Nonalluvial deciduous or semideciduous forests or woods of sub-Mediterranean climate regions and supra-Mediterranean altitudinal levels, and of western Eurasian steppe and substeppe zones of Ostryo-Carpinion alliance, dominated by Ostrya carpinifolia, Carpinus orientalis, Acer spp., Fraxinus spp., Tilia spp. or Celtis australis; like the thermophilous oak woods of unit G1.7, they may, under local microclimatic or edaphic conditions, replace the evergreen oak forests in mesomediterranean or thermo-Mediterranean areas, and irradiate far north into medio-European or sub-Atlantic regions.