These forests are dominated by Carpinus betulus and Quercus petraea agg. Their herb layer is often dominated by Carex pilosa and contains some species of subcontinental and Submediterranean distribution. The association is common at lower altitudes in the Carpathian part of the Czech Republic, with outlier occurrences also in the eastern part of the Bohemian Massif. Most stands are found on deep soils over flysch, but the range of soil conditions is broad.