Bushy shrub or ±gnarled tree 3–7 m high. Branchlets glabrous or subglabrous. Stipules spinose, absent from some nodes, shallowly recurved, 2–4 mm long. Phyllodes mostly narrowly oblong-oblanceolate to linear, (2–) 3–6 (–7.5) cm long, 2–5 mm wide, narrowed at base, pungent, glabrous to subglabrous; midrib prominent; lateral nerves obscure; gland 0–5 mm above pulvinus, with an additional gland often at base of cusp. Inflorescences simple, (1 or) 2 per axil, initiated synchronously with phyllodes on new shoots; peduncles 15–20 mm long, glabrous or hirtellous; heads globular, 23–32-flowered, pale yellow. Flowers 5-merous; sepals free to ½-united. Pods narrowly oblong, to 9 cm long, 1–2 cm wide, chartaceous, finely transversely reticulate, glabrous. Seeds transverse to oblique, widely elliptic to widely ovate, 6–7.5 mm long, dull, brown, exarillate; funicle strap-like.
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