Annual, 5-45 cm tall, erect, branched, apparently glabrous, glaucous, somewhat hairy above with short, simple hairs. Basal leaves few, oblanceolate or oblong-elliptic, 30-60 mm long, 7-20 mm broad, sessile or subsessile, entire or subentire, obtuse; upper leaves oblong-lanceolate, 5-40 mm long, 1.5-20 mm broad, distant, auricled at base, amplexicaul, obtuse or acute, entire or subentire; all leaves glabrous, glaucous, subfleshy. Racemes 20-30-flowered, ebracteate, up to 15 cm long in fruit. Flowers 3-4 mm across, yellow; pedicel 3-6 mm long in fruit, spreading or deflexed, ± hairy. Sepals 2-2.5 mm long, c. 1 mm broad, oblong, obtuse, ± hairy. Petals 4-4.5 mm long, c. 1.5 mm borad, obovate-oblong, apex obtuse. Stamens c. 2.5:3 mm long; anthers c. 0.5 mm. Siliculae lampshaped or lancoelate with broad, ± ovate base and oblong apex, 7-9 mm long, 2.5-3 mm broad, hairy; wing narrow, often ± ciliate with short simple white hairs; locule wall usually with short, subglandular hairs, rarely glabrous; seed c. 2 mm long, 1 mm broad, oblong-ellipsoid, brown.