Orig. (den Hartog 1963): Lemnetum trisulcae ass. nov.
Syn.: Lemnetum trisulcae Kehlhofer 1915 (§ 2b, nomen nudum), Lemna trisulca-Gesellschaft Knapp et Stoffers 1962 (§ 3c)
Formal definition: Lemna trisulca cover > 50 % NOT Batrachium aquatile s. l. cover > 25 % NOT Batrachium rionii cover > 25 % NOT Berula erecta cover > 25 % NOT Bidens cernua cover > 25 % NOT Ceratophyllum demersum cover > 25 % NOT Glyceria maxima cover > 25 % NOT Hottonia palustris cover > 25 % NOT Nuphar lutea cover > 25 % NOT Phragmites australis cover > 25 % NOT Potamogeton trichoides cover > 25 % NOT Riccia fluitans cover > 25 % NOT Riccia rhenana cover > 25 % NOT Ricciocarpos natans cover > 25 % NOT Sagittaria sagittifolia cover > 25 % NOT Salvinia natans cover > 25 % NOT Schoenoplectus lacustris cover > 25 % NOT Sparganium emersum cover > 25 % NOT Sparganium erectum cover > 25 % NOT Typha angustifolia cover > 25 % NOT Typha latifolia cover > 25 % NOT Utricularia australis cover > 25 % NOT Wolffia arrhiza cover > 25 %