Shrub usually dense and 0.5-2.3 m high. Branchlets ribbed, glabrous to shortly pilose. Stipules usually persistent. Phyllodes often ±patent, cuneate to obtriangular with a prominent gland-bearing angle on adaxial margin above the middle, ±obliquely truncate, usually 9-25 mm long and 5-13 mm wide with l:w = 1.5-2.5, scarcely pungent, glabrous; midrib ±central. Inflorescences extremely reduced 1 (2)-headed racemes; raceme axes 0.5-1 mm long; peduncles 10-18 mm long, to 25 mm long in fruit, rather slender, glabrous; heads globular, 7-16-flowered, pale yellow. Flowers 4-merous; sepals united to near apex, with lobes broadly triangular. Pods linear, curved, to 6.5 cm long, 2-4 mm wide, crustaceous, blackish, normally ±glabrous; margins thick, yellowish. Seeds longitudinal, oblong to elliptic, 3-3.5 mm long, shiny, brown; aril ±clavate.
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