Humid meadows of Atlantic and sub-Atlantic Europe dominated by, or rich in, Juncus acutiflorus. They are floristically and phytosociologically very varied and many are as related to the oligotrophic Molinion communities of unit E3.5 as to the more eutrophic Calthion ones of unit E3.41. Sharp-flowered rush meadows are particularly characteristic of the oceanic and suboceanic regions of the western seaboard of Europe from northwestern Iberia to the Low Countries, extending locally in Hercynian ranges to the Harz and the Bohemian Quadrangle and in small sub-Atlantic enclaves of the Germano-Baltic plains to eastern Germany and Poland.