FOREST TREES OF THE PACIFIC SLOPE. 



177 



some importance for the forester, because it forms a low, matted ground cover 

 on the highest and most exposed slopes and crests, and so retains much debris 

 and effectively holds masses of snow. 



Longevity. — Very little is known of its length of life. It probably lives for 

 several centuries. Trees from 2 to 4 inches in diameter are from 25 to 33 years 

 old. 





Fig. G8. — luniperua communis. 



RANGE. 



From Greenland to Alaska and in the east south along the Appalachians to northern 

 Georgia, to Ohio. Michigan, and northern Nebraska : in Rocky Mountains to Texas, New 

 Mexico, and Arizona; in Pacific region south to northern California, in Alaska at sea 

 level to 3,000, in California at 8,300 to 9,800 feel : also In old World. 



Alaska — North at least to Yukon Valley and wesl to Kenai Peninsula on the 

 Pacific Coast. Noted about Arctic Circle at Walker Lake source of Kobuk River (lat. 



