This suboceanic, ombrotrophic bog vegetation type is characterized by the dominance of Trichophorum cespitosum tussocks in the herb layer and Sphagnum papillosum and S. tenellum in the moss layer. Many suboceanic species common in western Europe are absent in this vegetation in the Czech Republic, but some of them (e.g. Erica tetralix and Lycopodiella inundata) do occur in places. This vegetation occupies permanently wet sites, often situated near bog hollows. In the Czech Republic, this association mainly occurs in the Jizerské hory Mountains, which receive the highest precipitation in the country.