Slender resinous shrub or tree to 7.5 m tall. Bark mottled grey; old bark brownish to dark grey, corrugated. Branchlets ±angular towards apices, yellowish, brown or grey-brown, squamulose, densely crisped-pubescent to tomentose, ribbed. Phyllodes obliquely ovate-rhomboidal, flat, (4–) 5.5–10 (–15.5) cm long, (16–) 20–80 (–95) mm wide (to 150 mm wide on young plants), rounded at base on upper side, tapering into pulvinus, with obtuse and mucronate apex, sparsely to moderately tomentulose-waxy especially between veins, slightly vernicose, with 4 or 5 prominent veins (sometimes with a few 3-veined phyllodes) concurrent with lower margin near base (only the nerve closest to abaxial margin extending to mucro), with minor veins reticulate; gland 1, prominent, basal. Spikes 2.5–7 cm long, golden. Flowers 5-merous; calyx 0.8–1.4 mm long, dissected to ± ½ of length, with lobes slightly pubescent and with fimbriate margins; corolla 1.5–2.1 mm long, dissected to ½ of length, glabrous; ovary densely tomentose. Pods ± straight, ± terete, 5.5–15.5 cm long, tapered towards base, crustaceous, densely puberulous, dehiscing from apex and curved back. Seeds longitudinal, oblong to narrowly oblong, 6–7.5 mm long, brownish black to black.
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