Thelypodium laciniatum

Stems erect, thick, with many erect branches. Leaves in basal rosette and lower stem leaves are short-petioled, thickish, divided pinnately, and drop by flowering. Upper leaves toothed to entire, pointed at tip. Flowers are dense on upper branches, petals linear, white or purplish, wrinkled. Seedpods flat, spreading outward from stem on straight stalks, 1–4 in. long, narrowed between seeds. Grows in basalt cliffs, rocky hills, at low to mid-elevations.