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Biennial or short-lived perennial herb from a slender taproot and a usually simple stem-base; stems simple or branched, 3-32 cm tall, hairy below mainly with crosslike hairs, commonly glabrous above.
Basal leaves 10-25, 0.4-3 cm long, 1.5-9 mm wide, in a rosette, egg-shaped to oblanceolate, slightly minutely toothed or entire; stem leaves absent or 1-2 or sometimes as many as 4, elliptic to widely lanceolate, toothed or entire, 0.3-1.6 cm long, 2-10 mm wide; upper leaf surfaces with simple and short-stalked 2-branched, 3-branched, and crosslike hairs (mostly 2-branched or crosslike); undersurface of leaves with short-stalked 2-branched and crosslike hairs.
Racemes 2- to 15-flowered, open, often compound; flower stalks 3-15 mm long, commonly glabrous, seldom hairy, ascending; petals 3-3.5 mm long, yellow; sepals 1.5-2.5 mm long, soft-hairy or glabrous.
Silicles 10-20 mm long, 1.5-2 mm wide; narrowly elliptic to narrowly egg-shaped, plane, glabrous or rarely hairy; style to 0.1 mm long; seeds 16-40, oval, light brown, 1 mm long. vol2_4
Source: The Illustrated Flora of British Columbia