Shrubs and Trees
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Thin leaf alder (Alnus incana)

Height:
6-15’
Flowering Period:
spring
Light Requirement:

Partial Shade / Shade
Moisture Requirement:

Wet
Deciduous, multi-stemmed shrub or small tree found in riparian areas of eastern Cascades.
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White alder (Alnus rhombifolia)

Height:
50 – 80’
Flowering Period:
spring
Light Requirement:

Full Sun
Moisture Requirement:

Wet
Deciduous tree with gray bark. Mature trees multi stemmed. Water dependent.
-
Serviceberry (Amelanchier alnifolia)

Height:
6-10’
Color:
white
Flowering Period:
April – June
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Tall shrub with blue-green foliage in summer and reddish orange in the fall. Purple fruit provides summer wildlife food source.
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Wyoming big Sagebrush (Artemisia tridentata ss. wyomingensis)

Height:
2-3’
Color:
yellow
Flowering Period:
June
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Evergreen shrub with strongly aromatic leaves. Essential wildlife plant of the high desert.
-
Fringed sage (Artemisia frigida)

Height:
4 – 16″
Color:
green – yellow
Flowering Period:
July – August
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Spreading, fragrant shrublet with grayish green, velvety leaves.
-
Basin big sage (Artemisia tridentata ssp. tridentata)

Height:
3-6’
Color:
yellow
Flowering Period:
June
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant / Moderate Moisture
Evergreen shrub with strongly aromatic leaves. Essential wildlife plant of the high desert.
-
Mountain mahogany (Cercocarpus ledifolius)

Height:
3-15’; up to 35’
Color:
white
Flowering Period:
May-July
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Broadleaf, evergreen shrub to small tree with shiny foliage. Small tubular flowers occur in clusters of 2-3. Feathery plumes on seeds.
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Gray (rubber) rabbitbrush (Chrysothamnus nauseousus)

Height:
2-4’
Color:
yellow
Flowering Period:
Late summer
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Common deciduous shrub of sagebrush –steppe. Attracts butterflies.
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Green (yellow) rabbitbrush (Chrysothamnus viscidiflorus)

Height:
1-4’
Color:
yellow
Flowering Period:
Late summer
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Evergreen to deciduous shrub. Small, sticky, yellow flowers in rounded clusters.
-
Redosier dogwood (Cornus sericea)

Height:
4-20’
Color:
white
Flowering Period:
June-August
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture / Wet
Deciduous shrub. Red to purple bark and twigs provide beautiful winter landscape. White berries provide fall and winter food source for wildlife. Prefers seasonally moist areas.
-
Oceanspray (Holodiscus discolor)

Height:
6-20’
Color:
white
Flowering Period:
May-July
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture
Deciduous shrub with arching multi-branched, reddish gray bark. Flowers drooping on 4-7” clusters. Red fall foliage.
-
Desertspray (Holodiscus dumosus)

Height:
20-60”
Color:
white
Flowering Period:
June-August
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Deciduous shrub with multiple arching branches. Creamy white flower drooping in clusters. Bronze fall foliage.
-
Twinberry (Lonicera involucrata)

Height:
<9’
Color:
yellow
Flowering Period:
summer
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture / Wet
Erect, deciduous shrub. Tubular flowers in pairs. Black ‘twin’ berries not edible.
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Mockorange (Philadelphus lewisii)

Height:
3-10’
Color:
white
Flowering Period:
late May to early July
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture
Erect, deciduous, spreading shrub. Showy white flowers are fragrant and occur in clusters of 3 to 15. Useful to plant in drier areas of riparian zones.
-
Pacific Ninebark (Physocarpus Capitatus)

Height:
6-12’
Color:
white
Flowering Period:
April – July
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture / Wet
Erect, deciduous, spreading shrub with peeling bark. Maple-leaved foliage turns Reddish brown in fall. Rounded clusters of creamy white flowers.
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Black cottonwood (Populus balsamifera ssp. trichocarpa)

Height:
100-200’
Flowering Period:
March – June
Light Requirement:

Full Sun
Moisture Requirement:

Wet
Fast growing, large tree with branching trunk. Yellow fall foliage. Aggressive root system supports streambank stabilization.
-
Quaking aspen (Populus tremuloides)

Height:
16-50’
Flowering Period:
May-June
Light Requirement:

Full Sun
Moisture Requirement:

Moderate Moisture / Wet
White bark and brilliant, yellow fall foliage. Provides food and habitat for wildlife.
-
Antelope bitterbrush (Purshia tridentata)

Height:
2-6’
Color:
yellow
Flowering Period:
April – July
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Evergreen or deciduous shrub with rounded growth form.
-
Stinky currant (Ribes hudsonianum)

Height:
<5’
Color:
white
Flowering Period:
May – July
Light Requirement:

Partial Shade
Moisture Requirement:

Moderate Moisture / Wet
Erect deciduous shrub. Flowers growing on up to 6” stalks in clusters of 6-15.
-
Prickly currant (Ribes lacustre)

Height:
3-4’
Color:
white
Flowering Period:
May-June
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture / Wet
Deciduous shrub with prickly stems. Bell-shaped flowers occur in drooping cluster of 5-15.
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Golden currant (Ribes aureum)

Height:
3-9’
Color:
yellow
Flowering Period:
April – June
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture
Fragrant tubular flowers occur in drooping clusters of 5-10. Yellow to red fall foliage. Dark purple fruit provides summer food source for songbirds and other wildlife.
-
Wax currant (Ribes cereum)

Height:
<3'
Color:
pinkish white
Flowering Period:
April – June
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Spreading, erect and rounded deciduous shrub. Urn shaped flowers occur in drooping clusters of 2-8. Numerous bright red berries post flowering.
-
Snow currant (Ribes niveum)

Height:
<8’
Color:
white
Flowering Period:
spring
Light Requirement:

Full Sun
Moisture Requirement:

Moderate Moisture
Deciduous shrub with edible berry.
-
Red flowering currant (Ribes sanguineum)

Height:
3-12’
Color:
Red – bright pink
Flowering Period:
May-June
Light Requirement:

Full Sun
Moisture Requirement:

Moderate Moisture
Beautiful tubular flowers occur in drooping cluster of 10-25. Attracts hummingbirds. Berries provide food for wildlife.
-
Woods rose (Rosa woodsii)

Height:
<5’
Color:
pink
Flowering Period:
June – August
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture / Wet
Multi-branched deciduous shrub with red stems, prickly on the lower portion. Orange-red rosehips remain throughout winter, providing food source for birds. Prefers moist soil but may be found in drier, open areas. Rhizomatous growth; excellent for stream stabilization or erosion control.
-
Purple sage (Salvia dorrii)

Height:
12-36”
Color:
purple
Flowering Period:
May – July
Light Requirement:

Full Sun
Moisture Requirement:

Drought Tolerant
Small woody shrub with silvery gray, semi-evergreen, aromatic foliage and abundant blooms.
-
Blue elderberry (Sambucus cerulea)

Height:
10-20’
Color:
white
Flowering Period:
May – September
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture
Deciduous shrub or small tree. Abundant, small creamy white flowers in large, conical shaped clusters. Blue berries are edible. Excellent food source for wildlife. Important species in riparian plant communities.
-
Alpine spirea (Spiraea densiflora)

Height:
<36”
Color:
pink
Flowering Period:
June
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Moderate Moisture / Wet
Deciduous shrub with pink dome-shaped flowers. Found in wet meadows and streams at high elevations.
-
Douglas spirea (Spiraea douglasii)

Height:
3-6’
Color:
white
Flowering Period:
July
Light Requirement:

Full Sun / Partial Shade
Moisture Requirement:

Wet
Deciduous shrub with dense, pink elongated flower clusters. Found along marsh edges, wet meadows and streams. Rhizomatous growth; excellent for stream stabilization or erosion control.
