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General:
Tufted perennial herb from an elongate rhizome and a branched stem-base, up to 10 cm or longer, mostly less than 5 mm in diameter, covered with withered and persistent leaf bases; stems 1.5-20 cm tall, few to numerous, simple, sparsely to densely hairy with branched and simple hairs.
Leaves:
Basal leaves linear to wedge-shaped or egg-shaped, 0.4-10 cm long, 1-15 mm wide, entire to pinnately divided, segments oblong to wedge-shaped, sparsely to densely hairy with fine, freely-branched hairs, stalks slender, conspicuously ciliate near the base with long, stiff, simple hairs; stem leaves several, reduced, nearly unstalked, lobes more linear.
Flowers:
Inflorescences head-like, elongating in fruit to 10 cm long; flower stalks ascending to spreading, 5-10 mm long, hairy with generally simple hairs; petals white to purplish-tinged, 5-7 mm long, 3-4 mm wide; sepals often pinkish- or purplish-tinged, 2-3 mm long, soft-hairy, deciduous just after anthesis.
Fruits:
Siliques, linear to narrowly oblong, tapering at both ends, 5-12 mm long, 1-2.5 mm wide, glabrous (rarely hairy), slightly flattened or nearly round in cross section; beaks 0.3-1.5 mm long; seeds about 2 mm long, wingless, 4-10.
Source: The Illustrated Flora of British Columbia
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