Vascular Plants - Berberidaceae - Berberis:
Berberis aquifolium
Page Authors: Don Knoke, David Giblin
holly-leaf Oregon-grape, shining Oregongrape, tall Oregongrape, Oregon grape 
Blooms: March-May
Habit: shrub
Duration: perennial
Origin: Native
Conservation Status: Abundant; of no concern.

Distribution: Widely distributed throughout Washington; southern British Columbia south to Northern California, east to northern Idaho and western Montana.
Habitat: Sagebrush slopes and open woods.
Species Description:

General: Erect, stiff-branched, evergreen woody shrub 1.5-20 dm. tall, occasionally stoloniferous.
Leaves: Leaves alternate, pinnate, leathery; leaflets 5-9, oblong to ovate or ovate-lanceolate, 3-8 cm. long and 2-5 cm. broad, pinnately nerved from the mid-vein, glossy above, with 12-29 spiny teeth.
Flowers: Inflorescence of several bracteate racemes 3-8 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 with 2 divergent teeth at the tip; style none, stigma sessile.
Fruits: Berry deep blue, glaucous, globose-ellipsoid, 7-14 mm. long.
Accepted Name:
Berberis aquifolium Pursh
Synonyms:
Berberis aquifolium Pursh var. aquifolium
Berberis nutkana
Mahonia aquifolium (Pursh) Nutt.
Odostemon aquifolium (Pursh) Rydb.

Treated in Flora of the PNW as:
Additional Resources:

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

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

Washington Flora Checklist: Berberis aquifolium treatment.

E-Flora BC: Berberis aquifolium atlas page.

CalPhotos: Berberis aquifolium images.

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

Ben Legler, 2004

Ben Legler, 2004

Jim Riley

M. R. Smith

Dana Visalli

Ben Legler, 2005

Ben Legler, 2005

Ben Legler, 2005

H. Tim Gladwin, 1990

H. Tim Gladwin, 1996

H. Tim Gladwin, 1993

H. Tim Gladwin, 1987

Bud Kovalchik

Shaun Hubbard, 2005

Shaun Hubbard, 2005

Shaun Hubbard, 2005

Richard Old

Richard Old

Tim Hagan, 2003

Paul Slichter, 2005

Paul Slichter, 2005

G. D. Carr, 2007

G. D. Carr, 2007

G. D. Carr, 2007

G. D. Carr, 2007

Rod Gilbert , 2005

Rod Gilbert , 2003

Al Dodson, 2008

Walter Siegmund, 2011

Walter Siegmund, 2011

Walter Siegmund, 2011

Walter Siegmund, 2011

Harry Thomas, 2011

Harry Thomas, 2010

Douglas Houck, 2012

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Roger T. George, 2015

Susan McDougall, 2014

Julia Bent, 2013

Julia Bent, 2013

Julia Bent, 2013

Ron Bockelman, 2015

Ron Bockelman, 2015

Ron Bockelman, 2015

Ron Bockelman, 2015

Ron Bockelman, 2015
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Washington Native Plant Society
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