Shrub hummocks of Atlantic and sub-Atlantic lowland or low montane boreal Europe, of the European Hercynian ranges, the Alps, the Pyrenees, the Carpathians, and their periphery, dominated by ericoid shrubs of genus Vaccinium, mostly Vaccinium uliginosum, also Vaccinium vitis-idaea or Vaccinium myrtillus, locally, in particular, in Scandinavia and the Alps, associated with Betula nana.