Pinus sylvestris formations of bogs and transition mires of the Hercynian system, best represented in the Bohemian Quadrangle, with rare outposts farther west to the Vosges, with Betula pubescens, Betula carpatica, Frangula alnus, Sorbus aucuparia, Eriophorum vaginatum, Ledum palustre, Vaccinium uliginosum, Vaccinium oxycoccos, Andromeda polifolia.