Thickets or scrub of the subalpine zone of the Alps, the Carpathians, the Jura, the Hercynian ranges dominated by shrubby species of genus Prunus or related genera, in particular, Prunus padus ssp. borealis (Padus petraea), often with Sorbus aucuparia ssp. glabrata, Betula carpatica, Lonicera nigra.