The paper presents results of a modern inventory of flora of the Kemerovo region and data on the study of the alien component the flora of Kuzbass. The flora of vascular plants of the Kemerovo region is represented by 1733 species, its alien fraction including 240 species (more than 13 % of the total composition. For each of 6 floristic districts of the region, the number and percentage of aboriginal and alien species are specified, including «original» species (growing only in this area). Invasive status of the species is analyzed. For 8 species, its change is recommended.

S.A. Sheremetova, I.А. Кhrustaleva