The nomenclature of some fossil and extant homonyms of Typha (Typhaceae) is resolved. Fossil Typha elongata P.I. Dorofeev 1982, being an illegitimate later homonym of extant Typha elongata Pauquy 1834, is renamed T. asiatica nom. nov. Typha sibirica Krasnova 1987 (extant) is replaced by a new name, T. krasnovae nom. nov., on account of the earlier homonym, T. sibirica P.I. Dorofeev 1982 (fossil). T. transdnestrovica nom. nov. is proposed to replace the later homonym T. elliptica Negru 1976 (fossil) non T. elliptica Gmelin 1808 (extant). Fossil seeds from the Lower Oligocene (Rupelian) of Bembridge (Isle of Wight, U.K.), previously attributed to the fossil-species T. latissima, based on leaves, are described as a new fossil-species, T. latissimisperma sp. nov. Typha latissima is neotypified; Typha angustior is lectotypified for the first time.