Shrub to 4 m high, or sometimes tree to 5 m. Branchlets slender, dark reddish, glabrous. Phyllodes narrowly linear, straight to shallowly incurved, (4–) 6–10 (14) cm long, 2–3 mm wide, rounded-mucronulate with ± central mucro, thin, finely wrinkled when dry, glabrous; midrib obscure; gland often absent, variably positioned but commonly near middle of phyllode, small but exserted. Inflorescences 5–15-headed racemes, sometimes in terminal panicles; raceme axes 1.5–5 cm long, slender, glabrous; heads globular, 12–28-flowered, pale to bright yellow; peduncles slender, (2–) 3–8 (–11) mm long, stouter and to 11 mm long in fruit. Flowers 5-merous; sepals united but ultimately splitting and spathulate. Pods linear to narrowly oblong, to 14 cm long, 5–7 mm wide, coriaceous to thinly crustaceous, dark brown to blackish, glabrous, dehiscing unilaterally; stipe 6–7.5 mm long. Seeds longitudinal, oblong, 5.5–6.5 mm long, somewhat shiny, black; aril clavate, as long as seed.
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