Annual, 5-15 (-25) cm tall, erect, branched, glabrous, glaucous; branches filiform, rigid. Basal leaves ovate-oblong, sessile, withering; lower leaves oblong-ovate, 20-35 mm long, 5-20 mm broad, sessile, auricled at base, semiamplexicaul, entire or subentire, with rounded or obtuse apex; upper leaves 5-20 mm long, 2-10 mm broad, ovate-cordate, semiamplexicaul, entire with rounded or obtuse apex;all leaves glabrous, glaucous, subfleshy. Racemes 10-20 (-25)-flowered, lax, ebracteate, up to 10 cm long in fruit. Flowers small c.2 mm across, yellowish or dull whitish-lilac; pedicel up to 4 mm long in fruit, filiform, spreading or somewhat deflexed. Sepals c. 1 mm long. Petals c. 2 mm long, oblong-obovate, apex rounded. Stamens c. 0.7:1 mm long; anthers c. 0.25 mm. Siliculae oblong-pyriform or lamp-shaped (ovate with short, narrow, oblong upper half), 4-5 mm long, c. 2 mm broad, glabrous or hairy, apex truncate and subemarginate; valves usually covered with short glandular hairs, especially on the locules; wing very narrow, uniformly wide, ± thickened; seed c. 2 mm long, 1 mm broad, ellipsoid, reddish-brown.