Tree or large shrub to 5 m tall, branches sometimes sprawling. Branchlets dark red, angular, glabrous. Phyllodes narrow, lanceolate-falcate, widest above middle, 7–13 cm long, 4–8 mm wide, glabrous; apex with callus point, sometimes oblique; longitudinal nerves 8–14, widely spaced, (2–) 3–5 per mm, with an occasional anastomose; gland basal; pulvinus 1.5–2.5 mm long. Spikes paired in upper axils, interrupted, 3.5–4.5 cm long, yellow; peduncles 1–2 mm long, glabrous. Flowers 4-merous; calyx 0.5 mm long, shortly lobed, glabrous except for a few hairs on lobes; corolla lobed to level of calyx, c. 1.5 mm long, strongly reflexed; stamens c. 2.5 mm long; ovary glabrous. Pods glabrous, linear, straight or slightly curved, to 9 cm long, 2–3 mm wide, reticulately nerved, with thickened margins, raised over seeds. Seeds longitudinal, obloid, 2–2.5 mm long, 1.5–1.7 mm wide; aril small, cupular, yellow.
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