Native to 68 botanical countries across Africa, Northern America, and Southern America; introduced into Assam, Bangladesh, Caroline Is., China South-Central, China Southeast, East Himalaya, Gulf States, Hainan, Hawaii, India, Malaya, Marianas, Marshall Is., Northern Territory, Queensland, Samoa, Society Is., Taiwan, Tokelau-Manihiki, Tuamotu, Western Australia (source: POWO). Flora of the World documents 3 occurrences across 3 countries.