Shrub or tree 2–5 (–8) m high; branches sometimes arching downwards. Branchlets ribbed, with variable indumentum, sometimes glabrous. Stipules spinose, spreading, 4–15 mm long. Phyllodes erect, oblique or dimidiate, lanceolate, sometimes narrowly oblong-elliptic, 8–20 mm long, normally 2–7 (–11) mm wide, acute or obtuse, sometimes rostellate, glabrous to sparsely hairy; midrib normally excentric; abaxial margin normally undulate. Inflorescences simple, normally 1 per axil; peduncles 5–15 (–20) mm long, normally glabrous; heads globular, to 12 mm diam. (fresh), densely (20–) 30–50-flowered, golden; bracteoles frequently acuminate. Flowers 5-merous; sepals united. Pods linear to narrowly oblong, to 6 cm long, 3–5 mm wide, thinly coriaceous, normally densely hairy. Seeds longitudinal, oblong, 3.5–5 mm long, shiny, dark brown, arillate.