Dove Un Erbaccia
America Centrale | Portal Nacional sobre Diversidad Biologica en Guatemala |
Regno Unito e Irlanda | Online Atlas of the British & Irish Flora |
Mediterraneo | Plants of the World Online |
Africa Meridionale | T. Rebelo & C.L. Ramjukadh (2012) - SANBI |
Australia | R.P. Randall (2007) - The Introduced Flora of Australia and its Weed Status |
Nuova Zelanda | C. Howell (2008) - Consolidated List of Environmental Weeds in NZ |