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General:
Annual herb from a taproot; stems glabrous or sparsely hairy, glaucous, 20-40 cm tall, simple to freely branched.
Leaves:
Basal leaves slender-stalked, pinnately cleft with the terminal lobe the largest, 2-4 lateral lobes, the terminal lobe egg-shaped, wavy-toothed; lowermost stem leaves similar to the basal but ear-like at the bases and clasping or unstalked, upper oblong, narrowly egg-shaped or lanceolate, subentire.
Flowers:
In terminal clusters; flower stalks stout, ascending, 7-25 mm long; petals yellow, 6-8 mm long; sepals 3-4 mm long.
Fruits:
Siliques, ascending to spreading, 3-7 cm long, 2.5-3.5 mm wide, straight; styles beaked, 10-15 mm long; seeds 1.5 mm long, minutely honeycombed.
Source: The Illustrated Flora of British Columbia
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