Where A Weed
North America | Weed Science Society of America (2010) - Composite List of Weeds |
Caribbean | Plants of the World Online |
South America | Plants of the World Online |
Europe | NOBANIS - European Network on Invasive Alien Species |
East Asia | T. Mito & T. Uesugi (2004) - Invasive Alien Species in Japan |
Indian Ocean | Plants of the World Online |