These marshes are dominated by Carex lasiocarpa, which reaches a height of up to 150 cm and forms species-poor stands along the shores of fishponds and in depressions on peaty soils. Water table is slightly above the soil surface for most of the year. Nutrient content is extremely low, whereas mineral content can vary. Currently this vegetation type is rare and endangered, occurring at a few sites in moderately warm to moderately cool areas of the Czech Republic.