Shrub to 2.5 m high, erect to low spreading, glabrous, resinous, mostly branching from or near base. Bark ±smooth or finely fissured, usually grey. Branchlets angular towards apices otherwise ±terete, with resin-crenulated ridges. Phyllodes narrowly lanceolate to broadly ovate, narrowly elliptic to broadly elliptic, ±oblong or orbicular, straight or curved, sigmoid or nonsigmoid, 0.4-3 cm long, 1.5-10 mm wide, flat to undulate, coriaceous, with (2-) 3 or 4 longitudinal nerves per mm; main nerves 3-7, more prominent; minor nerves obscure; gland inconspicuous, to 1 mm above pulvinus; pulvinus 0.2-0.7 mm long. Inflorescences single or sometimes paired; heads obloid or spicate (0.5-3.5 cm long), rarely globular (c. 0.3 cm diam.), yellow to bright yellow or golden to orange-yellow. Flowers 5-merous; calyx cupular, 0.6-1 mm long, dissected for 1/8-1/4; corolla 1-1.7 mm long, dissected for 1/3-3/5, the petals with prominent midrib. Pods ±narrowly oblanceolate, sometimes very narrowly elliptic to linear, basally tapered, straight-sided, flat, 2-9 cm long, 3.5-10 mm wide, thinly woody to ±woody, obliquely nerved, opening elastically from apex; outer surface of valves often with paler areas over seeds; seed-partitions present. Seeds oblique, narrowly oblong-elliptic or oblong-elliptic, 2.5-5 mm long, brown to dark brown; areole open, with pale halo; funicle-aril narrowly turbinate.
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