Mercuriali-Fraxinetum comprises mesic nutrient-rich forests dominated by Fagus sylvatica, locally mixed with the nutrient-demanding broad-leaved trees Acer pseudoplatanus and Fraxinus excelsior or the conifers Abies alba and Picea abies. The herb layer consists of forest generalists and nitrophilous species, whereas acidophytes are rarer than in other forests of the alliance Fagion sylvaticae. This association occurs on different bedrock types, but it is found especially on lower slopes where nutrients accumulate. It is common in the submontane and montane areas of the Czech Republic.