Naturalized alien flora of the world

PP and JP were supported by long-term research development project RVO 67985939 (The Czech Academy of Sciences) and project no. 14-36079G, Centre of Excellence PLADIAS (Czech Science Foundation). PP acknowledges support by Praemium Academiae award from The Czech Academy of Sciences. MvK, WD and MW acknowledge funding by the Deutsche Forschungsgemeinschaft (KL 1866/9-1 and FZT 118 for iDiv), FE, BL, HS, SD and DM were funded by the Austrian Science Foundation FWF (grant I2096-B16). HS acknowledges support by the Deutsche Forschungsgemeinschaft (DFG, grant SE 1891/2-1). JT would like to express his sincere appreciation to the Deanship of Scientific Research at King Saud University for funding this research (RG-1437-002).