Shrub 0.5–2 m tall. Branchlets ribbed, dark grey to black, pilose. Pinnae 1–3 pairs, 10–30 mm long except 2–12 mm long on proximal pinnae of multijugate leaves; petiole 1–2 mm long; rachis 4–9 mm long; pinnules 3–10 pairs except 2–4 pairs on proximal pinnae of multijugate leaves, narrowly oblong, 4–10 mm long, 1–3 mm wide, flat or recurved to revolute, green, glabrous; gland on rachis at base of pinnae, sessile, absent from unijugate leaves, with additional glands usually on pinna-rachis at base of uppermost 1–4 pairs of pinnules. Inflorescences simple, 1 or 2 per axil; peduncles 10–20 mm long, glabrous; heads globular, 25–43-flowered, cream to pale yellow. Flowers 5-merous; sepals c. ⅚-united; petals 1-nerved. Pods 1.5–5 cm long, 6–9 mm wide, pilose to glabrous. Seeds ±transverse, c. 3 mm long.