Atlantic and medio-European forests dominated by Quercus robur or Q. petraea, on eutrophic or mesotrophic soils, with usually ample and species-rich herb and bush layers. Carpinus betulus is generally present. They occur under climates too dry or on soils too wet or too dry for beech or as a result of forestry practices favoring oaks.
Fragmentary mesophile or mesohygrophile formations of the Insubrian pre-Alps, the Ligurian Apennines, the Esterel and the Tanneron and very locally, the southern French Alps (forêt du Saou, Drôme), with Quercus petraea, Q. robur, Fraxinus excelsior, Tilia platyphyllos, T. cordata and Carpinus betulus, developed on deep soils in conditions of sufficient atmospheric and edaphic humidity.