Shrub or small tree to 4 m tall, openly branching. Branchlets pendulous, flexuose, ribbed, sericeous between ribs. Phyllodes sessile, strongly incurved, quadrangular in section, 7-25 cm long, ±1 mm wide, attenuate apically, yellow-green, glabrous, with 4 nerves (one at each angle separated on each side by a fine darker furrow); gland basal, swollen. Inflorescences simple, 1-3 per axil; heads subsessile, obloid to shortly cylindrical, 6-10 mm long, 5-10 mm diameter, subdense, golden. Flowers 4-merous; sepals united. Pods linear, ±constricted between seeds, ?straight, to 13 cm long, 2-2.5 mm wide, firmly chartaceous, antrorsely strigulose; margins broad, yellow. Seeds longitudinal, oblong-elliptic, 3-4 mm long, shiny, mottled brown and cream with a dark brown peripheral line; aril terminal, creamy yellow.
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