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General:
Annual herb from a taproot; stems 10-50 cm tall, simple to freely branched, glabrous.
Leaves:
Basal leaves few, shed early, oblanceolate, 2-6 cm long, 1-2 cm wide, sinuate to almost lyrate, narrowed to short stalks, glabrous; upper stem leaves unstalked, with earlike lobes at the bases, lanceolate to oblanceolate, toothed to wavy-margined and lobed, glabrous.
Flowers:
Flower stalks widely spreading to upcurved, 7-15 mm long, slender; petals white, 3-4 mm long; sepals 1.5-2.2 mm long, glabrous.
Fruits:
Silicles, oval to nearly heart-shaped, 10-17 mm long, 9-15 mm wide, strongly obcompressed, slightly notched, sinus 1.5-2.5 mm deep, wing-margined all around; beaks 0.1-0.2 mm long; seeds about 2 mm long, concentrically corrugated.
Source: The Illustrated Flora of British Columbia
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