Diffuse shrub, prostrate or erect, to 1 m high. Branchlets normally hirsutellous, infrequently glabrous. Stipules persistent. Phyllodes ± sessile, patent to inclined, inequilateral, shape variable, usually with a pronounced rounded or triangular gland-angle on adaxial margin near or below middle, 4–15 mm long, 1.5–4 mm wide, l: w usually 1.5–5, acuminate, pungent, rigid, glabrous or hirsutellous, green; midrib prominent, central or near lower margin. Inflorescences simple, normally 1 per axil; peduncles normally 4–10 mm long, glabrous or hairy; basal bracts 3; heads globular, 20–30-flowered, cream to pale yellow; bracteoles acuminate. Flowers 5-merous; sepals c. ⅔-united; petals often prominently 1-veined. Pods to 4 cm long, 4–5 mm wide, firmly chartaceous to thinly coriaceous, dark brown to blackish, glabrous, sometimes hairy. Seeds longitudinal to oblique, broadly elliptic to spherical, c. 3 mm long, variably mottled, exarillate; funicle filiform.
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