The article presents new data on the distribution in the territory of Western Altai of 20 species of vascular plants from the families Asteraceae, Betulaceae, Boraginaceae, Crassulaceae, Huperziaceae, Grossulariaceae, Lamiaceae, Onagraceae, Orchidaceae, Papaveraceae, Polygonaceae, Ranunculaceae, Rosaceae, Saxifragaceae и Violaceae. All of them were collected in the highlands of the Korgon Range within the Altai Territory. Of these, Potentilla crebridens is reported for the first time for the Altai Territory and Western Altai; for other species, new localities are indicated. For the first time for the Korgon Range within the Altai Territory, Saxifraga terektensis, Viola tigirekica are presented, and the exact location of Potentilla nivea is noted. New localities of rare and protected species were discovered: Callianthemum sajanense, Huperzia appressa, Pyrethrum alatavicum, Saussurea baicalensis, Scutellaria altaica. For each species, the general distribution, ecology data are given, for some species, notes on the difference and differentiation of them from the closest taxa are indicated. If necessary, the locations of the species previously registered in the Western Altai are indicated. For the species included in the “Red Data Book of the Altai Territory”, we provide an information on the approximate number of individuals in the found populations. Based on the analysis of herbarium material, we exclude Potentilla nervosa from the list of flora of the Altai Territory.
New records of vascular plants in the West Altai