Annual, 5-20 cm tall, erect, simple or branched from below, glabrous, Basal leaves in loose rosette, obovate, spathulate, apex rounded, shortly stalked, 1.5-3 cm long, 1-1.5 cm broad; upper leaves lanceolate, ovate, cordate, amplexicaul; all leaves glabrous, ± glaucous, entire or slightly toothed. Racemes 15-30-flowered, up to 15 cm long in fruit. Flowers c. 2.5 mm across, white; pedicels up to 8 mm long in fruit, spreading. Sepals c. 1.5 mm long, 1 mm broad. Petalss c. 2.5 mm long, 1 mm broad. Stamens c. 1.2: 1.5 mm long. Siliculae 4-6 mm long, 3-5 mm broad, obcordate-orbicular; wings narrow, smooth, not veined; stigma subsessile at the base of the apical notch; septum c. 2 mm wide; seeds 2-3 in each locule, c. 1.5 mm long, ellipsoid, yellowish-brown.