EXOGENOUS SERIES— NEEDLELEAF IVOODS. 135 



White Pine. Pinus flexilis James. 



Nomenclature. (Sudworth.) 



White Fine (Cal., Nev., Utah, Bull Pine (Col.). 



Col., N. M.). Western and Rocky Mountain 

 Pine (Utah, Mont.). White Pine (Cal.). 



Locality. 



Rocky Mountains, Montana to Mexico. 



Features of Tree. 



Forty to fifty feet in height, one to three feet in diameter. 

 Tufts of five rather short, rigid leaves in sheaths. 



Color, Appearance, or Grain of Wood. 



Heartwood light, clear yellow, turning red from exposure. 

 Sapwood nearly white. Close-grained, compact structure, 

 numerous and conspicuous medullary rays. 



Structural Qualities of Wood. 

 Light, soft. 



Representative Uses of Wood. 

 Construction. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 



27. 

 Modulus of Elasticity. 



960,000. 

 Modulus of Rupture. 



Remarks. 



This tree forms mountain forests of considerable extent. Valued 

 locally. 



