Distribution: Occurring in the the Olympics and Cascades Mountains in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: From subalpine meadows and forest openings to alpine meadows.
Conservation Status: Not of concern
Annuals, biennials, or perennials; base unbranched or with poorly developed branching, uncommonly scapose; stems generally 0.5-3 dm, branched towards ends, pubescent near base, usually distally glabrous, with simple trichomes and occasionally some 2-rayed trichomes on stalks.
Basal leaves form rosettes; petioles short, up to 0.5 cm, ciliate; blade typically somewhat lanceolate, approximately 1-2.8 cm long and 2-6 mm broad; margins entire or finely toothed, ciliate with simple trichomes; usually pubescent above and beneath, rarely glabrous beneath, upper surface with stalked trichomes with 2-4 rays and uncommonly with simple trichomes along midvein, lower surface with simple trichomes and sometimes 2-rayed trichomes; cauline leaves generally 1-3, lanceolate to ovate, margins entire or finely toothed, pubescence same as basal leaves.
Inflorescence racemose, usually 6-30 flowered, without bracts, becoming elongated when in fruit; rachis straight, generally rigid, glabrous; fruiting pedicels spreading-ascending or horizontal, usually not curved, slightly shorter than fruit, commonly glabrous; sepals 4, ovate, 1.4-2.1 mm, glabrous or slightly pubescent with simple trichomes; petals 4, yellow, narrower at base, 2-3.2 mm long and 0.7-1.2 mm broad; anthers less than 0.25 mm, ovate.
Siliques lanceolate to linear, plane, flat, 6-12 mm long and 1.4-2.1 mm broad, valves not pubescent; ovaries generally containing 24-38 ovules; seeds oblong, 0.7-1 mm long and about half as wide.