It is so because plant can be native in two continents.
For Example:
1. Abutilon grandifolium, is native to South Africa and occurs, mainly in the KwaZulu-Natal and Eastern Cape Provinces but It is also reported to be native to South America.
2. The ancient tree (Carob tree) is native around Mediterranean Continents (Europe, Africa and Asia).
During the First Crusade, Christian knights from Europe capture Jerusalem after seven weeks of siege and begin massacring the city’s Muslim and Jewish population.