Definition: Holarctic coniferous and boreo-subarctic birch forests on oligotrophic and leached soils in the boreal zone and at high-altitudes of mountains in the nemoral zone of Eurasia
Definition: Supramontane to subalpine low heath on calcareous skeletal soils, rocky outcrops, lapies and boulders of the Alps, the Apennines and the Dinarides
