General:
Annual or biennial herb from a taproot; stems simple to freely branched, (10) 20-60 cm tall, usually somewhat short-hairy or hairy below, glabrous and glaucous above.

Leaves:
Leave of 2 distinct types; basal leaves 2- to 3- times pinnately cut into linear segments, to 10 cm long, long-stalked; lower stem leaves usually similar; middle and upper leaves suborbicular, deeply heart-shaped and clasping with slightly overlapping lobes, thus appearing as if the stem passes through the leaf.

Flowers:
Flower stalks slender, round in cross section, usually somewhat longer than the silicles; petals pale yellow, about 1.5 mm long (half length of sepals), narrowly spoon-shaped.

Fruits:
Silicles, spreading, suborbicular, 3-4 mm long and wide, glabrous or rarely slightly hairy, barely winged at the tips, slightly notched; sinuses about 0.2 mm deep; beaks about equalling the sinus.

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