An erect more or less branched herb with a smooth stem, glabrous or, in the African plant, sparsely pilose, at least below. Radical leaves oblanceolate, pinnati-zpartite, with spreading, rather acute segments or subruncinate. Cauline leaves narrow-lanceolate, the teeth or segments towards the base usually larger and deeper, usually shortly petiolate. Racemes elongate, leafless. Flowers small. Siliquas elongate, very narrow-linear, rather flaccid at first and subtorulose, spreading, 1 1/2–2 in. or more in length, on pedicels of 1/4– 1/2 in. Seeds oblong, under a lens very minutely granulate.