Glabrous tree to 18 m high, usually with short horizontal branches and pendulous branchlets and phyllodes; habit often conifer-like or sheoak-like. Wood extremely hard. Phyllodes sometimes continuous with branchlet but normally indistinctly articulate, rigid on young plants, quadrangular with a yellowish vein at apex of each angle, 8–12 cm long, sometimes to 40 cm, c. 1 mm wide, subulate (the slender, sharp points often broken off), smooth; pulvinus obscure. Inflorescences simple, seemingly 1 per axil; peduncles 12–15 mm long; heads globular, sparse. Flowers 5-merous; sepals united near base. Pods oblong to narrowly oblong, to 20 cm long, 3–5 cm wide, firmly chartaceous, transversely reticulate, pruinose. Seeds transverse, elliptic to almost circular, flat, 6–14 mm long, 4–8.5 mm wide, dull, dark brown-black, exarillate; funicle filiform, 7–10 mm long.
Details of utilisation of Acacia peuce are given in Boland et al. (2006: 172–173). Acacia peuce features strongly in Aboriginal mythology, and the hard, heavy wood is used for the production of clubs (Latz 1995: 113).