Erect much-branched glabrous shrub 1-2.5 m high. Branchlets angled, green, with margins normally scabridulous. Stipules normally caducous, inconspicuous. Phyllodes continuous with branchlets, trifariously decurrent and forming narrow wings 1-2 mm wide; free portion of phyllodes patent to inclined, linear to linear-lanceolate, narrowed towards the apex, straight to shallowly recurved, sometimes shallowly incurved, 1-4 (-6) cm long, 1-3 mm wide, coarsely to sharply pungent, subrigid, 5-nerved; midrib prominent; upper margin flat, 0.5-1 mm wide and 2-nerved; gland not prominent, to c. 1 cm above base. Inflorescences simple, 1 or 2 per axil; peduncles 5-15 mm long; heads globular, 28-32-flowered, golden. Flowers 5-merous; sepals united. Pods submoniliform, ±straight, to 8 cm long, 4-6 mm wide, thinly coriaceous-crustaceous. Seeds longitudinal, ±oblong, 4-5 mm long; aril facing base of pod.
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