High invasive potential in North America is peculiar to 84 species of vascular plants native to Ukraine, which are recognized as invasive at national and regional (states, provinces and territories) levels. The list of taxa has been analyzed from the viewpoints of their taxonomic position and modern phylogenetic placement. These species belong to 38 families and 66 genera. By the number of species, the following families prevail: Asteraceae (14 species, 16.7 %), Poaceae (9 / 10.7 %), Brassicaceae (6 / 7.1 %), Lamiaceae (4 / 4.8 %), Apiaceae (3 / 3.6 %). Best represented are the genera Carduus, Centaurea, Pilosella (3 species each), Acer, Galium, Euphorbia, Linaria, Lisymachia, Lythrum, Ranunculus, Rumex, Viburnum, Vincetoxicum (2 species each). Most species belong to the subclasses Asteridae (37 species of 12 families) and Rosidae (17 species of 10 families). These and other results of taxonomic analysis support the hypothesis on the prevalence of invasive species among species-rich, morphologically diverse and phylogenetically advanced families and genera.
Keywords: invasive species, taxonomic analysis, phylogeny, flora, Ukraine, North America
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