Postelsia 159 
thickened, terminating in short, incurved 
triangular tips. Pinus albicaulis 
Pinus monticola Douglas ex Lambert gen. 
Brus, di1:3: plc7. 1837- WhiteoPime. 
A tree 30 meters or more in height, with com- 
paratively slender spreading branches; foliage 
leaves in fascicles of five, triangular, rigid, mi- 
nutely serrulate, bluish-green, glaucus,5-r1o centi- 
meters long; cones cylindrical, 12-30 centimeters 
long, their scales but shghtly thickened at the 
end, tipped with a small umbo, widely spread- 
ing after the discharge of the seeds; seeds about 
1 centimeter long, with wings about 3 centimet- 
ers inlength. Vancouver Island and the southern 
mainland of British Columbia, southward and 
eastward to Montana, Idaho and the Sierras of 
central California. 
A large tree with a trunk from one to two 
meters in diameter. Young trees have pale gray 
bark, which is often covered with small balsam 
blisters similar to those which commonly occur 
on young balsam fir trees. With age the bark 
becomes thicker, reddish-brown and rugose. The 
arge cones fall after the seeds are scattered and 
