Orig. (Klika 1940): Alnus glutinosa-Dryopteris thelypteris-Assoziation (Dryopteris thelypteris= Thelypteris palustris)

Syn.: Sphagno squarrosi-Alnetum Solinska-Górnicka ex Prieditis 1997, Calamagrostio canescentis-Alnetum glutinosae sensu Mikyška 1956 non Scamoni 1935 (pseudonym), Sphagno-Alnetum glutinosae sensu Franz et Willner in Willner et Grabherr 2007 non Lemée 1937 (pseudonym)

Formal definition: Alnus glutinosa cover > 25 % AND (Betula pendula cover > 5 % OR Betula pubescens cover > 5 % OR Frangula alnus cover > 5 % OR Pinus sylvestris cover > 5 %) AND (group Carex panicea OR group Carex rostrata OR group Viola palustris) NOT group Caltha palustris NOT group Carex remota