The checklist of alien plants of the Crimean Peninsula, based on results of analysis of literature data and original research, is presented in the article. The adventive fraction comprises 375 species of vascular plants from 78 families, among them 76 archaeophytes and 299 kenophytes, comprising 13 % of total taxa of the regional flora. Its taxonomic, biomorfological structure (life forms), primary geographical origin, degree of naturalization and chronoelement distribution have been analyzed. According to the degree of naturalization, the group is represented by epoecophytes (122 taxa), colonophytes (120), ephemerophytes (89), and agriophytes (44). The following families prevail in the taxonomic spectrum: Asteraceae (49 taxa), Poaceae (32), Brassicaceae (24), Fabaceae (22), Rosaceae (15), Lamiaceae (14), Chenopodiaceae (14), Apiaceae (13), Solanaceae (12), Scrophulariaceae (11), and Amaranthaceae (10 taxa). A comprehensive analysis revealed the following features in the structure of the alien fraction of the Crimean flora: higher instability index (0.56), increase of the share of colonophytes (32.0 %) and ephemerophytes (23.7 %); prevalence of species of the Ancient Mediterranean (38.7 %), and Asian (20.0 %) origin; increase of the number of trees (up to 11.2 %) and shrubs (6.9 %), with dominance of annual (47.5 %) and perennial (24.8 %) species in the life form spectrum.

Keywords: alien plants, checklist, chronoelement, naturalization, geographical origin, life forms, Crimea

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