p s t e I s i a i 



D/ 



ing a round or irregularly flattened top, or often 

 dwarf and shrubby; foliage leaves in clusters of 

 two, dark green, semi-cylindrical with concave 

 nner faces, 3-6 centimeters long, about i milli- 

 meter wide, acute, and very minutely serrulate; 

 cones often clustered, oval or subcylindrical, 

 not deciduous; cone-scales hard, woody, thin, 

 the exposed end slightly thickened and armed 

 with a long slender somewhat recurved, finally 

 deciduous spine; seeds about 2 millimeters long, 

 with thin wings about i centimeter in length. 

 Along the coast from Alaska to northern Cali- 

 fornia and eastward to the Cascade range. 

 Farther east it yields gradually to the variety 

 Murrayana, which is one of the most abundant 

 trees in the more arid forest regions of the in- 

 terior from northern British Columbia to Colo- 

 rado and the mountains of southern California. 

 In western Vancouver Island, this species is 

 found as a low contorted shrub along the edge 

 of the forest next to the ocean, and as a small 

 irregular, flat-topped, slow-growing tree in the 

 sphagnum bogs of the forest region. It seldom 

 reaches a height of ten meters and it is often 



