Annual, 15-60 (-70) cm tall, simple or sparsely branched, ± hairy with simple hairs, sometimes glabrous. Basal and lower leaves, lyrate-pinnatifid, stalked, 3-4-jugate, 30-80 mm long, 10-30 mm broad; terminal lobe ovate, short, obtuse, 3-5-lobulate, irregularly toothed; lateral lobes narrowly ovate, ± confluent, alternate, toothed; upper leaves few, distant, smaller, but ± similar to the lower. Racemes 30-70-flowered, up to 30 cm long in fruit. Flowers c. 2 mm across, yellowish-white or pale yellow; pedicels very short, 1-2(-3) mm long in fruit, thickened, ascending, straight. Sepals 2-2.5 mm long, Petals 2.5-2.7 mm long, 1 mm broad. Stamens c. 2: 2.5 mm long; anthers c. 0.5 mm long. Siliquae 20-40 mm long, 1 mm broad, erect, linear, subterete, tapering upwards, glabrous, subtorulose; style inconspicuous, with a short depressed stigma; valves submembranous with a distinct mid-vein and faint side veins; septum hyaline with an obscure mid-vein; seeds 15-25 in each locule, c. 1 mm long, ellipsoid, brownish.