Page authors: Don Knoke, David Giblin
Ranunculus populago
mountain buttercup

Distribution: In two discrete locations in Washington (Pierce County and Blue Mountains); Washington to California, east to Idaho and western Montana.

Habitat: Wet areas at mid- to high elevations in the mountains.

Flowers: April-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Sensitive in Washington (WANHP)


Tender, glabrous perennial from clustered, fleshy roots, the 1-several stems erect, 1-3 dm. tall.


Basal leaves long-petiolate, the blade cordate to ovate, entire to shallowly lobed, 2-5 cm. long and 1-5 cm. broad; cauline leaves alternate and short-petiolate below to sub-opposite and sessile above, ovate to elliptic-lanceolate.


Flowers 1-5 in the upper leaf axils, the pedicels up to 6 cm. long; sepals 5, greenish-yellow, 2-4 mm. long; petals 5, deep yellow, 4-7 mm. long; nectary scale glabrous, 0.7 mm. long, deltoid, the lateral edges attached full length; receptacle sub-globose, glabrous; stamens 15-30; pistils 7-25.


Achenes strongly compressed, 1.6-2 mm. long, smooth; stylar beak 0.7 mm. long, straight and slender.

Accepted Name:
Ranunculus populago Greene
Publication: Erythea. 3: 19. 1895.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Ranunculus populago in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Ranunculus populago checklist entry.

OregonFlora: Ranunculus populago information.

E-Flora BC: Ranunculus populago atlas page.

CalPhotos: Ranunculus populago photos.

USDA Plants: Ranunculus populago information.

26 photographs:
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