Shrub or tree to 7 m high, pruinose. Bark scaly or slightly corrugated, dark brown over reddish. Branchlets flattened, coarse, 3.5–11 mm wide, purplish, orange-brown or tan, pruinose, sharply angled below phyllodes; ridge decurrent into narrow wing joining abaxial phyllode margin. Phyllodes oblique, elliptic to narrowly elliptic or sometimes slightly obovate or oblong-elliptic, 6–11.5 cm long, 10–30 mm wide, coriaceous, rigid, glabrous, with 3 veins slightly more prominent; minor veins mostly 3 or 4 per mm, longitudinal, conspicuous, rarely anastomosing; lower margin normally continuous with branchlet; gland minute, basal. Inflorescence racemose; raceme axis 1–9 (–15) mm long. Spikes subsessile, 2.5–7.5 cm long, dense, dark yellow. Flowers 5-merous (rarely 4-merous or with reduced fifth sepal amongst predominantly 5-merous flowers); calyx 0.8–1.1 mm long, sinuate, dissected to ⅕, pubescent especially margins and base, with fimbriolate margins; corolla 2.5–3 mm long, dissected to ⅓, with papillose apices; ovary villous. Pods linear, slightly constricted between and slightly raised over seeds, 8–12 cm long, 3–4 mm wide, longitudinally wrinkled; margins paler. Seeds longitudinal, oblong-elliptic, 4–6 mm long, black; pleurogram inconspicuous.
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