Tree 3–12 m high; crown grey-green to pale green. Bark thick, papery, flaky and yellow-brown stems and branches of young to medium-aged plants, becoming dark coloured and shallowly rimose on main trunks of mature plants. Branchlets slender, often pendulous, glabrous. Phyllodes dimidiate to subfalcate, sometimes falcate, 5.5–18.5 cm long, 0.9–3.5 cm wide, glabrous, dull grey-green; longitudinal veins numerous (4–6 (–7) per mm), parallel, mostly not anastomosing, with 6–8 slightly more pronounced than the rest, the minor veins slightly raised and normally flat-topped (when dry), main veins commonly confluent with lower margin for a short distance above pulvinus; pulvinus 3–4 (–4.5) mm long. Inflorescences simple, 1–4 (–5) per axil; peduncles 2–5 mm long, glabrous; spikes 1–4 cm long, almost cream to pale yellow. Flowers 5-merous; calyx gamosepalous, shallowly dissected, glabrous; ovary densely hairy on upper half. Pods oblong to narrowly oblong, flat or 1–3 times spirally twisted, straight to slightly recurved, 2–10 (–12.5) cm long, 1.4–2.2 (–3.2) cm wide, dehiscing along ventral suture, woody, resinous, glabrous, veins ± oblique and not or scarcely raised. Seeds transverse to oblique, usually irregularly-shaped, often twisted, 4–7 mm long, 3–4 mm wide, glossy, black; funicle/aril with 1–3 folds, 4–6 mm long (unextended), creamy, ageing pale yellow.
Grows in a wide range of habitats including margins of watercourses, coastal sand dune systems (including shell banks), sandstone plateaus and on sandy plains.
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