Erect often straggly shrub mostly 1–2 m high. Branchlets sparsely to moderately hirsutellous to puberulous, at least at extremities. Stipules persistent, frequently > 1 mm long. Phyllodes often crowded, subsessile, scattered, sometimes some subverticillate, patent, linear-triangular, flat except ± quadrangular when very narrow, 5–15 mm long but often > 10 mm, 0.5–1.5 mm wide, pungent, rigid, green, usually glabrous; midrib prominent on each face; gland obscure, 0.5–3 mm above base. Inflorescences simple, 1 per axil; peduncles 7–15 mm long, slender, 0.3–0.5 mm diam. when dry, mostly glabrous; basal bracts 3 and fused; heads globular, 20–35-flowered, creamy yellow; bracteoles acuminate, not or scarcely exserted beyond flowers in buds. Flowers 5-merous; sepals free to 1/2-united; petals 1-veined. Pods normally slightly constricted between seeds, 2–6 cm long, 4–6 mm wide, thinly coriaceous, dark brown to black, glabrous or subglabrous. Seeds longitudinal, oblong to elliptic, 3.5–5 mm long, normally mottled, exarillate; funicle filiform.
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A straggling, prickly shrub. It grows 2 m tall. The small branches are covered with stiff hairs. The phyllodes are narrow and flat or angular. They are 1.5 cm long by 0.2 cm thick. They have a sharp point. They are rigid and often crowded. The flowers occur singly
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