EXOGENOUS SERIES NEEDLELEAF WOODS. 141 



White Pine. Pinus flexilis James. 



Nomenclature. (Sudworth.) 



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



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

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



Limber Pine. Limber-twig Pine. 



Rocky Mountain Pine. Arizona Flexilis Pine. 



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. Saws, plains, nails and paints well. Fairly durable, 

 similar to Pinus strobus. 



x Representative Uses of Wood. 

 s, Construction. Similar to Pinus strobus. 



Weight of Seasoned Wood in Pounds per Cubic Foot. 



27. 

 Modulus of Elasticity. 



960,000. 

 Modulus of Rupture. 



8800. 



Remarks. 



This tree forms mountain forests of considerable extent. Valued 

 locally. All White Pine is quite durable even in exposed posi- 

 tions. White Pine stumps (notably Pinus strobus) outlast 

 those of oak and many other harder woods. It often happens 

 that settlers do not attempt to remove hard wood stumps, 

 knowing that they will soon rot out, but pine stumps are best 

 removed at once. White Pine sidewalks are very satisfactory, 

 but the wood serves best when painted or in interiors. 



