Slender shrub 3–4 m high; juvenile bipinnate leaves persistent for a long period. Branchlets glabrous. Phyllodes oblanceolate or narrowly oblong-elliptic, straight to shallowly curved, 9–15 cm long, 7–21 mm wide, much narrowed at base, obtuse-mucronulate, occasionally acute, thin, glabrous; midrib prominent and contiguous with abaxial margin near base; lateral veins obscure; gland not prominent, 1–5 mm above pulvinus. Inflorescences 6–14-headed racemes; raceme axes 2–8 cm long, glabrous; peduncles 7–10 mm long, glabrous; heads globular, 20–35-flowered, cream. Flowers 5-merous; sepals ½–¾-united, normally densely tomentulose towards apices. Pods narrowly oblong, rounded over seeds along midline, to 10 cm long, 13–20 mm wide, firmly chartaceous to thinly coriaceous, blackish, glabrous. Seeds longitudinal, oblong-elliptic, c. 6 mm long, dull, dark brown; funicle ¾ encircling seed, light brown; aril clavate.