This association represents one of the most common types of fen grasslands on non-calcareous bedrock in central Europe. Both productivity and species richness are rather high in the context of fen habitats, but the representation of both the high pH-specialists and boreal species is very low. The vegetation is usually dominated by common species of short sedges such as Carex demissa. C. echinata. C. nigra and C. panicea, the peat mosses Sphagnum subsecundum and S. teres and common non-sphagnaceous mosses. The peat layer is usually shallow and calcium concentrations are low. The association is widespread in submontane to montane areas of the Czech Republic.