Caltha biflora
broad-leaved marsh-marigold, twin-flowered marsh-marigold

Distribution: Occurring chiefly west of the Cascade crest in Washington; Alaska to California, east to western Nevada.

Habitat: Open wet area in subalpine and alpine marshes and seepages.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Stems erect, 0-1 leaves.


Basal leaves orbiculate-reniform to oblong. Margins mostly entire, sometimes crenate to dentate.


~15-40 millimeters in diameter. Sepals colored faintly, white to yellow. Sepals abaxially blue to dark violet.


Follicles; 4-15 linear-oblong bodies, style and stigma straight or curved slightly. Seeds elliptic. ~2 millimeters long

Accepted Name:
Caltha biflora DC.
Publication: Syst. Nat. [Candolle] 1: 310. 1817.

Synonyms & Misapplications:
Caltha biflora DC. var. biflora [HC]
Caltha howellii (Huth) Greene
Caltha leptosepala DC. ssp. biflora (DC.) P.G. Sm.
Caltha leptosepala DC. ssp. howellii (Huth) P.G. Sm. [KZ99]
Caltha leptosepala DC. var. biflora (DC.) G. Lawson
Additional Resources:

PNW Herbaria: Specimen records of Caltha biflora in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Caltha biflora checklist entry.

OregonFlora: Caltha biflora information.

E-Flora BC: Caltha biflora atlas page.

CalPhotos: Caltha biflora photos.

USDA Plants: Caltha biflora information.

25 photographs:
Group by