Much-branched glabrous shrub, 2–4 m high. Branchlets ascending to erect, terete, obscurely veined, pale green when young, ageing greyish, often coarsely spinose. Phyllodes resembling branchlets, erect, terete, mostly 5–14 cm long, 1.5–2 mm diam., acute, coarsely pungent, thick, colour as on branchlets, very obscurely 4-veined. Inflorescences simple and arising within the axil of phyllodes on new shoots or in racemes with axes 1–3 cm long; peduncles commonly twinned, 5–25 mm long; heads globular, 24–27-flowered. Flowers 5-merous; sepals united into a ± truncate calyx. Pods linear, to 10.5 cm long, 5 mm wide, thinly coriaceous, dark brown. Seeds (slightly immature) longitudinal, broadly elliptic to broadly ovate, c. 4 mm long; aril pale yellow.
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