This alliance includes vegetation of forest springs over acidic to slightly alkaline bedrock. The herb layer is well developed. The cover of the moss layer varies according to the frequency of disturbances and the degree of canopy opening. The herb layer is mostly dominated by Cardamine amara subsp. amara et austriaca. Carex remota. C. sylvatica. Chrysosplenium alternifolium. C. oppositifolium and Petasites albus, which are accompanied by mesophilous forest species. The vegetation of this alliance occurs in beech, oak-hornbeam and wet spruce forests or in alder carrs. It occupies gravelly or muddy soils which are supplied by ground water with stable temperature throughout the year.