Distribution: Distributed on both sides of the Cascades in Washington; British Columbia to California, east to the Rocky Mountains from Montana south to Colorado.
Habitat: Stream margins, wet meadows, pond shores, and other riparian areas.
Conservation Status: Not of concern
Erect to spreading perennial, with slender rhizomes 2 mm. thick, but 4 mm. thick at the base of the stems; flowering stems simple to branched, 2-6 dm. tall, mostly glabrous.
: Leaves glabrous, the few basal ones usually simple, the blade 1-3 cm. long, cordate or ovate; cauline leaves compound with 2-4 lanceolate to ovate lobes, the terminal one dentate-lobed.
Flowers in racemes, the pedicles ascending, 5-20 mm. long; sepals 4, 1.5-2.5 mm. long; petals 4, white, obovate, 3-7 mm. long; style 0.5-2 mm. long.
Siliques erect, 2-3 cm. long, 1-1.5 mm. broad.