Annual or biennial, 30-150 cm tall, erect, branched, ± glabrous, glaucous; tap root about as thick as the stem, slender. Lower leaves often lyrate-pinnatisect, 5-25 cm long, 2-6 cm broad (rarely larger), sub-bijugate, stalked; terminal lobe largest, ovate, rounded at the apex, broadly crenate or dentate, subtruncate at the base; lateral lobes smaller, ovate; middle and upper leaves becoming gradually lanceolate, ± entire with a broadened cordate base clasping at least 1/2 of the stem, apex acute; all leaves glaucous. Racemes 15-40-flowered, laxly corymbose with buds overtopping the opened flowers. Flowers 10-15 mm across, pale yellow; pedicel 6-12 mm long, increasing up to 20 mm (rarely more) in fruit, spreading. Sepals 5-8 mm long, 1.5-2 mm broad, erect, glabrous, subequal. Petals 10-15 mm long, 3.5-6 mm broad, obovate, narrowed towards the base. Stamens 5-7: 7-9 mm long. Siliquae 40-80 (-100) mm long, 2.5-4 mm broad, linear, subtorulose, including a beak about half as long as the entire pod and usually 0-1 seeded, glabrous; valve with a prominent mid-vein; stipe rarely present; septum memb¬ranous, not veined; seeds 10-20 (rarely more) in each locule, globose, about 1.5 mm in diam., yellowish-brown, often blackish near the hilum, finely reticulate¬alveolate.