The Pines 



i 



rich in resin. Chief among these is P. paltistria. It includes the \ 



other Southern lumber pines and P. rigida in the Eastern States. j 



" Georgia pine " is P. palustris. " North Carolina pine " is \ 

 P. echinata. 



The "soft pines" have soft, light wood, with little resin, ' 



easy to work the carpenter's delight. The principal ones are i 



P. Strobus, in the North and East, P. Lambert/ana, of the Pacific j 



coast, and two Rocky Mountain species, P. monticola and P. I 



flexilis. ; 



"Jack pines," used locally for ties and timbers, but not in I 

 the regular lumber trade, are small or medium-sized trees : P. 

 rigida, P. yirginiana and P. divaricata in the East and North ; 



P. contorta, var. Murrayana, one in the West. j 



THE SOFT PINES 



Leaf bundles in loose, deciduous sheaths. Cone scales 

 usually unarmed. Wood soft, light coloured, close grained. 



KEY TO SPECIES 



A. Leaves 5 in a bundle. 



B. Cones long stemmed; scales thin; leaves 3 to 4 

 inches long. 

 C. Leaves slender, flexible; cones 5 to 8 inches long. 

 D. Cone scales not recurved at maturity; leaves 



bluish green. {P. Strobus) white pine *- 



DD. Cone scales recurved at maturity; leaves pale 

 green. {P. strobiformis) Arizona white pine 

 CC. Leaves stout, stiff. 



D. Cones 5 to 12 inches long; limbs grey. 



{P. monticola) mountain pine ^ 

 DD. Cones 12 to 18 inches long; limbs green. 



(P. La?nbertiana) SUGAR pine 

 BB. Cones short stemmed; scales thick; leaves 1 to 2 

 inches long. 

 C. Leaf bundles scattered; cones 3 to 10 inches long, 



opening at maturity. ^ 



{P. flexilis) ROCKY mountain white pine 

 CC. Leaf bundles in crowded clusters. 



D. Leaf clusters at ends of twigs; cones not open- 

 ing; bark pale. z^ 

 {P. albicaulis) white-bark pine^ 

 22 



