Vegetation Zones of Washington

Zone dominant species  

elevation

Sitka spruce

Picea sitchensis

Sitka spruce, western hemlock, western redcedar

 

 

 

West of Cascades

low

western hemlock

Tsuga heterophylla

western hemlock, Douglas-fir, western redcedar

low

Pacific silver fir

Abies amabalis

Pacific silver fir, noble fir, western white pine

medium

mountain hemlock

Tsuga mertensiana

mountain hemlock, subalpine fir, Alaska yellow cedar

high

subalpine fir

Abies lasiocarpa

subalpine fir, Englemann spruce, whitebark pine

 

 

 

East of Cascades

high

Douglas-fir

Pseudotsuga menziesii

Douglas-fir, ponderosa pine

medium

ponderosa pine

Pinus ponderosa

ponderosa pine, lodgepole pine

medium
shrub-steppe sagebrush, juniper

low
bunchgrass-steppe bunchgrasses

low