Page authors: Don Knoke, David Giblin
Potentilla supina
bushy cinquefoil
WTU specimens
Other herbaria

Distribution: In scattered locations in Washington, mostly east of the Cascades; British Columbia south to Texas, east to northeastern U.S.

Habitat: Sandy stream banks, lake shores, and moist flats.

Flowers: June-July

Origin: Native

Conservation Status: Not of concern

Description:
General:

Annual or biennial from a taproot and simple or branched crown, the stem 4-7 dm. tall, glabrous below to stiff-hairy above, leafy throughout.

Leaves:

Leaves pinnate, the lower ones with 2-4 pairs of elliptic to oblong leaflets with rounded serrations, 1-3 cm. long, the upper sometimes ternate; stipules well-developed.

Flowers:

Flowers solitary on long peduncles from the leaf axils throughout the upper half of the plant; calyx stiff-hairy, 5-9 mm. broad, the 5 lobes ovate-triangular, 3-4 mm. long, erect; petals 5, yellow, obovate, about equal to the sepals; stamens usually 20, sometimes less; pistils numerous; style terminal, equaling the ovary.

Fruits:

Achenes 1.2 mm. long with a wedge-shaped thickening on one edge about the size of the rest of the fruit.

Accepted Name:
Potentilla supina L.

Synonyms & Misapplications:
(none provided)
Infraspecies:
ssp. paradoxa – bushy cinquefoil
Additional Resources:

PNW Herbaria: Specimen records of Potentilla supina in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Potentilla supina checklist entry.

E-Flora BC: Potentilla supina atlas page.

CalPhotos: Potentilla supina photos.

USDA Plants: Potentilla supina information.

21 photographs:
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