Tree 4–9 m high. Bark corky, fissured. Branchlets glabrous; younger branchlets often puberulous. Stipular spines 0.5–1.5 mm long, often inconspicuous or absent, to 10 mm long on young growth. Leaves: petiole 0.8–2.2 cm long, ±glabrous to puberulous or pubescent, mostly with a prominent gland at base of or just below lowest pair of pinnae; rachis (3.7–) 6.5–17.5 (–22) cm long, ±glabrous to puberulous or pubescent, mostly with a prominent, often broadly obovate gland at apex and sometimes at base of second pair of pinnae from apex; pinnae 6–18 pairs (often subopposite), 4–8 (–11.5) cm long; pinnules 13–34 pairs, oblong to narrowly oblong, lanceolate or elliptic to narrowly elliptic, sometimes slightly curved, (2.5–) 5–12 mm long, 1.5–3.5 (–4) mm wide, discolorous, glabrous or ciliolate-ciliate, with midvein and lateral veins visible and raised above. Inflorescences 1 or 2 in axils, simple or on a short axis which sometimes extends as new growth; peduncles (7–) 25–43 mm long, with involucel of bracts ⅓–½ way from base; heads globular, 16–23-flowered, cream-coloured to pale yellow. Pods slightly constricted between some or all seeds, ±flat except slightly raised over seeds, 8–13 (–17.5) cm long, 15–22 mm wide, coriaceous to thinly woody, longitudinally and obliquely veined forming a repeated ‘V’ pattern, almost glabrous or puberulous mainly along margins.
Grows in open forest, open woodland, low open woodland with grassy understorey and grassland, in chocolate brown soil, gravelly clay soil, rocky limestone soil, sandy red soil and alluvium, near watercourses, on drainage flats, sandstone outcrops and in undulating topography.
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