Spindly shrub (1–) 2–2.5 (–3.5) m high. Branchlets light brown to red, lenticellular, glabrous, resinous-viscid, scarred where phyllodes have fallen. Stipules persistent, 0.5–1 mm long, erect, often enveloped in resin. Phyllodes patent to ±inclined, acicular, quadrangular-terete to flat, (8–) 10–20 (–30) mm long, 0.5–1.2 mm wide, l: w = 30, pungent with a slender cusp, rigid, normally subglaucous to ±glaucous; 4-veined when quadrangular-terete, 1-veined per face when flat. Inflorescences simple, 1 or 2 per axil; peduncles 10–15 (–20) mm long, exceeding phyllodes, slender; heads globular, 5–6 mm diam. (fresh), 40–60 flowers, golden. Flowers 5-merous; sepals free, linear-spathulate. Pods submoniliform, (20–) 30–50 mm long, 3 mm wide, firmly chartaceous to thinly coriaceous. Seeds longitudinal, oblong to oblong-elliptic, 3–3.5 mm long, dark brown to ±black, mottled cream and cream on periphery and bordering pleurogram, exarillate.
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