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Sorbus scopulina Greene
Cascade mountain-ash, Greene's mountain ash, Western mountain-ash
USDA Symbol: sosc2
Cascade mountain-ash is a shrub or shrub-like tree with several erect stems to 3-12 ft. Bark is reddish. Deciduous leaves are pinnately compound with 11-15 shiny, oblong leaflets. Small, white flowers occur in large terminal clusters and are followed by persistent, red-orange berries. A shrub forming dense clumps, or rarely a small tree, with many small white flowers and small, applelike fruit.
This shrubby species takes the form of a small tree in southeastern Alaska. The common name honors Edward Lee Greene (1843-1915), the United States botanist who prepared the description. Birds and mammals eat the fruit.
Plant CharacteristicsDuration: Perennial Habit: Shrub Leaf:
Green Autumn Foliage:
yesFruit: Size Class:
Bloom InformationBloom Color: White
Bloom Time: Jun
, WY Canada: AB
, BC Native Distribution:
W. Alt. to AK,
s. to NM, UT
& Tulare Co., CA; also Black Hills Native Habitat:
Canyons; wooded slopes; stream banks; 4000-9000 ft.
Growing ConditionsWater Use: Medium
Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Moist
CaCO3 Tolerance: Low
Soil Description: Rich soils.
Conditions Comments: Not Available
BenefitUse Wildlife: Grouse, cedar waxwings, and grosbeaks consume the berries.
Conspicuous Flowers: yes
Fragrant Flowers: yes
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Native Seed Network
- Corvallis, OR
Record Last Modified: 2007-07-01
Research By: TWC Staff