Neutrophile fir forests of the montane or submontane levels of the northern, western, southwestern and southern outer Alps, the western Carpathians, the northern Apennines, the Pyrenees, the Jura and the Hercynian arc, developed in stations sufficiently favourable to beech, dominated by Abies alba accompanied to a varying extent by Fagus sylvatica and Picea abies and with a species cortège identical to that of the montane beech forests of units G1.63, G1.64, G1.67.