Perennial herb, 0.1-0.3 m high, taproot long. Stems prostrate or erect, with sickle-shaped hairs. Leaves: basal leaves rosulate, petiolate, pinnate, 8-10-jugate, covered with short, flattened hairs; cauline leaves pinnately lobed with fewer, narrower, less lobulate lobes, upwards becoming smaller; uppermost oblanceolate, 3-fid or entire. Inflorescence a terminal raceme; rachis puberulous. Sepals oblong, margins membranous. Petals absent. Nectaries filiform. Fruit a silicula, elliptical, shallowly emarginate. Seeds brown.