A Contribution to the Characterization of Ruppia drepanensis (Ruppiaceae), a Key Species of Threatened Mediterranean Wetlands

To elucidate the taxonomic status of Ruppia drepanensis Tineo ex Guss. (Alismatales, Ruppiaceae), we performed morphological analysis and DNA barcoding historical materials (including lectotype) fresh samples those from a recently discovered population near locus classicus in Sicily, Italy). We conclude that R. is separate species, closely related to spiralis L. Dumort., occurs temporary inland waters western central sectors Mediterranean region. also highlight importance vouchers need link molecular investigations field, ecological, investigations.