Abstract: 【Objective】According to the adjusted List of National Key Protected Wild Plants,the species distributed in Inner Mongolia were statistically sorted out to form a list of national key protected wild plants distributed in Inner Mongolia,providing guidance and services for the protection of wild plants in Inner Mongolia.【Methods】According to the List of National Key Protected Wild Plants approved and released by the State Council on August 7,2021,the list of national key protected wild plants in Inner Mongolia was organized in accordance with the region′s current plant distribution. The floristic geographical components were studied using floristic research techniques.【Results】A list of national key protected wild plants distributed in Inner Mongolia was formed,including 47 species of national key protected wild plants,belonging to 26 families and 37 genera. Among them,there were 1 species of algae,2 species of fungi,1 species of bryophytes,1 species of gymnosperms,and 42 species of angiosperms. Nostoc flagelliforme Born. et Flah. and Aldrovanda vesiculosa L. were the only two species of wild plants under national first-class protection;the others were under national secondary protection. The families with the largest number of species in angiosperms were Poaceae and Orchidaceae,both of which were 7 species. And the genera with the largest number of species were Cypripedium L. and Elymus L.,both of which were 5 species. The life forms of spermatophyte were mainly perennial herbs,with a total of 28 species. And the ecotype was dominated by mesophytes,with a total of 23 species. The floristic geographical distribution of species included 8 types and 5 sub-types,most of which were North East Asian distribution species,gobi distribution species and pan-Arctic distribution species. There were 3 endemic or nearly endemic genus in Inner Mongolia,including Tetraena Maxim.,Potaninia Maxim. and Tugarinovia Iljin,and 11 endemic or nearly endemic species in Mongolian plateau.【Conclusion】The newly formed list of national key protected wild plants distributed in Inner Mongolia reflected the conservation status of wild plant in Inner Mongolia,as well as the background and characteristics of Inner Mongolia flora.

Key words: The national key protected wild plants, Inner Mongolia distribution, Species, Flora characteristics