Shrubs and trees

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Picture	Common name	Scientific name	Height	Color	Flowering Period	Light Requirement	Moisture Requirement	Description
	Thin leaf alder	Alnus incana	6-15’		spring			Deciduous, multi-stemmed shrub or small tree found in riparian areas of eastern Cascades.
	White alder	Alnus rhombifolia	50 - 80’		spring			Deciduous tree with gray bark. Mature trees multi stemmed. Water dependent.
	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.
	Twinberry	Lonicera involucrata	<9’	yellow	summer			Erect, deciduous shrub. Tubular flowers in pairs. Black ‘twin’ berries not edible.
	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.
	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.
	Stinky currant	Ribes hudsonianum	<5’	white	May - July			Erect deciduous shrub. Flowers growing on up to 6” stalks in clusters of 6-15.
	Prickly currant	Ribes lacustre	3-4’	white	May-June			Deciduous shrub with prickly stems. Bell-shaped flowers occur in drooping cluster of 5-15.
	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.
	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.