PINACE.E 



395 



Wood light, cabout 27 lb. per cu. ft., with small resin-ducts. 

 Heartwood orange-yellow or brownish, sapwood narrow and 

 creamy white, annual rings close. The timber is soft, easily 

 worked, and used locally for building construction and other 

 purposes. Although of fair quality and of considerable use in 

 its native country, it has no value elsewhere, and the cost of 

 extraction is likely to limit its further exploitation. 



Fig. 8d.—PINUS FLEXILIS. 



a, cud of branch wth winter bud and leaf clusters ; b, cluster of five leaves ; c, apex of entire leaf ; 



(I, section of leaf. 



The tree grows slowly in the British Isles and is not common 

 in collections. Isolated specimens have a narrow pyramidal 

 outline, after the manner of P. Cembra, and succeed in light, well- 

 drained, loamy soil. Although it occurs very frequently in dry, 

 rocky positions in a natural state, it attains its greatest luxuriance 



