Shrub or tree; twigs ribbed, glabrous to densely hairy. Lvs reduced to phyllodes, alternate; phyllodes glabrous, narrowly obovate, elliptic and symmetric or falcate, usually obtuse, sometimes shortly mucronate, entire, (40)-60-100 × 8-20 mm, with 3-4 prominent veins; stipules triangular, 1-2 mm long, conspicuous in young plants only. Infl. of few to numerous, many-flowered, pale creamy yellow, globose heads; heads solitary or in axillary racemes usually > lvs. Fls 5-merous, sessile. Pod glabrous, twisted or spiralled, 8-10 cm long (up to 4 cm diam.), 5-8 mm wide; aril pink to crimson or red, encircling seed.