Orig. (Jurko 1963): Chelidonio-Robinietum ass. nova (Chelidonium majus, Robinia pseudoacacia)

Syn.: Impatienti parviflorae-Robinietum pseudoacaciae Sofron 1967

Formal definition: Robinia pseudoacacia cover > 25.% AND (Anthriscus cerefolium cover > 25 % OR Anthriscus sylvestris cover > 25 % OR Chelidonium majus cover > 25 % OR Urtica dioica cover > 5 % OR group Alliaria petiolata OR group Urtica dioica) NOT Acer pseudoplatanus cover > 25.% NOT Alnus glutinosa cover > 25 % NOT Arrhenatherum elatius cover > 25 % NOT Betula pendula cover > 5 % NOT Calamagrostis epigejos cover > 5 % NOT Fraxinus excelsior cover > 25 % NOT Melica transsilvanica cover > 5 % NOT Pinus nigra cover > 25 % NOT Pinus sylvestris cover > 25 % NOT Poa nemoralis cover > 25 % NOT Poa pratensis agg..cover > 25 % NOT Populus tremula cover > 5 % NOT Quercus petraea agg. cover > 25 %