Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; southern British Columbia to California, also from Arizona and Texas northeastward to northeastern North America.
Habitat: Reservoirs, lakes, ponds, and slow-moving streams.
Conservation Status: Not of concern
Glabrous aquatic perennial.
Leaves rounded, cordate-based, shallowly toothed, floating, purple beneath and sometimes purple-spotted above; leaves with long petioles.
Flowers usually solitary on long, naked peduncles; calyx 5-lobed; corolla yellow, 5-lobed, the lobes fringed and shallowly notched; stamens 5, borne on the corolla and alternate with the lobes; pistil 1, ovary 1-celled.
Capsule egg-shaped, firm-walled.