PRA prepared by I Dancza, G Schrader, U Starfinger and presented to the EPPO Panel on invasive species in 2006. 

S. inaequidens originates from South Africa, and was introduced into Europe with imports of wool. Its presence was first recorded in 1889 in Germany, 1922 in Belgium, 1928 in Scotland, 1935 in France and 1947 in Italy. From these foci, S. inaequidens started to spread to other European countries in the 1970s and is considered an invasive plant in many of these countries and 2 have detrimental effects on the use of land and on the environement