Humid grasslands of soils poor in nutrients, unfertilised and with a fluctuating water level, of Western Europe, south to northwestern Iberia, of Northern Europe, of Central Europe, locally of western Eastern Europe, dominated by Molinia caerulea, with Succisa pratensis, Deschampsia cespitosa, Potentilla erecta, Allium angulosum, Allium suaveolens, Stachys officinalis (Betonica officinalis), Cirsium dissectum, Cirsium tuberosum, Dianthus superbus, Trollius europaeus, Galium boreale, Gentiana asclepiadea, Gentiana pneumonanthe, Gladiolus palustris, Silaum silaus, Selinum carvifolia, Inula salicina, Iris sibirica, Laserpitium prutenicum, Lathyrus pannonicus, Tetragonolobus maritimus, Serratula tinctoria, Carex tomentosa, Carex panicea, Carex pallescens, Parnassia palustris, Ophioglossum vulgatum, Dactylorhiza maculata, Festuca arundinacea, Festuca rubra.