Postelsia 181 
of ordinary foliage leaves; seeds without resin 
vesicles, winged. 
Three closely allied species, two of western 
North America, one of Japan. 
Abies taxifolia (Lambert) Poiret, Lamark. 
Dict=(67523. 1804: 
[Pseudotsuga taxijolia (Lambert) Britton] Doug- 
las Fir, Red Fir, Douglas Spruce. 
A large tree with a massive trunk; leaves 
I.5-3-5 centimeters long, flat, petiolate, usually 
rounded and obtuse at the apex; cones oval- 
cylindrical, 4-11 centimeters long, with woody, 
broadly ovate scales, and much exserted, deeply 
lobed bracts; seeds about 5 millimeters long, 
with narrow oblique wings about 1 centimeter 
long. From central British Columbia and Alberta 
southward to central California and along the 
Rocky Mountains to Texas, Arizona and Mexico. 
The Douglas fir is one of the largest forest 
trees of America, being exceeded in height and 
massiveness of stem only by the Sequoias. It 
reaches its maximum development in western 
Washington and southwestern British Columbia, 
where trees of this species are often sixty meters 
