Annual, 30-60 cm tall, erect, branched, glabrous, rarely pilose. Lower leaves pinnatisect or lyrate-pinnate, 4-10 cm long, 2.5-3.5 cm broad, stalked to subsessile; uppermost leaves linear, sessile. Racemes much branched, each 20-30-flowered, ebracteate. Flowers small, c. 3 mm across, white or pinkish; pedicel 2-3 (-5) mm long in fruit, not thickened, ± ascending or subappressed. Sepals c. 1.5 mm long, 1 mm broad, oblong, obtuse. Petals c. 3 mm long, 1 mm broad, narrowed below, apex rounded. Stamens 6, c. 1.8 : 2.2 mm long; anthers minute. Siliculae 4.5-6 mm long, 3.5-5 mm broad, broadly elliptic to suborbicular, glabrous, narrowly winged and distinctly notched at the apex with short style included with-in; septum c. 1 mm broad; seed c. 3 mm long, 1 mm broad, brown.