Page author: David Giblin
Geum rivale
purple avens, water avens
WTU specimens
Other herbaria

Distribution: British Columbia and Okanogan County, Washington, east to Alberta, south in the Rocky Mountains to New Mexico.

Habitat: Stream banks, lake shores, bogs and wet meadows, at high elevations.

Flowers: Late June - July

Origin: Native

Conservation Status: Sensitive in Washington (WANHP)


Pubescent, herbaceous perennial from scaly rhizomes, the flowering stems 4-6 dm. tall.


Leaves mostly basal, several, lyrate-pinnatifid, up to 3 dm. long, the leaflets once or twice serrate, the three terminal leaflets much larger than the others; cauline leaves 3-5, reduced, pinnatifid below to deeply 3-lobed above.


Inflorescence open, 3- to 7-flowered, nodding in bud; calyx broadly cup-shaped, reddish-purple, the 5 lobes lanceolate and pointed, erect, 10 mm. long, alternating with 5 small, simple bracteoles; petals 5, yellow to pinkish, 2-3 mm. shorter than the sepals; stamens about 100; pistils numerous, the styles strongly bent and jointed.


Achenes elliptic, 3-4 mm. long, stiff-hairy, the lower joint of the style 6-8 mm. long, hooked at the tip, the upper joint 3-4 mm. long, deciduous.

Accepted Name:
Geum rivale L.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Geum rivale in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Geum rivale checklist entry.

E-Flora BC: Geum rivale atlas page.

CalPhotos: Geum rivale photos.

USDA Plants: Geum rivale information.

5 photographs:
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