Vascular Plants - Rhamnaceae - Frangula:
Frangula purshiana
Page Authors: David Giblin, Don Knoke
buckthorn 
Blooms: April-June
Habit: tree
Duration: perennial
Origin: Native
Conservation Status: Abundant; of no concern.

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Montana and Idaho.
Habitat: Forest understory and margins from low to moderate elevations in the mountains.
Species Description:

General: Deciduous shrub or small tree up to 10 m. tall, yellow- or brownish-puberulent.
Leaves: : Leaves alternate, with stout petioles 5-20 mm. long, the blades oblong-ovate to oblong-obovate, 6-13 cm. long, very finely serrulate, with 10-12 prominent, lateral veins on each side.
Flowers: Flowers in umbels on axillary peduncles, perfect or imperfect (if imperfect, the plant monoecious); calyx bell-shaped, 5-lobed, 3-4 mm. long, greenish, lined with a thin disk to which the petals and stamens are attached; petals 5, small, hooded; stamens 5, nearly sessile; ovary superior, free of the disk.
Fruits: Berries purplish-black, 6-9 mm. long.
Accepted Name:
Frangula purshiana (DC.) Cooper
Synonyms:
Rhamnus purshiana DC.

Treated in Flora of the PNW as:
Additional Resources:

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

WTU Herbarium Specimens: View list of Frangula purshiana specimens in the WTU Herbarium database.

Washington Flora Checklist: Frangula purshiana treatment.

E-Flora BC: Frangula purshiana atlas page.

CalPhotos: Frangula purshiana images.

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

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Clayton J. Antieau, 1989

Clayton J. Antieau, 2004

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Sandie Durand, 2008

G. D. Carr, 2008

G. D. Carr, 2008

G. D. Carr, 2008

G. D. Carr, 2008

G. D. Carr, 2008

G. D. Carr, 2008

Warren Walker, 2009

Warren Walker, 2009

Warren Walker, 2009

Rod Gilbert , 2006

Susan McDougall, 2004

Susan McDougall, 2004

Susan McDougall, 2004

Brian Luther, 2015

Brian Luther, 2015

Brian Luther, 2015

G. D. Carr , 2014

G. D. Carr , 2014

Brian Luther, 2016

Brian Luther, 2016

Brian Luther, 2016

Sandie Durand, 2012

Sandie Durand, 2011

Sandie Durand, 2012

Sandie Durand, 2010

Sandie Durand, 2009

Sandie Durand, 2008

Sandie Durand, 2008

Sandie Durand, 2008

Sandie Durand, 2010

Sandie Durand, 2015

Sandie Durand, 2012

Lief Larson, 2016

Lief Larson, 2016

Lief Larson, 2016

Lief Larson, 2016

Roger T. George, 2016

Roger T. George, 2016
(password required)

Burke Museum


©2017 Burke Museum of Natural History and Culture.
All Rights Reserved. Box 353010, University of Washington,
Seattle, WA 98195-3010, Phone: 206-543-5590.
On the UW campus at 17th Avenue NE and NE 45th Street.
Washington Native Plant Society
WA Native Plant Society