De Castro O, Geraci A, Mannino AM, Mormile N, Santangelo A, Troia A (2021) A Contribution to the Characterization of Ruppia drepanensis (Ruppiaceae), A Key Species of Threatened Mediterranean Wetlands. Annals of the Missouri Botanical Garden 106(1): 1-9; the records for Puglia and Sardegna by Pignatti et al. (2017) should be verified.

Puglia: segnalazione dubbia / doubtful record; Sardegna: segnalazione dubbia / doubtful record; Sicilia;