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Mahonia nervosa (Pursh) Nutt.
Cascade barberry, Cascade Oregon-grape
Synonyms: Berberis nervosa
USDA Symbol: mane2
USDA Native Status: Native to U.S.
A 1-2 ft. shrub with unbranched stems from long rootstocks. Pinnate leaves occur in terminal tufts and are glossy green with spiny teeth. Drooping racemes of yellow flowers are followed by blue berries with a grayish bloom.
This shrub is usually between 4 and 24 inches tall and is often called Dwarf Oregon-grape. It used to be placed in the genus Berberis.
Plant CharacteristicsDuration: Perennial Habit: Shrub Leaf:
Dark Green Flower:
Blue 8-11 mm Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: Apr , May , Jun
CA , ID , OR , WA Canada: BC Native Distribution:
N. & c. CA Coast Ranges to B.C. & n. ID Native Habitat:
Wooded slopes below 6000 ft. USDA Native Status: L48(N), CAN(N)
Growing ConditionsWater Use: Low
Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Dry , Moist
CaCO3 Tolerance: Low
Soil Description: Rich, well-drained soils.
Conditions Comments: Slow to establish.
BenefitUse Medicinal: The Skagit tribe used Berberis nervosa medicinally in a root preparation to treat venereal disease (D. E. Moermann 1986).
Conspicuous Flowers: yes
PropagationDescription: Increase is possible with seed.
Seed Collection: Ripe fruits may be pick by hand, using heavy gloves, or flailed onto cloth beneath the bushes. Seeds can be removed through maceration and flotation.
Commercially Avail: yes
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:
Santa Barbara Botanic Garden
- Santa Barbara, CANative Seed Network
- Corvallis, OR
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Record Modified: 2007-01-01
Research By: TWC Staff