The genus Vitis L. (Vitaceae) in Campania (southern Italy), with emphasis on alien units.
In the present paper, based on field, herbarium and bibliographic research, an update concerning the genus Vitis in Campania is presented. Five taxa, including three species and two nothospecies, are recorded. Vitis labrusca (casual), Vitis riparia (casual), Vitis × instabilis (casual) and Vitis × koberi (naturalized) are reported for the first time in this region. The agricultural activities and artificial green areas are confirmed as starting points for the process of invasion of alien plants in southern Italy.