Shrubs and trees

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Picture	Common name	Scientific name	Height	Color	Flowering Period	Light Requirement	Moisture Requirement	Description
	Mountain mahogany	Cercocarpus ledifolius	3-15’; up to 35’	white	May-July			Broadleaf, evergreen shrub to small tree with shiny foliage. Small tubular flowers occur in clusters of 2-3. Feathery plumes on seeds.
	Gray (rubber) rabbitbrush	Chrysothamnus nauseousus	2-4’	yellow	Late summer			Common deciduous shrub of sagebrush –steppe. Attracts butterflies.
	Green (yellow) rabbitbrush	Chrysothamnus viscidiflorus	1-4’	yellow	Late summer			Evergreen to deciduous shrub. Small, sticky, yellow flowers in rounded clusters.
	Desertspray	Holodiscus dumosus	20-60”	white	June-August			Deciduous shrub with multiple arching branches. Creamy white flower drooping in clusters. Bronze fall foliage.
	Black cottonwood	Populus balsamifera ssp. trichocarpa	100-200’		March - June			Fast growing, large tree with branching trunk. Yellow fall foliage. Aggressive root system supports streambank stabilization.
	Quaking aspen	Populus tremuloides	16-50’		May-June			White bark and brilliant, yellow fall foliage. Provides food and habitat for wildlife.
	Antelope bitterbrush	Purshia tridentata	2-6’	yellow	April - July			Evergreen or deciduous shrub with rounded growth form.
	Wax currant	Ribes cereum	<3'	pinkish white	April - June			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	<8’	white	spring			Deciduous shrub with edible berry.
	Red flowering currant	Ribes sanguineum	3-12’	Red – bright pink	May-June			Beautiful tubular flowers occur in drooping cluster of 10-25. Attracts hummingbirds. Berries provide food for wildlife.
	White alder	Alnus rhombifolia	50 - 80’		spring			Deciduous tree with gray bark. Mature trees multi stemmed. Water dependent.
	Fringed sage	Artemisia frigida	4 - 16"	green - yellow	July - August			Spreading, fragrant shrublet with grayish green, velvety leaves.
	Basin big sage	Artemisia tridentata ssp. tridentata	3-6’	yellow	June			Evergreen shrub with strongly aromatic leaves. Essential wildlife plant of the high desert.
	Wyoming big Sagebrush	Artemisia tridentata ss. wyomingensis	2-3’	yellow	June			Evergreen shrub with strongly aromatic leaves. Essential wildlife plant of the high desert.
	Serviceberry	Amelanchier alnifolia	6-10’	white	April - June			Tall shrub with blue-green foliage in summer and reddish orange in the fall. Purple fruit provides summer wildlife food source.
	Purple sage	Salvia dorrii	12-36”	purple	May - July			Small woody shrub with silvery gray, semi-evergreen, aromatic foliage and abundant blooms.
	Blue elderberry	Sambucus cerulea	10-20’	white	May - September			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	<36”	pink	June			Deciduous shrub with pink dome-shaped flowers. Found in wet meadows and streams at high elevations.
	Douglas spirea	Spiraea douglasii	3-6’	white	July			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.
	Woods rose	Rosa woodsii	<5’	pink	June - August			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.
	Prickly currant	Ribes lacustre	3-4’	white	May-June			Deciduous shrub with prickly stems. Bell-shaped flowers occur in drooping cluster of 5-15.
	Golden currant	Ribes aureum	3-9’	yellow	April - June			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.
	Twinberry	Lonicera involucrata	<9’	yellow	summer			Erect, deciduous shrub. Tubular flowers in pairs. Black ‘twin’ berries not edible.
	Mockorange	Philadelphus lewisii	3-10’	white	late May to early July			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	6-12’	white	April - July			Erect, deciduous, spreading shrub with peeling bark. Maple-leaved foliage turns Reddish brown in fall. Rounded clusters of creamy white flowers.
	Redosier dogwood	Cornus sericea	4-20’	white	June-August			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	6-20’	white	May-July			Deciduous shrub with arching multi-branched, reddish gray bark. Flowers drooping on 4-7” clusters. Red fall foliage.
	Stinky currant	Ribes hudsonianum	<5’	white	May - July			Erect deciduous shrub. Flowers growing on up to 6” stalks in clusters of 6-15.
	Thin leaf alder	Alnus incana	6-15’		spring			Deciduous, multi-stemmed shrub or small tree found in riparian areas of eastern Cascades.