[Wikipedia] South America Native, Invasive: Native to South America, it is widely naturalized in Australia, USA, South Asia, Southern Europe and Africa. A garden escape, it is a widespread, highly invasive and common weed in gardens that is hard to eradicate. It grows in grasslands, lawns, footpaths, pastures, roadsides and disperses through seed and underground bulblets. Its seeds can be dispersed by wind, water and dumped garden waste.[5] (link added by Mary Ann Machi)