Castor Oil Plant (Ricinus communis)
Castor oil flower
Castor oil plant is declared a Class B (spread to be controlled) and Class C (not to be introduced to the Northern Territory) weed in accordance with the NT Weeds Management Act 2001.
Castor oil plant is native to Asia and Africa. It is now found in all Australian mainland states, generally along creek lines and in disturbed areas. Dense colonies may develop, particularly following heavy rains or flooding. In the NT castor oil plant has mainly been confined to the arid centre and the Victoria River District.
Castor oil plant can invade pastures, but is rarely grazed by stock. The seeds contain the extremely poisonous substance ricin, which is toxic to horses, cattle, sheep, pigs and poultry. The seeds are also toxic to humans, the consumption of two to eight seeds can lead to death.
Single castor oil plant
