Page authors: Don Knoke, David Giblin
Rosa pisocarpa
clustered rose, peafruit rose

Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; southern British Columbia to California.

Habitat: Thickets, stream banks, and swampy places at lower elevations.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bumblebees, bees, beetles


Deciduous shrub 1-2 m. tall, prickly to nearly unarmed, the prickles straight, the stem not bristly.


Leaves alternate, pinnate, puberulent on the lower surface, not glandular; leaflets 5-9, elliptic to ovate, 1.5-4 cm. long and 0.7-2 cm. wide, finely serrate.


Flowers small, in flat-topped cymes terminating the branches of the season, seldom solitary; calyx lobes 5, 1-1.5 cm. long and 2.5-3.5 mm. wide at the base, constricted in the middle, with coarse, stalked glands on the back; the calyx tube glabrous and bluish-glaucous, 3-5 mm. thick; petals 5, 1.2-2 cm. long, pink; stamens and pistils numerous.


Hips purplish, globose or ellipsoid, 6-12 mm. long and thick, the achenes numerous, 3 mm. long, stiffly long-hairy along one side.

Accepted Name:
Rosa pisocarpa A. Gray
Publication: Proc. Amer. Acad. Arts 8: 382. 1872.

Synonyms & Misapplications:
Rosa anacantha Greene
Rosa pringlei Rydb.
Additional Resources:

PNW Herbaria: Specimen records of Rosa pisocarpa in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Rosa pisocarpa checklist entry.

OregonFlora: Rosa pisocarpa information.

E-Flora BC: Rosa pisocarpa atlas page.

CalPhotos: Rosa pisocarpa photos.

USDA Plants: Rosa pisocarpa information.

39 photographs:
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