Đâu cỏ dại
Bắc Mỹ | US Department of Agriculture |
Châu Âu | CABI - Invasive Species Compendium |
Địa Trung Hải | Plants of the World Online |
Nam Phi | Plants of the World Online |
Trung Đông | Plants of the World Online |
Châu Úc | R.P. Randall (2007) - The Introduced Flora of Australia and its Weed Status |