General:
Biennial or perennial from a stout taproot; stems erect, 0.4-1.2 m tall, simple below, branched above, glabrous, somewhat glaucous.

Leaves:
Basal leaves several, clustered, oblanceolate to elliptic-oblanceolate, long-stalked, toothed or wavy-margined, to 18 cm long, soft-hairy on the margins to sparsely soft-hairy with simple hairs; stem leaves lanceolate to elliptic, unstalked, with ear-like basal lobes, mostly entire, glabrous.

Flowers:
Racemes compound, numerous; flower stalks slender, conspicuously enlarged below flowers, usually reflexed; petals yellow, about 3.5 mm long, spoon-shaped.

Fruits:
Oblong to oblong-oblanceolate, 8-18 mm long, 5-7 mm wide, glabrous, blackish; fruiting stalks somewhat shorter than the silicles; seeds yellowish, ellipsoidal, about 3 mm long.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia