This association includes species-poor aquatic vegetation dominated by Nuphar pumila, occurring in oligo-mesotrophic to mesotrophic water bodies, especially fishponds with low-intensity management and oxbows in the floodplains of upper river courses. Nuphar pumila appears only in the advanced stages of terrestrialization, when the bottom is covered with organic sediment. This rare vegetation type occurs only in the upper Vltava floodplain in the Šumava Mountains and the Bohemian-Moravian Uplands. Historical records are also from the Třeboň Basin.