Distribution: In the Cascades, but not the Olympic Mountains, in Washington; British Columbia south to California, east to Idaho.
Habitat: Streambanks and moist meadows in the mountains.
Conservation Status: Not of concern
Perennial herb to 60 cm tall from creeping rhizomes.
Alternate, simple, broadly rounded, to 10 cm across.
White, with 4 petals; in clusters at stem tips.
Narrow capsules (siliques) to around 3 cm long.
Easily distinguished from our other Cardamine species by its simple broadly rounded leaves, white petals, and robust size.