' ( Carya ohvceformis Nutt. 



Nomenclature. (Sudworth.) 



Pecan (local and common name). 

 Pecan Nut, Pecan-tree, Pecanier (La.). 



Locality. 



Valley of Mississippi, southward to Louisiana, Texas, and 

 Mexico. 



Features of Tree. 



Ninety to one hundred feet in height, sometimes higher. Two 

 and one-half to five feet in diameter. A. tall tree, smooth- 

 shelled oblong edible nuts. 



Color, Appearance, or Grain of Wood. 



Heartwood light brown, tinged with red, sapwood lighter 

 brown. Close-grained and compact, medullary rays numerous 

 but thin. 



Structural Qualities of Wood. 

 Heavy, hard, not strong, brittle. 



Representative Uses of Wood. 



Fuel, seldom used in construction. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 

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

 44. 



Modulus of Elasticity. 



2,530,000 (average of 37 tests by U. S. Forestry Div.).* 



940,000. 



Modulus of Rupture. 



15,300 (average of 37 tests by U. S. Forestry Div.).* 



8, 200. 



Remarks. 



Grows on borders of streams in low rich soil. Largest and 

 most important tree of western Texas. The sweet edible nuts 

 form an important article of commerce. 



See page S. 



