Compact much-branched shrub to 2 m high but usually much smaller. Branchlets sparsely to moderately hirsutellous. Stipules c. 1 mm long. Phyllodes scattered, some subverticillate, subsessile, patent, linear to linear-triangular, flat but often ±quadrangular when dry due to pronounced midrib on each face, 9–15 mm long, c. 1 mm wide, pungent, rigid, glabrous; gland obscure, 1.5–2.5 mm above base. Inflorescences simple, 1 per axil; peduncles 1.5–4 mm long, slender, glabrous, recurved in fruit; basal bracts 3; heads globular, small, 8–18-flowered, bright lemon yellow; bracteoles acuminate but not exserted beyond flowers in buds. Flowers 5-merous; sepals free, oblanceolate. Pods 8–20 mm long, 3–4 mm wide, acute, 1–3-seeded, firmly chartaceous, blackish, glabrous. Seeds (immature) longitudinal, oblong, c. 3.5 mm long, exarillate; funicle filiform.
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