This association includes species-poor marshes dominated by the tall sedge Carex rostrata. Fen species Menyanthes trifoliata and Potentilla palustris often co-dominate. Moss layer is absent or sparse. This vegetation type is common on acidic substrates in fishpond littoral zones. The water regime is relatively stable with slight overflooding for most of the year. The association occurs in moderately cool colline and submontane areas of the Czech Republic, especially in the Bohemian Massif.