Distribution: In the Olympic and Cascades mountains in Washington; British Columbia and Alberta south to Nevada, east to the Rocky Mountains.
Habitat: Rocky areas at high elevations in the mountains.
Conservation Status: Not of concern
Grayish, mat-forming perennial from a much-branched crown, the simple stems 6-15 cm. tall, the herbage with mixed pubescence u00e2u20acu201c long, soft, simple or forked, and shorter and freely branched.
Basal leaves 1-10 cm. long, ovate or obovate, pinnate or pinnatifid, the segments linear to narrowly obovate; petioles slender, at least as long as the blades, with long, stiff, simple hairs on the margins near the base; cauline leaves similar, alternate, several, reduced.
Inflorescence a bractless, flat-topped raceme, becoming elongate in fruit; pedicles ascending to erect; sepals 4, often purplish-tinged, soon deciduous; petals 4, spatulate, white to purplish-tinged, 4-8 mm. long; stamens 6; style 0.3-1 mm. long, stigma discoid.
Siliques linear-oblong, 5-11 mm. long and 1.5-2.5 mm. broad, glabrous, nearly terete; seeds in 1 series.