Sul rinvenimento di Centaurea diluta (Compositae) esotica spontaneizzata in Calabria

On the finding of Centaurea diluta (Compositae) exotic naturalized in Calabria - The occurrence in Calabria (S-Italy) of Centaurea diluta Aiton, a dangerous alien invasive species of cereals crops and waste grounds, is here reported for the first time. New data are added about the alien status in Italy.