Formations of waters dominated by rooted aquatic plants with floating leaves. Usually species-poor habitats with dominance of one or several species. Ttypical species are Nymphaea alba, Nuphar lutea, Nymphoides peltata, Trapa natans, Potamogeton natans, Callitriche palustris, Polygonum amphibium and Ranunculus sp. (=Batrachium).