66 WOOD AND FOREST. 



5 



WESTERN YELLOW PINE. BULL PINE. 



Bull refers to great size of trunk. 



Pinus ponderosa Lawson. 

 Pinus, the classical Latin name; ponderosa refers to great size of trunk. 



Habitat. 



Leaf. 



Habitat: (See map); 

 best in Rocky Mountains. 



Characteristics of the 

 Tree: Height, 100' to 

 300'; diameter, 6' to even 

 12'; branches, low, short 

 trunk; bark, thick, dark 

 brown, deep, meandering 

 furrows, large, irregular 

 plates, scaly; leaves, in 

 twos or threes, 5" to 11" 

 long, cones" to 6" long. 



Appearance of Wood: 



Color, light red, sap-wood, 

 thick, nearly white, and 

 very distinct; non-porous; 

 rings, conspicuous; grain, 

 straight; rays, numerous, 

 obscure; very resinous but 

 ducts small. 



Physical Qualities : 



Weight, light (44th in 

 this list), 25-30 Ibs. per 

 cu. ft, sp. gr. 0.4715; 

 strength, medium (45th 



