Page author: David Giblin
Crataegus douglasii
black hawthorn, Douglas's hawthorn
WTU specimens
Other herbaria

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Saskatchewan, Idaho and Montana, also in the Great Lakes region.

Habitat: Thickets, open forests, forest edges, and riparian zones, from lowlands to middle elevations.

Flowers: May-June

Origin: Native

Conservation Status: Not of concern

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.
Publication: Edwards\\\'s Bot. Reg. 8: pl. 1810. 1836.

Synonyms & Misapplications:
Crataegus columbiana Howell [HC, Peck]
Crataegus columbiana Howell var. columbiana [HC]
Crataegus douglasii Lindl. var. douglasii [HC]
Additional Resources:

PNW Herbaria: Specimen records of Crataegus douglasii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Crataegus douglasii checklist entry.

E-Flora BC: Crataegus douglasii atlas page.

CalPhotos: Crataegus douglasii photos.

USDA Plants: Crataegus douglasii information.

74 photographs:
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