Annual, up to 20 cm tall, erect or suberect, branched mostly from the base, clothed with short branched or stellate appressed hairs. Leaves narrowly oblanceolate or oblong, rarely spathulate, sessile, 5-20 mm long, 1.5-4 mm borad, entire. Racemes 25-50-flowered, up to 10 cm long in fruit. Flowers c. 1.5 mm across, yellowish; pedicel up to 4 mm long in fruit, filiform, recurved. Sepals c. 1.5 mm long. Petals about as long as the sepals, linear-oblong, cuneate, apex subemarginate. Stamens c. 1.2: 1.5 mm long; filaments appendaged-dentate. Siliculae orbicular, suborbicular or broadly elliptic, very variable in size and hairiness, usually 4-5 mm in diam., biconvex; apex distinctly notched with a short, subsessile stigma; valves somewhat membranous, narrowly winged (margined), equally tumid, usually covered with simple, ± verruculose hairs, sometimes glabrous; seed 1, 1.5-2 mm in diameter.

Fl. Per.: May-June.

Type: Described from Italy, Herb. Linn.no.830/1 (LINN).

Distribution: C. and W. Europe, Mediterranean region, S.W. Asia, eastward to Pakistan.

A very polymorphic species with short and tall plants, smaller and larger fruits with densely hairy to glabrous valves.