Perennial halo-nitrophilous communities of sand, gravelly sand and gravel cordons of upper beaches of the arctic and boreal sea coasts of Eurasia formed by Leymus arenarius (Elymus arenarius), Ammophila arenaria, Honkenya peploides, Elymus farctus, Elymus repens, Mertensia maritima, accompanied by Atriplex spp. (Atriplex prostrata, Atriplex longipes ssp. praecox, Atriplex glabriuscula), Polygonum aviculare, Cakile maritima, Cakile arctica, Petasites spurius, Potentilla anserina. Representatives of these communities occur very locally within the nemoral zone.