Shrub 0.3-0.6 (-1) m high, multistemmed from a woody rootstock; stems slender. Branchlets puberulous to hirsutellous, with hairs commonly tubercule-based, sometimes glabrous. Stipules narrowly triangular, 1.5-4 mm long. Phyllodes elliptic to broadly elliptic or obovate, 1.5-5 cm long, 1-2.5 cm wide, undulate, obtuse-mucronate to acute, sometimes ±pungent, green, with indumentum as on branchlets; midrib and marginal nerves prominent; lateral nerves obvious, openly anastomosing; gland 3-11 mm above base, slightly raised. Inflorescences normally 1-headed rudimentary racemes with axes > 1 mm long; peduncles 1-2 cm long, ±glabrous; heads globular, loosely 5-9-flowered, pale yellow to white, often drying orange; buds acute to apiculate. Flowers 4-merous; sepals 3/4-united. Pods linear, spirally twisted at least when young, to 11 cm long, 5-6 mm wide, coriaceous-crustaceous to subwoody, glabrous; margins thick. Seeds presumably longitudinal, oblong-elliptic, 4 mm long, glossy, dark brown; aril terminal.
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