Erect annual, 30-90 (-200) cm tall, branched, + sparsely hairy below, glabrous above, with simple hairs. Lower leaves distinctly stalked, lyrate-pinnati¬fid, 2-3-jugate; margin irregularly and coarsely dentate; middle leaves ± simple, oblong-ovate, dentate; upper leaves oblong-linear, acute, narrowed at the base into a short stalk, entire or subentire. Racemes 20-40-flowered, lax, increasing up to 30 cm in fruit. Flowers c. 7 mm across, golden yellow; pedicel 5-8 mm long, increasing up to 15 mm in fruit, glabrous, ascending. Sepals 4-6 mm long, 1-1.5 mm broad, oblong, subequal, apex rounded or obtuse, yellowish, glabrous. Petals 6-9 mm long, 2.5-3 mm broad, obovate, clawed, apex rounded. Stamens 4-6:5-8 mm long; anthers about 2 mm long, obtuse with apex often curved. Siliquae 25-50 mm long, 2-3 mm broad, linear, subtetragonous, suberect, + torulose, narrowed into a 5-10 mm long seedless beak, glabrous; valve with a prominent mid-rib, yello¬wish; style 1.5-2.5 mm long with a short stigma; septum white, membranous. Seeds 10-20 in each locule, c. 1 mm in diam., globose, reddish-brown.