Unarmed tree up to 20 m high; young branchlets angular, glabrous or the young shoots minutely pubescent. Leaves phyllodic, apparently simple, glabrous, mostly 6—12 x 0,6-1,2(2,5) cm, linear-lanceolate to ob-lanceolate or narrowly obovate, straight to falcate, narrowed basally, with 3-7 promiÂnent longitudinal nerves and a conspicuous reticulate venation between the longitudinal nerves (on young plants bipinnate leaves are sometimes produced at the apex of the phyl-lode). Inflorescences globose, solitary or in short axillary racemes. Flowers pale yellowish-white; peduncles up to 6 mm long. Calyx more than half as long as the corolla. Corolla glabrous. Pods brown, 5-15 x 0,6-0,8 cm, oblong, falcate or variously coiled or spirally twisted, flattened, margins thickened, not constricted between the seeds, dehiscing longitudinally along both margins. Seeds dark brownish-black, 4-5 x ±2,5 mm, smooth, compressed; areole ±3x1 mm; funicle very long, thickened, almost encircling the seed in a double fold. Introduced from Australia.
