Annual herb from a fibrous root; stems erect, 1-10 cm tall, glabrous.
Basal leaves erect, linear and awl-like, 1-5 cm long, about 1 mm wide, entire; stem leaves similar, few, reduced.
Inflorescences racemose, open; flower stalks 1-2 mm long, ascending to erect; petals white, 0.2-1 mm long; sepals green, 0.5-0.8 mm long, erect, glabrous.
Silicles, narrowly elliptic to broadly egg-shaped, 2-3 mm long, 1.5-2 mm wide, inflated, glabrous; beaks obsolete; seeds oblong, about 1 mm long, wingless.
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