Hvor Ukrudtsplante
Nordamerika | Weed Science Society of America (2010) - Composite List of Weeds |
Europa | NOBANIS - European Network on Invasive Alien Species |
Forenede Kongerige og Irland | NOBANIS - European Network on Invasive Alien Species |
Middelhavet | Plants of the World Online |
New Zealand | NZ Plant Conservation Network |