The large shrub or tree up to 2 to 4 metres (7 to 13 ft) tall[5] and has a similar width,[4] it has ribbed branchlets that are often arched downward.

The erect phyllodes are asymettric and have a lanceolate shape and are around 30 millimetres (1.18 in) in length and 7 mm (0.276 in) wide.

[5] The spiny stipules that grow at the base of the phyllodes deter livestock from feeding on or too close to the plant.

The species was first formally described by the botanist Augustin Pyramus de Candolle in 1813 as part of the work Catalogus Plantarum Horti Botanici Monspeliensis.

[3] Kangaroo thorn is widely spread across Australia, regenerating from seed after disturbances, such as bush fire.