Trees

Click on the species name to see photographs of the plant from WNPS, OSU, and other sources.

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Names	Height	Exposure	Drought Tolerant	Comment	Container Sizes
Acer circinatum vine maple	10-25′	PSH		Single trunk or multi-branched tree, good for shaded spots, moist soil. Great fall color: yellow, orange and red. Peshastin seed source.	40ci, #1, #2
Acer glabrum ssp. douglasii Douglas maple	10-25′	S, PSH	X	Prefers partial shade. A more drought-tolerant maple. Fall color yellow to crimson; red twigs, bright green spring lvs	40ci, #1, #2
Acer macrophyllum bigleaf maple	40-50′	S, PSH		Large, spreading tree, with v. broad leaves. Yellow fall color. Seed source Peshastin, adapted to region’s climate	40ci, #1, #2, #5
Alnus incana mountain alder	20-35′	S, PSH		Small tree found in drainages and in moist areas. Fast-growing, nitrogen fixer. Attractive light-colored bark.	40ci, #1, #2, #5
Alnus viridis ssp. sinuata Sitka alder	8-18′	S, PSH		Shrubby, small tree, thicket-forming, found on moist slopes in the mountains	40ci, #1, #2
Betula occidentalis water birch	20-30′	S, PSH		Graceful tree with drooping branches and coppery-brown bark. Yellow fall color. Found in moist sites, along streams.	40ci, #1, #2, #5
Betula papyrifera paper birch	40-60′	S, PSH		Tall deciduous tree with distinctive white bark on older specimens, found across northern tier of North America	40ci, #1, #2
Crataegus douglasii Douglas hawthorn	12-20′	S, PSH	X	Compact tree with white flower clusters in spring, small purple-black fruits. 1″ thorns. Wildlife food source.	40ci, #1, #2, #5
Juniperus scopulorum Rocky Mountain juniper	10-25′	S	XX	Slow growing bushy small tree, quite drought tolerant. Gray-green leaves, blue berry-like cones	#1, #2, #5, Treepot
Larix occidentalis Western larch	100-150’+	S, PSH		Deciduous conifer, with straight, tapering trunk. Soft light green needles turn golden yellow in fall.	40ci, #1, #2, #5, Treepot
Picea engelmannii Engelmann spruce	50-150′	S, PSH		Found in eastern Cascades forest, needles 0.5-1″ long, usually bluish-green, sharp pointed	40ci, Treepot
Pinus contorta var. latifolia lodgepole pine	40-120′	S	X	Two-needle pine from cold, dry sites in the mountains; can form dense stands	40ci, Treepot
Pinus ponderosa Ponderosa Pine	90-150′	S	X	Widespread conifer of Inland Northwest. Long needles in groups of three, distinctive red bark on mature trees.	40ci, #2, #5, Treepot, Treepot2
Populus tremuloides quaking aspen	25-50′	S		Straight-trunked tree found in groves. White-barked, heart-shaped leaves “quake” in breeze, golden fall color.	40ci, #1, #2, #5
Populus trichocarpa black cottonwood	90-120′	S		Large, fast-growing tree. Large green leaves, silvery below, yellow in fall. Habitat is moist soils, flood plains.	40ci, #1, #2, #5
Pseudotsuga menziesii v. glauca Douglas fir	80-120′	S, PSH	X	Large tree often found in association with Ponderosa pine east of Cascades. Interior var. more drought-tolerant.	40ci, #2, #5, Treepot, Treepot2
Quercus garryana Garry oak	35-50′	S	X	Only WA oak. Deciduous, slow top growth in early years. From Kittitas Co. seed source	40ci, Treepot, Treepot2
Thuja plicata Western red cedar	80-120′	S, PSH		Large conifer of the mountains, moister habitats. Dark green scale like leaves; reddish, fibrous bark	40ci, #2, Treepot, #5, #10

S=Sun, PSH=Partial Shade, SH=Shade

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