Distribution: Occurring on both sides of the Cascades in Washington; Alaska to California, east to Alberta, Montana and New Mexico.
Habitat: Bogs, stream banks and wet meadows, mid- to high elevations in the mountains.
Growth Duration: Perennial
Conservation Status: Not of concern
Glabrous, scapose perennial from a short, stout rhizome, the flowering stems 1-several, 1.5-3 dm. tall, with a cordate-clasping bract about mid-length on the scape.
Leaves all basal, entire, long-petiolate, the blades 2-4 cm. broad, reniform, usually broader than long, with prominent parallel veins.
Flowers terminal and single on long scapes, about 2 cm. broad; calyx fused to the ovary for about 1 mm., the 5 lobes ovate-oblong, 4-7 mm. long, the tip usually fringed; petals white, 8-12 mm. long, obovate, tapering at the base, the lower half fringed, the upper half entire.
Ovary mostly superior, capsule ovoid, 1 cm. long; carpels 4.