Acacia sibirica S.Moore

Bushy shrub or tree to 5 m high. Bark fissured at base, grey. Branchlets terete except at resinous apices, glabrous. Phyllodes linear to very narrowly elliptic, flat or sometimes subterete, straight or slightly curved, (2–) 3–10 (–12.5) cm long, 1–4 (–9) mm wide, thick, coriaceous, rigid, glabrous, finely multistriate, with 9–15 longitudinal non-anastomosing veins per mm; midvein sometimes more prominent; gland ±basal. Peduncles 3-15 mm long. Flower-heads paired in upper axils, obloid or spicate, 0.3–1 (–3.5) cm long, light golden. Flowers 5-merous; calyx cupular, 0.6–1 mm long, dissected to 1/5, pubescent at base and sometimes along midribs; corolla 1.5–1.8 mm long, dissected c. 1/2. Pods narrowly oblong-elliptic to linear, straight-sided or variably ±constricted between seeds, flat, convex over seeds alternately on each side, to 12.5 cm long, 4–7 (–11) mm wide, chartaceous, brown, reticulate, glabrous. Seeds longitudinal to longitudinally oblique, elliptic-oblong, 3–5 mm long, dark brown to blackish; areole small, with U-shaped pleurogram.

Common in shallow soils of stony or rocky ridges and breakaways, also on sand dunes; often in mulga communities on low hills.