Shapely, obconic tree 3–6 (–7) m high, crowns flat-topped to subrounded. New shoots resinous. Branchlets glabrous. Phyllodes wide-spreading, linear to narrowly elliptic, falcately recurved, 5–11 cm long, 3–7.5 mm wide (rarely a few phyllodes to 2 mm wide), acute to acuminate with normally ±curved tip, shiny, glabrous, dark green; longitudinal veins fine, numerous and close together, the central vein the most evident; marginal veins red-brown and resinous, or sometimes yellow. Inflorescences mostly simple, 1–4 per axil; peduncles 2–8 (–12) mm long, appressed-hairy to glabrous; heads subglobular or obloid to cylindrical, 3–10 mm long, golden. Flowers 5-merous; sepals ±free to ¼ or ⅓ united. Pods narrowly oblong to linear or submoniliform, occasionally moniliform, ±straight to prominently curved, 5–16 cm long, 6–9 mm wide, firmly coriaceous-crustaceous to subwoody, dark brown to blackish, not resinous or with a thin, patchy resin layer; marginal vein discrete and slightly to moderately thickened, yellow or light brown. Seeds longitudinal, oblong to elliptic, 5–10.5 mm long, 5–6.5 mm wide, somewhat flattened, dark brown to black; aril small, cream to orange-cream when dry.
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