General:
Annual herb from a slender taproot; stems erect, simple or branched above, 25-70 cm tall, sometimes hairy below, usually glabrous above.

Leaves:
Basal leaves commonly deciduous by flowering time; stem leaves pinnately cut and mostly somewhat dissected, the middle and upper ones not clasping.

Flowers:
Racemes elongate, spikelike; petals white, about 3 mm long.

Fruits:
Silicles, oblong egg-shaped, 5-6 mm long, about 4 mm wide, glabrous, margins somewhat winged and upturned, slightly notched on strongly ascending to appressed stalks; stalks shorter than silicles, nearly round in cross section to slightly flattened; sinuses 0.2-0.4 mm deep; beaks slightly shorter than the sinus margins.

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