The Altai-Sayan Ecoregion is located at the interface of Siberian boreal forests and the Central Asia deserts. Such location contributes to the formation of rich diversity of flora and fauna species. The list of plants includes over 600 species of mosses, 1200 lichens, over 3500 species of vascular plants.700 species are rare or endangered, 317 - endemic. 76 species are included in the Red Data Book of Russia. 626 species (about 17%) grown in the Ecoregion are under regional protect.