This low-growing grassland-like vegetation type is dominated by Littorella uniflora and often codominated by Eleocharis acicularis. When flooded, it is poor in species, but annual wetland herbs appear on exposed bottom after water drawdown. This vegetation occurs in the littoral zone of a few oligotrophic to mesotrophic fishponds and water bodies in the Bohemian-Moravian Uplands, Třeboň Basin and the Brdy Mountains.