This vegetation type is dominated by Utricularia australis, a submerged, free-floating bladderwort. It occurs in mesotrophic to naturally eutrophic water bodies such as small fishponds, alluvial pools and oxbows, but it can be also found in flooded sand pits and newly established fishponds. It is scattered across the Czech Republic, with most localities in forested colline areas, which still contain many habitats with clear water.