Annual, 30-50 cm tall, often unbranched above, erect, minutely hairy on the stem or + downy with long downwardly curved, appressed simple hairs on raised bases. Basal leaves lyrate or pinnately lobed with large rounded terminal lobe and numerous much smaller lateral lobes, up to 8 cm long, rough with short bristles; middle and cauline leaves simple, sharply toothed and ciliate; uppermost linear, c. 15 mm long, 2 mm broad. Flowers similar to the previous species but petals always present and longer than sepals. Siliculae 3-(-4) mm long, 2.5-3(-3.5) mm broad, almost orbicular with a broad but shallow notch towards the aepx including almost sessile stigma within it.

Fl. Per.: April June.

Type: Described from Virginia, Jamaica.

Distribution: Native of N. America, introduced in Europe and other cooler countries.