Orig. (Eggler 1933): Polygono-Heleocharetum ovatae (Heleocharis ovata = Eleocharis ovata, Polygonum hydropiper = Persicaria hydropiper, Polygonum lapathifolium = Persicaria lapathifolia subsp. lapathifolia, Polygonum minus = Persicaria minor, Polygonum tomentosum = Persicaria lapathifolia subsp. pallida)

Syn.: Caricetum cyperoidis Eggler 1933 (§ 25), Eleocharito ovatae-Caricetum cyperoidis Klika 1935, Cypero fusci-Limoselletum aquaticae (Oberdorfer 1959) Korneck 1960 p. p., Lindernio-Eleocharitetum ovatae Pietsch 1973, Riccio cavernosae-Limoselletum aquaticae Philippi 1968 p. p., Coleantho-Spergularietum echinospermae Vicherek 1972 prov. p. p., Peplido portulae-Eleocharitetum ovatae Pietsch 1973

Formal definition: (group Eleocharis ovata OR Coleanthus subtilis cover > 25 %) NOT Alisma gramineum cover > 5 % NOT Bidens radiata cover > 50 % NOT Bidens tripartita cover > 50 % NOT Bolboschoenus maritimus s. l. cover > 25 % NOT Eleocharis acicularis cover > 50 % NOT Juncus bulbosus cover > 25 % NOT Oenanthe aquatica cover > 25 % NOT Persicaria amphibia cover > 25 % NOT Persicaria lapathifolia cover > 50 % NOT Ranunculus sceleratus cover > 50 % NOT Rumex.maritimus cover > 50 % NOT Scirpus radicans cover > 25 % NOT Typha latifolia cover > 25 %