Distribution maps of the seven clusters of relevés. Symbols in the maps represent the sampling locations. Cluster A1 Corylus avellana forests. Cluster A2 Ostrya carpinifolia-Fagus sylvatica forests. Cluster B lower montane thermophytic Fagus sylvatica forests. Cluster C middle montane, slightly acidic Fagus sylvatica forests. Cluster D upper montane basiphytic Fagus sylvatica forests. Cluster E middle montane basiphytic Fagus sylvatica forests.Cluster F upper-montane acidophytic Fagus sylvatica forests.