Trees, to 15 m high, bark brown, smooth; branchlets terete, glabrous. Phyllodes alternate; stipules lateral; petiole 8-20 mm long, pulvinate, slender, glabrous; lamina 7-20 x 1-5 cm, linear, falcate or falcate-elliptic-falcate, base attenuate, apex subacute or obtuse, margin entire, glabrous, coriaceous; 3-6 parallel ribs from the base, palmate, prominent, intercostae reticulate. Flowers bisexual, yellow, 2.5 mm, in axillary spikes, to 4-8 cm long; calyx 0.5-1 x 0.8-1 mm, campanulate; lobes 5; corolla ca. 2 mm long; lobes 5, 1.5-1.8 mm, lobes lanceolate; stamens many, 3-4 mm long; ovary superior, subsessile, glabrous; styles 3-4 mm long. Fruit a pod, 3-10 x 0.5-1 cm, flat, glabrous, woody and much twisted in irregular coils; seeds black, 0.6 x 0.5 cm, with orange-yellow coloured aril.