Small rigid much-branched shrub up to 1 m high; branches often somewhat zigzag, pale green to olive, terete, cano-puberulous and substriate. Stipules spinescent, in pairs, recurved, reddish-brown, up to 3.5 mm long. Leaves bipinnate, small: petiole up to 3 mm long, cano-puberulous, with a stalked reddish-brown gland up to 1 mm high just below the point of attachment of the pinnae; rhachillae up to 1.5 cm long, glabrous to cano-puberulous; 1 pinna pair per leaf; leaflets in 6-12 subopposite pairs, up to 3(4) x 1(1.3) mm, oblong or linear-oblong, obtuse or acute apically, sparingly to densely pubescent on the margins only or sometimes on the lower surface also, seldom glabrous throughout, usually with a small reddish-brown gland at the base of each leaflet. Inflorescences capitate, pedunculate, solitary in the axils of the leaves. Flowers hermaphrodite, 5-merous, sessile, in heads up to 7 mm in diameter; peduncles up to 8 mm long, cano-puberulous. Calyx divided almost to the base, segments 1-2 mm long, up to 1.2 mm wide, densely villous externally. Petals free except basally, up to 2.5(3) mm long, ±1 mm wide, linear-lanceolate to-oblong, glabrous. Stamens 10, filaments linear, free, the 5 opposite the petals short, the 5 alternating with the petals longer but scarcely exceeding the petals; anthers up to 0.8 mm long, with a minute deciduous apical gland. Ovary up to 2 mm long, 1.6 mm wide, shortly stipitate, densely villous; style glabrous; stigma truncate. Pods sessile, often clustered, chestnut-to reddish-or purplish-brown, up to 1.5 cm long and 1.5 cm broad, broadly falcate-ovate to semi-orbicular, compressed, the lower suture arched and winged, 1-seeded, indehiscent. Seeds chestnut-brown, compressed, up to 6.5 x 5 mm, subcircular-elliptic, smooth.
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