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Perennial herb from a slender taproot; stems erect or ascending with several ascending branches near the base, 25-70 cm tall, appressed-hairy.
Basal leaves egg- or spoon-shaped; stem leaves 10-20 mm long, 3-6 mm wide, lanceolate or oblanceolate, grey with starlike hairs.
Inflorescence elongate, flowers less than 2-3.5 mm in diameter; flower stalks spreading, 2-5 mm long; petals yellow, very narrow, 2-3 mm long; sepals about 2 mm long, soft-hairy and with starlike hairs, deciduous shortly after fruiting.
Silicles, 2-5.5 mm long, obtuse, nearly glabrous or hairy, the hairs starlike, strongly flattened; seeds 1 in each chamber; style about 0.5-2 mm long.
Source: The Illustrated Flora of British Columbia