Diffuse shrub, prostrate, to 0.5 m high, rarely taller. Branchlets slender, finely ribbed, variably hairy, rarely glabrous. Stipules c. 1 mm long. Phyllodes mostly patent to reflexed, slender, terete to subterete, ±quadrangular when dry, 5–12 (–20) mm long, 0.5–1 mm wide, pungent with a slender, c. 1 mm long cusp, rigid, obscurely 4-veined, variably muriculate on veins, usually glabrous; pulvinus asymmetric. Inflorescences simple, 1–3 per axil; peduncles 5–13 mm long, slender, glabrous; basal bract c. 1 mm long; heads globular, sometimes obloid, 15–25 (–30)-flowered, pale or lemon yellow to yellow. Flowers 4-merous; sepals dissected to near base. Pods linear, biconvex, straight to shallowly arcuate, to 6 cm long, (2–) 3–4 mm wide, firmly chartaceous, glabrous or subglabrous. Seeds longitudinal, oblong, 3.5–4 mm long; aril terminal.
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