Stout erect branched annuals up to 60 cm high. Stems usually hispid with ± retrorse hairs, sometimes subglabrous. Lower leaves petiolate, upper leaves sessile, all leaves lyrate-pinnatifid or pinnatifid, 2-5-jugate, the lobes narrow, entire or lobulate; terminal lobe large, oblong to obovate. Racemes terminal, dense in flower, lax in fruit. Sepals 0-7-1 cm long, linear-oblong; the outer cucullate, horn-tipped. Petals 1 • 5-2 cm long, spathulate, long-clawed, net-veined with dark purple-brown. Filaments 7-5-8-5 and 9-5-11 mm long, subulate. Anthers 2-5-3 mm long. Nectaries below each pair of long filaments shortly tongue-shaped. Siliquae 1-2-3 cm long, 3-5 mm broad, erect on short, stout pedicels; valves elliptic, 1-nerved, glabrous or hispid; beak lanceolate or ensiform, flat, at least half as long as the valves. Seeds 1 • 5-2 • 5 X 1 -2-2-2 mm, smooth, yellowish to reddish, 4-10 in each locule.
