Glabrous shrub to 2–3 m high, sometimes procumbent. Penultimate branchlets with prominent lenticels and/or bark breaking into ±rectangular flakes. Stipules ± deltate, c. 0.5 mm long. Phyllodes sessile, normally patent to inclined, normally slightly asymmetric, lanceolate to linear-lanceolate or narrowly elliptic, usually 1–3.5 cm long, 1.5–4 mm wide, with unequal and oblique base, pungent, rigid; midrib prominent; gland obscure, 3–6 mm above pulvinus, sometimes absent. Inflorescences simple, normally 1 per axil; peduncles 0–13 mm long; basal bract frequently cleft; heads globular, 30–40-flowered, pale yellow. Flowers 5-merous; sepals free. Pods stipitate, oblong to narrowly oblong, to 5.5 cm long, 4–7 mm wide, chartaceous. Seeds transverse to oblique, oblong to elliptic, 3–3.5 mm long, dark grey-brown to black, exarillate; funicle filiform.
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