Intricate shrub to 2 m high. Branchlets hirsutellous to puberulous. Stipules normally ± setaceous, 1–2 mm long. Phyllodes rather crowded, ± subsessile, often subverticillate, patent to inclined, terete or subterete, often drying quadrangular or ±flat with a pronounced midrib on each face, 5–14 mm long, 1–1.5 mm wide, pungent, rigid, green, glabrous; gland obscure, 0.5–2 mm above base. Inflorescences simple, 1 per axil; peduncles 5–15 mm long, stout, glabrous; basal bracts 3 and fused; heads globular, large, 5–10 mm diam. (dry), densely 27–42-flowered, usually mid-golden; bracteole laminae long-acuminate, 1.5–2 mm long, dark brown, exserted beyond flowers in bud. Flowers 5-merous; sepals ⅓–⅔-united; petals 1-veined. Pods to 4 cm long, 4–5 mm wide, thinly coriaceous-crustaceous, blackish, glabrous. Seeds longitudinal, oblong-elliptic, 4 mm long, dark brown, obscurely mottled yellow, exarillate; funicle filiform.
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