Annual, 20-60 cm tall, erect, branched, ± hispid below with 1-2 mm long usually deflexed hairs, subglabrous or glabrous above. Lower leaves subrosulate, 6-10 cm long, 1.5-3.8 cm broad, including 2.5-3.5 cm long petiole; lamina lyrate to oblong-ovate, irregularly dentate or sinuately dentate, apex rounded; middle leaves shortly petioled, ± ovate, sinuate dentate, acute; upper leaves much smal¬ler, 1-2 cm long, 2-8 mm broad, oblong, subsessile, cuneate, ± dentate. Racemes 20-40-flowered, lax, increasing up to 30 cm in fruit. Flowers 7-12 mm across, yellow; pedicel 3-8 mm long increasing up to 20 mm in fruit, thickened or not, often + deflexed, especially the lower ones. Sepals c. 5 mm long, 1.5 mm broad. Petals 9-12 mm long, 4 mm broad, obovate, clawed (claw 3-4 mm long). Stamens c. 5:7 mm long; anthers c. 2 mm long, oblong-ovate, slightly curved above. Siliquae 35-90 mm long, 1.5-2.5 mm broad, oblong, usually straight, subcylindrical, glabrous, ± torulose, including 3-5 mm long, 0-1-seeded, hardly or not tapering beak; valve with a distinct mid-vein; septum hyaline; seeds 10-25 in each locule, uniseriate, c. 0.7 mm in diam., globose, light brown with black hilum.