D2.221 - Niveau 5 : Bas-marais périalpins à Laîche noire, Laîche blanchâtre, Laîche étoilée et Laîche des tourbières
Acidophilous small sedge communities of the alpine and subalpine levels of the Alps and Alpine periphery, including the greater Hercynian ranges of the Bohemian Quadrangle, the Black Forest, the Vosges, the Central Massif, occupying wet gentle slopes and plateaux where melt water lingers or encircling small lakes on the landward, usually emerged, side of the Eriophorum scheuchzeri girdle. The sward is formed by Carex nigra, Carex canescens, Carex echinata, Juncus filiformis variously accompanied by Eriophorum angustifolium, Carex magellanica, Carex lachenalii, Carex norvegica, Carex panicea, Carex demissa, Phleum alpinum, Agrostis canina, Viola palustris, Parnassia palustris, Pedicularis palustris; the moss layer is formed by Scapania paludosa, Paludella squarrosa, Drepanocladus exannulatus, Drepanocladus revolvens, Drepanocladus intermedius, Calliergon stramineum, Calliergon sarmentosum, Willemetia stipitata, Sphagnum recurvum.