Page authors: David Giblin, Don Knoke
Rubus bifrons
European blackberry, Himalayan blackberry
WTU specimens
Other herbaria

Distribution: British Columbia south to California and eastward throughout the intermountain west; sporadically in central and eastern North America.

Habitat: Disturbed areas, riparian zones, and forest edges at low elevations.

Flowers: May-July

Origin: Introduced

Conservation Status: Not of concern

Description:
General:

Strong, more or less evergreen perennial, the stems up to 10 m. long, ascending to sprawling, armed with strong, flattened prickles.

Leaves:

Leaves mostly 5-foliate, the leaflets broadly oblong to ovate, short acuminate, 6-12 cm. long, sharply serrate, bright green and glabrous above, grayish-woolly beneath.

Flowers:

Inflorescence a flat-topped panicle; calyx woolly, the 5 segments reflexed, lanceolate, 8-12 mm. long; petals 5, white to reddish tinged, oval-obovate, 10-15 mm. long; stamens 100 or more; pistils many, the style slender, glabrous.

Fruits:

Drupelets coherent, and with the fleshy receptacle forming a nearly globose blackberry 1.5 cm. thick.

Accepted Name:
Rubus bifrons Vest
Publication: Steiermark. Z. 3: 163. 1821.

Synonyms & Misapplications:
Rubus discolor Weihe & Nees, misapplied [HC]
Rubus procerus P.J. Müll. ex Boulay, misapplied
Rubus thyrsanthus Peck
Additional Resources:

PNW Herbaria: Specimen records of Rubus bifrons in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Rubus bifrons checklist entry.

E-Flora BC: Rubus bifrons atlas page.

CalPhotos: Rubus bifrons photos.

USDA Plants: Rubus bifrons information.

15 photographs:
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