Orig. (Passarge 1979): Senecioni-Coryletum avellanae ass. nov. (Senecio fuchsii = S. ovatus)
Syn.: Rubo-Coryletum avellanae Oberdorfer 1957 (§ 37, nomen dubium), Carici brizoidis-Coryletum Weber 1999
Formal definition: Corylus avellana cover > 25.% AND group Oxalis acetosella NOT Abies alba cover > 25 % NOT Acer pseudoplatanus cover > 25 % NOT Alnus glutinosa cover > 25 % NOT Carpinus betulus cover > 25 % NOT Fagus sylvatica cover > 25 % NOT Fraxinus excelsior cover > 25.% NOT Picea abies cover > 25 % NOT Pinus sylvestris cover > 25 % NOT Quercus petraea agg. cover > 25 % NOT Quercus robur cover > 25 % NOT Tilia cordata cover > 25 % NOT Tilia platyphyllos cover > 25.% NOT Ulmus glabra cover > 25 %