Open often straggly shrub usually 0.6–3 m high, glabrous. Branchlet apices ribbed; ribs normally yellow. Stipules sometimes caducous, c. 1 mm long. Phyllodes subdistant, sessile, usually patent to inclined, rather coarse, straight to shallowly recurved, quadrangular to (especially in Tas.) flat, usually 1–4 cm long and 1–3 mm wide, pungent with slender cusp, rigid, green, 4-veined in all, prominently 1-veined per face when flat, occasionally imperfectly 2-or 3-veined; gland 2–4 mm above base. Inflorescences simple, usually 2–4 per axil; peduncles 1–2 (–3) cm long, rather slender; basal bract caducous; heads globular, 12–25-flowered, cream to rich lemon yellow. Flowers 4-merous; sepals c. ⅔-united. Pods linear, raised over seeds, arcuate to ± straight, 4–11 cm long, 4–7 mm wide, thinly coriaceous. Seeds longitudinal, 3.5–5.5 mm long; aril terminal.
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