Much-branched shrub to c. 2 m high. Branchlets often flexuose. Stipules spinose to innocuous. Phyllodes continuous with branches, bifariously decurrent and forming opposite wings with each one extending to the next below; wings usually 2–20 mm wide, narrowest in inflorescence-bearing region, thinly coriaceous, green, glabrous to pilose or hirsute-hirsutellous, commonly tuberculate-scabridulous on margins; free portion of phyllodes 5–70 mm long, sometimes acuminate, with spinose to innocuous apex, with central vein obvious; glands prominent, 1–3, normally on a triangular spur. Inflorescences simple and mostly 2 per axil, sometimes in racemes; peduncles 4–12 mm long, glabrous or hirsutellous to shortly pilose; heads globular, 4–15-flowered, white to golden. Flowers 5-merous; sepals c. ⅔-united. Pods stipitate, flat, normally curved, 2–8 cm long, 5–11 mm wide, crustaceous, densely hairy; margins thick. Seeds transverse to oblique, oblong to elliptic, 2.5–4.5 mm long, arillate.
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