Spreading shrub to 0.4–1 m high. Ultimate branchlets divaricate to ascending, straight, rather short, hirsutellous to puberulous, coarsely spinose. Phyllodes dimidiate, broadest near or below middle, with adaxial margin conspicuously rounded with its proximal edge ±parallel to branchlet, 6–15 mm long, 4–9 mm wide, acuminate, pungent by a prominent cusp, green, glabrous or sparsely hirsutellous; midrib near abaxial margin; secondary veins branching and running into adaxial margin. Inflorescences 1-headed rudimentary racemes with axes more than 0.5 mm long; peduncles 4–6 mm long, glabrous or hirsutellous, recurved in fruit; basal bracts and bracteoles as for A. scalena ; heads globular, 15–17-flowered. Flowers 5-merous; sepals ¾–⅘-united; petals 1-veined. Pods tightly and somewhat irregularly coiled so they cannot be straightened out, 6–12 mm long and 4–7 mm wide in contorted state, thinly coriaceous, glabrous. Seeds longitudinal, ovate, c. 3 mm long; aril lateral.
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