Annual or biennial, up to 45 cm tall, erect, glabrous or hairy with simple or branched hairs. Basal leaves rosulate, very variable, usually pinnatifid (lyrate to almost entire), 5-8-jugate, shortly stalked, usually up to 8 cm long, 2 cm broad; cauline leaves smaller, sessile. ± auricled and clasping the stem. Racemes many flowered, up to 30 cm long in fruit. Flowers c. 2.5 mm across, white; pedicels up to 18 mm long in fruit, spreading. Sepals c. 1.5 mm long, l mm broad. Petals c. 2.5 mm long, 1 mm broad, obovate-oblong, cuneate. Stamens c. 1.5: 2 mm long. Siliculae obcordate- triangular, 5-9 mm long, 4-6 mm broad; valves usually with straight margins; apical notch wide, V-shaped ; style c. 0.5 mm long, hardly or not exceeding the notch; septum c. 1 mm broad, seeds 6-12 in each locule, c. 1 mm long, oblong-elliptic, pale brown.