<br> In the course of a comprehensive revision of the syntaxonomy and nomenclature of the class<br> Phragmito-Magnocaricetea<br> Klika in Klika et Novák 1941, it appeared necessary to resolve some nomenclatural issues in accordance with the International Code of Phytosociological Nomenclature. In this article, we present five proposals and three requests for binding decisions. We also introduce the name<br> Oenanthetalia aquaticae<br> Hejný ex Landucci et al. ord. nov., the lectotypes of the names<br> Phragmitetum australis<br> Savich 1926 nom. corr.,<br> Typho-Scirpetum mucronati<br> Tallon 1950, and<br> Apion nodiflori<br> Segal in Westhoff et Den Held 1969, and the neotypes of the names<br> Oenantho aquaticae-Rorippetum amphibiae<br> Lohmeyer 1950 and<br> Scrophulario aquaticae-Apietum nodiflori<br> Maas ex Segal in Westhoff et Den Held 1969.<br> <br> <br> (40)<br> Phragmitetum australis<br> Savich 1926 nom. corr. et cons. propos.<br> <br> Typus: Savich 1926a: 57 (holotypus)<br> <br> (=)<br> Scirpo-Phragmitetum australis<br> W. Koch 1926<br> <br> Typus: Koch 1926: 47 (holotypus).<br> <br> (41)<br> Phragmition australis<br> W. Koch 1926 nom. corr. et cons. propos.<br> <br> <br> Typus:<br> Phragmitetum australis<br> Savich 1926 nom. corr. (typus cons. propos.)<br> <br> <br> (42)<br> Glycerio-Sparganietum neglecti<br> W. Koch 1926 nom. dub. propos.<br> <br> Typus: Koch 1926: 52, tab. V, relevé 1 (lectotypus designated by Koska in Dengler et al. 2004: 371)<br> <br> (43)<br> Glycerio-Sparganion<br> Braun-Blanquet et Sissingh in Boer 1942 nom. dub. propos.<br> <br> <br> Typus:<br> Glycerio-Sparganietum neglecti<br> W. Koch 1926 nom. dub. propos (Boer 1942: 240; holotypus)<br> <br> <br> (44)<br> Nasturtio-Glycerietalia<br> Pignatti 1953 nom. dub. propos.<br> <br> <br> Typus:<br> Glycerio-Sparganion<br> Braun-Blanquet et Sissingh in Boer 1942 nom. dub. propos. (Boer 1942: 240; holotypus)<br> <br> <br> Taxonomic reference<br> : POWO (2025).<br> <br> <br> Abbreviations<br> : CCCN = Committee for Change and Conservation of Names; ICPN = International Code of Phytosociological Nomenclature (Theurillat et al. 2021).<br>