Forests of Quercus robur or Q. petraea on acid soils with an herb layer mostly constituted by the ecological groups of Deschampsia flexuosa, Vaccinium myrtillus, Pteridium aquilinum, Lonicera periclymenum, Holcus mollis, and of Maianthemum bifolium, Convallaria majalis, Hieracium sabaudum, Hypericum pulchrum, Luzula pilosa, and the mosses Polytrichum formosum and Leucobryum glaucum.
Forests or tall coppice of Quercus robur or Quercus petraea of the Pyrenees and northwestern Iberia, with an often species-poor herb layer formed by the groups of Deschampsia flexuosa and of Hypericum pulchrum, by Ruscus aculeatus and often various ericaceous plants including Daboecia cantabrica.