Dense intricate shrub, rarely a tree, 0.6–3 m high. Branchlets ±appressed-puberulous (at least at nodes), glabrescent, scarred where phyllodes have fallen. Phyllodes sessile, inserted on distinct yellow stem-projections, patent to inclined, straight to shallowly curved, subterete to compressed, mostly 15–35 mm long, ±1.5 mm wide, pungent, rigid, dull, glabrous or glabrescent, with ±20 rather close plane somewhat obscure veins, with stomata ±evident; gland mostly 2–7 mm above base. Inflorescences simple, commonly 2 per axil; peduncles 3–10.5 mm long, glabrous or sparsely appressed-puberulous; heads globular, rarely ellipsoid, 3.5–6 mm diam., 12–19-flowered, golden. Flowers 5-merous; sepals commonly free, sometimes to ½-united. Pods linear, slightly constricted between seeds, arcuate to once-coiled, 3–6.5 cm long, 2–5 mm wide, firm-chartaceous, longitudinally venose, sparsely appressed-puberulous to glabrous. Seeds longitudinal, lanceolate-oblong or oblong-elliptic, 4–5 mm long, glossy, black; aril large, yellow or orange.
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