Annual or biennial, 20-60 (-90) cm tall, erect, branched above, ciliately hairy with long, simple hairs, subglabrous above. Basal and lower leaves loosely rosulate, shortly petioled, runcinate-pinnatifid, 6-15 (-20) cm long, 3-8 cm broad; terminal lobe large, ovate, distantly lobulate, toothed to entire; lateral lobes (4-) 6-8 paired, narrowly oblong; upper leaves 5-7-jugate, with linear to filiform lobes. Racemes 15-25-flowered, up to 30 cm long in fruit, lax. Flowers 5-6 mm across, yellowish; pedicels (5-) 8-12 mm long in fruit, thickened, sub-spreading or ascending. Sepals 4-6 mm long. Petals (6-) 9-12 mm long, c. 4 mm broad, rarely much reduced. Stamens c. 5:7 mm long; anthers c. 2 mm long. Siliquae (50-) 80-100 mm long, 1-1.5 mm broad, linear-subcylindrical, slightly terete, usually straight, glabrous; valves somewhat rigid, 3-veined; style 1-2 mm long, thickened with ± bilobed, capitate-coronate stigma; septum submembranous, somewhat thickened between the seeds; seeds 40-60 in each locule, c. 1 mm long, ellipsoid, brown.