Floating, in part infra-aquatic, formations of Sphagnum spp., Scorpidium scorpioides, Utricularia minor, Utricularia intermedia, Utricularia ochroleuca, Utricularia bremii, Sparganium minimum, of dystrophic, oligotrophic or sometimes mesotrophic, bog pools, fen pools, heath pools, woodland ponds of the Palaearctic region.