Wispy tree 3–8 m high. Branchlets slender, flexuose, red-brown, glabrous. Phyllodes distant, pendulous, thickly filiform, usually terete to subterete or ±quadrangular, 18–35 (–69) cm long, usually 1–2 mm wide, delicately narrowed at apex, glabrous, sometimes scurfy, obscurely 4-veined; pulvinus 2–4 mm long. Inflorescences racemose; raceme axes 3.5–9.5 cm long, glabrous; peduncles 7–10 mm long, glabrous; heads globular, 50–70-flowered, yellow; bracteoles peltate, golden-fimbriolate. Flowers 5-merous; sepals united almost to their apices. Pods linear, somewhat constricted between seeds, to 14.5 cm long, 4–6 mm wide, firmly chartaceous to thinly coriaceous-crustaceous, pruinose, glabrous. Seeds ±longitudinal, elliptic, c. 4.5 mm long, dull to slightly shiny, black; funicle ¾ encircling seed in a single fold, red-brown; aril clavate.
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