Vascular Plants - Rosaceae - Crataegus:
Crataegus douglasii
black hawthorn, Douglas' hawthorn 
Blooms: May - June
Habit: tree,shrub
Duration: perennial
Origin: Native
Distribution: Both sides of the Cascades, Alaska to California, east to Utah and Wyoming, and across the northern states to Michigan
Habitat: Moist to dry areas, lowlands to moderate elevations
Species Description:

General: Large shrubs or small trees, 1-6 m. tall, armed with stout, straight thorns 1-2 cm. long.
Leaves: Leaf blades obovate, tapered to the petiole, 3-6 cm. long and nearly as broad, weakly lobed, pubescent to glabrous on both surfaces.
Flowers: Flowers few in the leaf axils or terminal; calyx bell-shaped, the 5 lobes triangular, entire, reflexed, 1.5-2.5 mm. long; petals 5, white, orbicular, 5-7 mm. long; stamens 10, styles 5.
Fruits: Berry blackish, glabrous, about 1 cm. long.
Accepted Name:
Crataegus douglasii Lindl.
Synonyms:
Crataegus columbiana Howell var. columbiana
Crataegus douglasii Lindl. var. douglasii

Treated in Flora of the PNW as:
Crataegus douglasii
Additional Resources:

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

WTU Herbarium Specimens: View list of Crataegus douglasii specimens in the WTU Herbarium database.

Washington Flora Checklist: Crataegus douglasii treatment.

E-Flora BC: Crataegus douglasii atlas page.

CalPhotos: Crataegus douglasii images.

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

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2003

Ben Legler, 2003

Don Knoke, 2005

H. Tim Gladwin, 1991

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Ben Legler, 2006

Paul Slichter, 2008

Robert L. Carr, 2010

Robert L. Carr, 2010

Robert L. Carr, 2010

Robert L. Carr, 2010

Robert L. Carr, 2010

Robert L. Carr, 2010

Craig Althen, 2012

Susan McDougall, 2012

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Ron Bockelman, 2013

Chris Wood, 2014

Ron Bockelman, 2014

Ron Bockelman, 2014

Ron Bockelman, 2014

Ron Bockelman, 2014

Ron Bockelman, 2014

Ron Bockelman, 2014

Daniel McNair , 2015

Roger T. George, 2014

Brian Luther, 2015

Brian Luther, 2015

Brian Luther, 2015

Brian Luther, 2015

Brian Luther, 2015

Brian Luther, 2015

Brian Luther, 2015

Brian Luther, 2016

Roger T. George, 2016

Roger T. George, 2016

Roger T. George, 2016

Roger T. George, 2016

Roger T. George, 2016

Roger T. George, 2016
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Washington Native Plant Society
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