×Sedeveria mauroi (Crassulaceae), a new alien species established in NE Italy

A new nothospecies belonging to the Crassulaceae was discovered by one of the authors (MM) near the Garda Lake (Trentino, Italy). Study of the plant in the field and in cultivation for some years has enabled us to ascertain that this plant belongs to the nothogenus ×Sedeveria. The nothospecies, not yet described, is the result of putative hybridization between Echeveria agavoides Lem. and Sedum cfr. pachyphyllum Rose, and the new name ×Sedeveria mauroi is now proposed. Like its parents, this hybrid is able to propagate itself easily, through new plantlets growing from leaves detached from the stem, while no seed production has been observed. ×Sedeveria mauroi is treated as naturalized.