Page author: David Giblin
Ranunculus orthorhynchus
straightbeak buttercup
WTU specimens
Other herbaria

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Montana and Utah.

Habitat: Streambanks and moist fields to mountain meadows and slopes.

Flowers: April-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Stiff-hairy perennial from thickened roots, the several stems branched, erect to decumbent, 2-6 dm. tall.

Leaves:

Leaves mostly basal, long-petiolate, the blades pinnately compound, usually with 5 irregularly toothed or lobed, pointed leaflets; cauline leaves alternate, the divisions deep, the ultimate segments linear.

Flowers:

Pedicels single-flowered, up to 15 cm. long; sepals 6-9 mm. long, with soft hairs, usually reflexed, often purplish-tinged, early-deciduous; petals 5, yellow, 9-18 mm. long; nectary scale glabrous, fan-shaped, 0.5-1 mm. long, the lateral margins attached along the lower third; receptacle spherical, up to 7 mm. long, hairy; stamens 50-70; pistils 20-50.

Fruits:

Achenes elliptic-obovate, compressed, 3.5 mm. long, smooth; stylar beak straight, 2.5-4 mm. long.

Accepted Name:
Ranunculus orthorhynchus Hook.
Publication: Fl. Bor.-Amer. 1: 21. 1829.

Synonyms & Misapplications:
(none provided)
Infraspecies:
var. orthorhynchus – straightbeak buttercup
var. platyphyllus – straightbeak buttercup
Additional Resources:

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

WA Flora Checklist: Ranunculus orthorhynchus checklist entry.

E-Flora BC: Ranunculus orthorhynchus atlas page.

CalPhotos: Ranunculus orthorhynchus photos.

USDA Plants: Ranunculus orthorhynchus information.

30 photographs:
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