 In the Po Basin can be found mixed forests that include mixed deciduous oak/hornbeam forests ("Quercus robur", "Quercus cerris", "Carpinus betulus", "Ulmus minor", "Fraxinus ornus") and Riparian forest, as well as flood-plain vegetation of the Po Basin ("Fraxinus oxycarpa", "Salix alba", "Alnus glutinosa", "Ulmus minor", "Populus alba", "Populus nigra", "Quercus robur").There are also plant associations almost treeless