Shrub or tree 2–4 m high, rarely to 8 m high, bushy-crowned. Branchlets glabrous or sometimes minutely appressed-hairy at the resin-ribbed apices. Phyllodes ascending to erect, linear, straight to slightly incurved, 8–14 cm long, 1.5–3 mm wide, acuminate (with tip commonly slightly curved), not rigid, subglaucous to grey-green, minutely appressed-hairy when young otherwise glabrous, normally 3-veined per face with the more prominent central vein and marginal veins resinous, not reticulate between veins. Inflorescences simple, commonly 1 per axil; peduncles 3–5 mm long, minutely appressed-hairy to ±glabrous, resinous; spikes 11–15 mm long, 4 mm diam., sometimes interrupted. Flowers 5-merous; sepals 2/3-united; calyx c. 1/5 length of petals. Pods linear, raised over and slightly constricted between seeds, to 7 cm long, 2-3 mm wide, ±firmly chartaceous, glabrescent; margins yellowish, shiny resinous. Seeds longitudinal, oblong, 3 mm long, glossy, tan; aril terminal, whitish.
Grows in stony red soil amongst granitic rocks on lower slopes of low, rocky hills, with mulga (W.A., N.T.) and A. olgana (S.A.).
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