Annual taprooted herb. Stem erect, branching, bearing stiff reflexed hairs especially near base, or sometimes glabrous, 60-100 cm tall. Lvs glabrous or sparsely covered in coarse hairs, toothed. Lower lvs lyrate-pinnate, rarely 2-pinnatifid, 10-20 × 5-10 cm; terminal leaflet broadly ovate to triangular, shallowly to deeply 3-lobed, wider than rest of lf; lateral leaflets alternate, oblong to ovate, in (0)-1-4 pairs, the proximal ones usually shallowly toothed but rarely entire. Upper lvs petiolate, similar to lower but smaller, sometimes simple and 3-lobed. Racemes erect, to 40 cm long, glabrous or with sparse reflexed hairs. Pedicels patent to reflexed at fruiting, 10-20 mm long. Sepals ovate to obovate, glabrous, 3-6 × 1-1.5-(2) mm. Petals 7-11 × 3-5 mm. Silique (1)-3-6-(8)-seeded, ± constricted between the seeds, bearing bristly hairs especially on veins, rarely glabrous, 15-30 × 2-5 mm; beak strongly flattened, 0-1-seeded, = or > valves.