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Sorbus sitchensis

Sorbus sitchensis M. Roem.

Sitka mountain-ash, Western mountain ash

Rosaceae (Rose Family)

Synonym(s):

USDA Symbol: sosi2

USDA Native Status: L48 (N), AK (N), CAN (N)

A 3-10 ft. shrub with many erect to spreading stems from a common base. Foliage is pinnately compound with 7-9 toothed leaflets. Flowers are small and white in dense, flat-topped clusters. They are followed by huge clusters of big, reddish-orange, persistent berries. Fall foliage is yellow to bronzy-red.

The Sitka Mountain Ash is a member of the family Rosaceae which includes about 2000 species of trees, shrubs, and herbs worldwide; approximately 77 native and 9 naturalized tree species and many species of shrubs and herbs in North America; including service-berries (Amelanchier), hawthorns (Crataegus), apples (Malus), plums and cherries (Prunus), and mountain-ashes (Sorbus).

 

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Plant Characteristics

Duration: Perennial
Habit: Shrub
Autumn Foliage: yes
Flower:
Fruit: Red
Size Class: 6-12 ft.

Bloom Information

Bloom Color: White
Bloom Time: Jun , Jul

Distribution

USA: AK , CA , ID , MT , OR , WA
Canada: BC
Native Distribution: AK & Yukon, s. through mts. to n. CA, e. to e. B.C., n. ID & n.w. MT
Native Habitat: Wooded or open, upper montane to subalpine slopes

Growing Conditions

Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Moist
Soil Description: Moist to drier, well-drained soil.
Conditions Comments: Not Available

Benefit

Use Wildlife: Grouse, cedar waxwings & grosbeaks consume the berries.
Attracts: Birds

Propagation

Description: Usually propagated by seed sown fresh in fall or stored and stratified.
Seed Collection: Not Available
Seed Treatment: Cold stratify at 32 degrees for 2-4 months.
Commercially Avail: yes

Find Seed or Plants

Find seed sources for this species at the Native Seed Network.

National Wetland Indicator Status

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: FACU FAC FAC FAC
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

Bibliography

Bibref 841 - Native Alternatives to Invasive Plants (2006) Burrell, C. C.

Search More Titles in Bibliography

Additional resources

USDA: Find Sorbus sitchensis in USDA Plants
FNA: Find Sorbus sitchensis in the Flora of North America (if available)
Google: Search Google for Sorbus sitchensis

Metadata

Record Last Modified: 2007-01-01
Research By: TWC Staff

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