This vegetation type is composed predominantly of dwarf shrubs and Sphagnum magellanicum. S. rubellum and S. russowii forming small hummocks. It occupies central parts of ombrotrophic bogs. Water level is permanently high. The peat typically consists of undecomposed peat mosses and branches of small shrubs. In the Czech Republic this vegetation occurs mainly in the mountainous areas of the Bohemian Massif along the international border.