20 THE PRINCIPAL SPECIES OF IVOOD. 



Pin Oak. Quercus palustris Muenchh. 



Nomenclature. (Sudworth.) 



Pin Oak (local and common Water Oak (R. I., 111.). 



name). Swamp Oak (Pa., Ohio, 



Swamp Spanish Oak (Ark., Kans.). 



Kan.). Water Spanish Oak (Ark.). 



Locality. 



Minnesota to Kansas, eastward intermittently to Massachusetts 

 and Virginia. 



Features of Tree. 



Fifty to eighty feet in height, two to four feet in diameter. 

 Full-rounded or pyramidal top, smooth thin bark, numerous 

 small pin-like branches. 



Color, Appearance, or Grain of Wood. 



Heartwood variegated light brown, sapwood nearly white, 

 coarse-grained, medullary rays numerous and conspicuous. 



Structural Qualities of Wood. 



Heavy, hard, strong, checks badly in seasoning. 



Representative Uses of Wood. 



Shingles, clapboards, construction, interior finish, cooperage. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 



43- 

 Modulus of Elasticity. 



1,500,000. 

 Modulus of Rupture. 



15,400. 



Remarks. 



Palustris, the Latin for swampy, refers to favorite location of 

 tree. The numerous slender secondary branches suggesting 

 pins cause tree to be easily recognized, particularly in winter. 



