Alnus cordata, the Italian alder, is a tree or shrub species belonging to the family Betulaceae, and native to the southern Apennine Mountains (Campania, Basilicata and Calabria, mainly on western mountain sides) and the north-eastern mountains of Corsica. It has been introduced in Sicily and Sardinia, and more recently in Central-Northern Italy, other European countries (France, Belgium, Spain, Azores, United Kingdom) and extra-European countries (Chile, New Zealand), where it has become naturalised.