Vascular Plants - Berberidaceae - Berberis:
Berberis nervosa
Page Authors: Don Knoke, David Giblin
Cascade Oregon-grape, dull Oregongrape, Oregon grape 
Blooms: March-June
Habit: shrub
Duration: perennial
Origin: Native
Conservation Status: Abundant; of no concern.

Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, also in northern Idaho.
Habitat: Open woods, sea level to moderate elevations in the mountains.
Species Description:

General: Strongly rhizomatous evergreen shrub, the aerial stems 1-3 dm. long, ascending to erect.
Leaves: Leaves alternate, pinnate, tufted, leathery; leaflets 9-19, ovate-lanceolate, 3-6 cm. long, coarsely serrate-spiny, palmately 3-8 nerved, both surfaces somewhat dull.
Flowers: Inflorescence of bracteate racemes up to 20 cm. long; perianth of 5 alternating whorls of 3 members each; outer 3 greenish-yellow, 2-3 mm. long (bracts); next 6 bright yellow, 6-8 mm. long (sepals); inner 6 bright yellow, slightly shorter, bi-lobed, oblong (petals); stamens 6, opposite the petals; filaments without teeth at the tip; style none, stigma sessile.
Fruits: Berry deep blue, globose, 8-11 mm. long.
Accepted Name:
Berberis nervosa Pursh
Synonyms:
Berberis nervosa Pursh var. mendocinensis J.B. Roof
Mahonia nervosa (Pursh) Nutt.
Mahonia nervosa (Pursh) Nutt. var. mendocinensis (J.B. Roof) J.B. Roof
Odostemon nervosus (Pursh) Rydb.

Treated in Flora of the PNW as:
Additional Resources:

PNW Herbaria Specimens: View list of all Berberis nervosa specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Berberis nervosa specimens in the WTU Herbarium database.

Washington Flora Checklist: Berberis nervosa treatment.

E-Flora BC: Berberis nervosa atlas page.

CalPhotos: Berberis nervosa images.

USDA Plants Database: Berberis nervosa.
Additional photographs of Berberis nervosa:
(click on a thumbnail to view larger photo)

Jim Riley

Clayton J. Antieau

Ben Legler, 2005

Ben Legler, 2005

Ben Legler, 2005

Ben Legler, 2005

H. Tim Gladwin, 1989

Bud Kovalchik

Bud Kovalchik

Tim Hagan, 2005

Paul Slichter, 2005

Paul Slichter, 2005

Paul Slichter, 2005

G. D. Carr, 2006

G. D. Carr, 2006

G. D. Carr, 2002

G. D. Carr, 2008

G. D. Carr, 2008

G. D. Carr, 2008

G. D. Carr, 2008

G. D. Carr, 2008

M. A. Carr, 2004

Marcia Mellinger, 2004

Ray Izumi, 2009

Ray Izumi, 2010

Ray Izumi, 2010

Ray Izumi, 2010

Susan McDougall, 2004

Susan McDougall, 2014

Susan McDougall, 2014

Gary Brill, 2015

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Roger T. George, 2016

Roger T. George, 2016
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Washington Native Plant Society
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