Despite the increase in the number of studies of pine-shrub-sphagnum bogs (riams) of the northern taiga subzone of Western Siberia in recent decades, the full extent of their biogeocenotic diversity remains unknown. During field work conducted in the southern part of the Numto Nature Park that included geomorphological, phytocenotic, and soil studies, 6 subtypes of riams were identified and characterized: typical (“central image”), interspersed with small hollows, lakeside, shallow-layered, lichen (regressive), and oligo-mesotrophic. Their association with peat soils was determined, and the species diversity of the vegetation of these biogeocenoses was revealed. A total of 26 species of vascular plants, 57 species of bryophytes and 69 species of lichens were noted on the surveyed sites. The assessment of the identified subtypes using the ecological scales of H. Ellenberg allowed us to differentiate them by a number of ecological factors and soil properties (illumination, temperature, continentality, and among soil properties – humidity, acidity, and nitrogen content). Significant differences between the subtypes were established for soil temperature and humidity, as well as for the illumination factor. The lakeside riam subtype is characterized by increased heat supply of biogeocenoses relative to other subtypes. The subtypes of shallow-layered and lichen riam are distinguished by the lowest indicators both in terms of humidity and continentality, which may determine the low species diversity of these subtypes. In turn, the most illuminated subtypes include the central image of the riam and the lakeside riam. The lakeside riam is also characterized by the lowest scores on the acidity and nitrogen richness scales of the soils