Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the western Montana.
Habitat: Wet places in subalpine and alpine regions.
Flowers: May-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bees, flies, beetles
Glabrous, succulent perennial with nearly naked stems up to 1.5 dm. tall.
Leaves mostly basal, long-petiolate, the blades sub-obicular to oblong-ovate, up to 10 cm. long, sub-entire to serrate or dentate; cauline leaves usually 1, petiolate
Flowers solitary on 1-2 naked peduncles; sepals 7-10, white, narrowly oblong-elliptic, 7-20 mm. long; petals none; stamens numerous, filaments 2-5 times longer than the anthers; pistils 5-10.
Follicles sub-sessile.
PNW Herbaria: Specimen records of Caltha leptosepala in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Caltha leptosepala checklist entry
OregonFlora: Caltha leptosepala information
E-Flora BC: Caltha leptosepala atlas page
CalPhotos: Caltha leptosepala photos