Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the northern and central Rocky Mountains.
Habitat: Subalpine ridges and meadows.
Conservation Status: Not of concern
Short-lived perennials, crown not woody; stems simple from caudex branches, 10-45 cm tall, glabrous throughout.
Basal leaves oblanceolate, 1.5-6 mm broad, margins entire, ciliate at petiole base with trichomes to 0.8 mm, slightly pubescent above and beneath, stalkless trichomes to 0.4 mm with 3 or 4 rays; cauline leaves 5-17, commonly hiding stem towards the base, lobe-like appendages near base 1-3 mm, surfaces becoming glabrous towards ends of stems.
Inflorescence 10-25 flowered, unbranched racemes; fruiting pedicels erect, not curved, 5-10 mm, glabrous, not secund; flowers erect; sepals 4, glabrous; petals 4, purple, 6-9 mm long and 1.5-2.5 mm broad, glabrous; pollen spheroid.
Siliques 3.5 to 6.5 cm long and 1.8-2.5 mm broad, erect, appressed to rachis, not curved, with parallel edges; valves glabrous; seeds in 2 series or nearly so, 1.8-2.2 mm long and 1-1.8 mm broad, with a continuous wing to 0.5 mm broad.