Erect herb, up to 1.5 m high. Stems slightly winged. Leaves rounded or subacute at apex, linear to lorate, 10-30 x 1.0-5.5 mm. Elongated terminal racemes up to 200 mm long. Wing sepals 4.5-5.0 x 2.5 x 3.0 mm. Flowers pink or purple.
Flowers pink or purple, pedicels 2.5–3.5 mm. long, in elongated terminal racemes up to 20 cm. long with minutely pubescent or almost glabrous rhachis, small caducous bracts 0.8 mm. long and bracteoles 0.5 mm. long.
Leaves 10–30 x 1–5.5 mm., linear to lorate, usually sparsely minutely hairy, somewhat scabrid on the edges and upper surface, rounded or subacute at the apex, and usually mucronate.
Posterior sepal 2 mm. long; wing sepals 4.5–5 x 2.5–3 mm., obliquely ovate, glabrous except for minute cilia round the margin; anterior sepals 1.5 mm. long, connate.
Shrublet (or sometimes an annual herb ?) up to 1.5 m. tall with slender, minutely crisped-pubescent, slightly winged stems.
Upper petals 4 x 2 mm., irregularly obovate-spathulate; carina 4 x 1.8 mm., crest 1.5 mm. long.
Seeds 3 x 1.8 mm., oblong-elliptic; caruncle 0.8 mm. long, appendages very small or absent.
Capsule 5 x 4 mm., broadly elliptic, glabrous, marginal wing very narrow.
Stamens 8.