Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, and from the central U.S. and eastern Canada to the Atlantic Coast; circumboreal.
Habitat: Shrub-steppe, grasslands, and open disturbed areas at low to middle elevations.
Origin: Introduced from Europe
Growth Duration: Annual
Conservation Status: Not of concern
Small annual herb 5-20 cm tall.
All basal, simple, narrow, with weak teeth on margin and stellate hairs on surface.
White, small, with 4 deeply notched petals; in racemes at top of stems.
Elliptic capsules (siliques).
One of the earliest species to bloom in spring; plants are small; leaves all basal with branched hairs; flowers white with 4 deeply notched petals.