Syn.: Riccietum fluitantis sensu auct. non Slavnić 1956 (pseudonym)
Formal definition: Riccia fluitans cover > 25 % NOT group Ranunculus sceleratus NOT Alopecurus aequalis cover > 25 % NOT Carex acuta cover > 25 % NOT Carex vesicaria cover > 25 % NOT Glyceria fluitans cover > 25 % NOT Glyceria maxima cover > 25 % NOT Juncus effusus cover > 25 % NOT Nymphoides peltata cover > 25 % NOT Potamogeton acutifolius cover > 25 % NOT Potamogeton natans cover > 25 % NOT Ricciocarpos natans cover > 25 % NOT Salvinia natans cover > 5 % NOT Scirpus sylvaticus cover > 25 % NOT Sparganium emersum cover > 25 % NOT Sparganium erectum cover > 25 % NOT Typha latifolia cover > 25 % NOT Utricularia australis cover > 25 %