Generally stable adult populations on poor, acidic and not very productive substrates, mainly composed by sessile oak (dominant species) and predominantly accompanied by chestnut but also by other broadleaf trees. It is also important to note the decay of several oaks probably induced by drought and, later, by secondary fungal infections.
Phyteumo betonicifoliae-Quercetum typicum
Phyteumo betonicifoliae-Quercetum festucetosum variae
Phyteumo betonicifoliae-Quercetum vaccinetosum