Annual. Stems erect, ridged, 15-30 cm tall, with papillate to reflexed hairs. Lvs simple, pinnatifid, becoming toothed above, ciliate, narrow-oblanceolate to linear, acute at apex, narrowed to stalk-like base. Infl. a corymb or compact raceme, elongating at fruiting; pedicels spreading, hairy on upper surface, 0.5-1 cm long. Sepals glabrous to sparsely hairy, green or pinkish with scarious margins, c. 2 × 1.5 mm. Petals white; 2 anterior petals 4-6 × 1.5-2.5 mm; 2 posterior petals 1-2 × c. 1 mm. Silicle elliptic, 4-7 × 3-6 mm; valves finely veined, with broad acuminate wings forming an acute apical notch. Style 1-1.5 mm long. Seeds ovoid, brown, flattened, narrowly winged, c. 3 mm long.