Shrublet (or sometimes an annual herb ?) up to 1.5 m. tall with slender, minutely crisped-pubescent, slightly winged stems. 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. 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. 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. Upper petals 4 x 2 mm., irregularly obovate-spathulate; carina 4 x 1.8 mm., crest 1.5 mm. long. Stamens 8. Capsule 5 x 4 mm., broadly elliptic, glabrous, marginal wing very narrow. Seeds 3 x 1.8 mm., oblong-elliptic; caruncle 0.8 mm. long, appendages very small or absent.