Nordamerika | Plants of the World Online |
Südamerika | Inter-American Biodiversity Information Network |
UK & Irland | Online Atlas of the British & Irish Flora |
Ostasien | Plants of the World Online |
Russland | Plants of the World Online |
Zentralasien | Plants of the World Online |
Australien | R.P. Randall & O. Kessal (2004) |
Neuseeland | C. Howell (2008) - Consolidated List of Environmental Weeds in NZ |
