This association comprises montane acidophilous beech forests. In addition to the dominant Fagus sylvatica, Picea abies is frequent in the tree layer. The shrub layer is poorly developed and usually composed of tree regeneration. The herb layer is typically dominated by Calamagrostis villosa, locally also C. arundinacea, and it contains various montane species. This association occurs on nutrient-poor acidic soils at altitudes of 800–1150 m.