Tree to 4.5 m tall, slender, occasionally weeping. Branchlets slender, with white appressed hairs between brown resinous ribs. Phyllodes linear, terete, 6–12 cm long, 0.7–1 mm diam., striate with longitudinal resinous ribs, appressed-pubescent between them. Inflorescences single in axils; peduncles 4–8 (–10) mm long; spikes c. 20 mm long, rather loose. Flowers 5-merous; calyx c. 0.7 mm long, with oblong lobes and a distinct tube 0.1–0.2 mm long, with a few hairs on lobes; corolla c. 1.2 mm long, with a few hairs on tips; stamens c. 2.5 mm long; ovary with dense appressed longish hairs. Pods linear, not stipitate, straight, square in transverse section, to 3.5 cm long, 2–4 mm wide, with narrow longitudinal wings c. 0.5 mm wide on angles, pale brown; upper and lower surfaces with coarse irregular longitudinal ribs and yellowish nerves between them; appressed-pubescent, dehiscent. Seeds longitudinal, narrowly obloid, to 8 mm long and 1.7 mm wide; aril not developed (absent?).
Recorded from red clay and red clay-loam, sometimes in rocky situations. 'Mulga', Acacia ramulosa, Eremophila spp. and Senna spp. are reported to be associated woody species.
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