Fastigiate glabrous shrub 2–3 m high. Ultimate branchlets ascending to erect, rather straight and sparingly divided, terete, finely striate, ash-grey with an often flaking cuticle, pale green when young, coarsely spinose. Phyllodes inconspicuous, sparse, erect, frequently shed (especially upon collection), terete, 8–18 mm long, 1 mm wide, narrowed at base, acute, scarcely pungent, 4-veined. Inflorescences rudimentary normally 1-headed racemes with axes to c. 1 mm long; peduncles 5–10 mm long, often growing out at anthesis; heads globular, 28–35-flowered, golden; buds sometimes obloid. Flowers 5-merous; sepals variably united from near the base to c. ½-united, the lobes oblong to narrowly oblong. Pods submoniliform, to 15 cm long, 5–7 mm wide, thinly coriaceous, dark brown. Seeds longitudinal, ovate, sometimes oblong, 4–6 mm long, shiny, dark brown to blackish; aril dull yellow, waxy, as long as seed.
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