120 CONIFERS. Pinus. 



362. Pinus Jeffreyi, Murr. 

 Bull Pine. Black Pine. 



California, — Scott Mountains, south along the Sierra Nevada to the 

 San Bernardino and San Jacinto Mountains. 



A large tree, 30 to 31 metres in height, with a trunk 1.20 to 4 metres 

 in diameter ; dry, gravelly slopes between 0,000 and 8,000 feet elevation ; 

 most common and reaching its greatest development on the eastern slope 

 of the Sierra Nevada. 



Wood light, strong, hard, rather coarse-grained, compact; bands of 

 small summer cells not broad, very resinous, conspicuous ; resin passages 

 few, not large ; medullary rays numerous, obscure ; color light red, the 

 sap-wood pale yellow or nearly white ; largely manufactured into coarse 

 lumber. 



Abietine, a volatile carbo-hydrogen possessing powerful anaesthetic 

 properties, is obtained by distilling the resinous exudation of this species. 



363. Pinus Chihuahuana, Engelm. 



Santa Rita Mountains, Arizona, San Francisco Mountains, southwest- 

 ern New Mexico and Arizona ; in Chihuahua. 



A small tree, 18 to 24 metres in height, with a trunk 0.45 to 0.G0 

 metre in diameter ; dry, rocky ridges and slopes between 5,000 and 7,000 

 feet elevation ; not common. 



Wood light, soft, strong, brittle, close-grained, compact ; bands of small 

 summer cells not broad, resinous, conspicuous ; resin passages few, rather 

 large, conspicuous; medullary rays numerous, thin; color clear light 

 orange, the thick sap-wood lighter. 



364. Pinus contorta, Dougl. 

 Scrub Pine. 



Alaska, south along the coast to Mendocino County, California, ex- 

 tending inland to the western slopes of tin- Coast Ranges. 



A small, stunted tree, to metres in height, witli a trunk 0.30 to 

 0.50 metre in diameter; sandy dunes and exposed rocky points. 



Wood light, hard, strong, brittle, coarse-grained ; bands of small summer 

 cells very broad, resinous, conspicuous ; resin passages numerous, not Large ; 

 medullary rays numerous, obscure ; color light brown tinged with red, the 

 thick sap-wood nearly white. 



365. Pinus Murrayana, Balfour. 



Tamarack. Black Pine. Lodge-pole Pine. Spruce Pine. 



Valley of the Yukon River, Alaska, south through the interior of 



British Columbia, along the mountain ranges of Washington and Oregon 



and the Sierra Nevada of California to Mount San Jacinto ; on the high 



plateau east of the Rocky Mountains in about latitude 56°, and south 



