General:
Annual or biennial herb from a taproot; stems erect, leafy, 10-30 cm tall, essentially glabrous.

Leaves:
Leaves mainly of the stems, narrowly elliptic, more or less entire, sharp-pointed, essentially glabrous.

Flowers:
Inflorescence short, forming a dense rounded cluster; petals unlike, the lower or outer ones much larger than the 2 upper ones, mauve to purple, sometimes whitish.

Fruits:
Silicles, strongly compressed at right angles to the inner partitions, beaked, 1- to 2-seeded; segments keeled, wings prolonged upwards into triangular, long-pointed lobes equal to or exceeding the segments.

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