Meso-eutrophic swamp alder woods

Mesotrophic and meso-eutrophic [Alnus glutinosa] swamp woods of middle European and western Siberian, nemoral and sub-boreal, marshy depressions, with [Carex elongata], [Thelypteris palustris], [Dryopteris cristata], [Osmunda regalis], [Solanum dulcamara], [Calystegia sepium], [Ribes nigrum], [Calamagrostis canescens] and often, in acidocline variants, [Betula pubescens]. The constancy of [Carex elongata] is characteristic on the continent, less so in Britain. Tall sedges, [Carex paniculata], [Carex acutiformis], [Carex elata], often dominate the herb layer in the most humid types.