Annual (rarely biennial) herbs with simple hairs, erect, branched. Leaves pinnatifid or deeply dissected, lower shortly petioled, upper sessile or almost so. Racemes many flowered, often bracteate below, increasing in length in fruits. Flowers usually large, yellow, pedicellate with pedicels ± spreading in fruit. Sepals subequal but not saccate at the base, oblong, subspreading. Petals obovate with claw usually shorter than the limb. Stamens 6; filaments linear. Lateral nectar glands abruptly prismatic, often bilobed; middle glands semiglobose. Ovary cylindrical, short, 4-17-ovuled; beak portion about as long or longer than ovary, about as broad and tapering towards the apex with sub-bilobed stigma. Siliquae short, subcylindrical or linear-cylindrical, few seeded; each valve 3-7 coarsely veined; beak often long, 0-9-seeded, coarsely 3 or more veined; septum submembranous, thick walled; seeds spherical, uniseriate, brown; cotyledons conduplicate.