The distribution, morphometric and population characteristics of the invasive species Lupinus polyphyllus Lindl. in Republic of Bashkortostan are analyzed. Twenty-five localities of the species are identified and 11 invasive populations are examined in five districts of the republic. It is shown that the main vector of L. polyphyllus invasion is the drift of the species from horticultural crops, and spontaneous species dispersal along the roads is less common. The density of L. polyphyllus plants in cenopopulations ranges from 4.3 to 14.5 ind./m(2). The aboveground biomass of the species can reach 1 kg per 1 m(2) or more. The proportion of the species in the community ranges from 55.1 to 88.8%; the species dominates in most communities. When introduced into meadow phytocenoses, it forms a derivative community of Lupinus polyphyllus [Arrhenatheretalia elatioris]. It is established that the maximum values of the parameters are typical of populations growing in more favorable moisture conditions. The highest indicators of parameters are noted in the Bulat-Elga and Changakul cenopopulations; the minimum ones are in the Neftekamsk and Urazaevo cenopopulations. One generative shoot gives from 13 to 95 fruits and from 56 to 760 seeds; the total productivity of one plant reaches 4543 seeds. The vitality assessment shows that four cenopopulations are prosperous, one cenopopulation is equilibrium, and six are depressed. An increase in the number of localities of L. polyphyllus in the Cis-Urals of the Republic of Bashkortostan is predicted in the coming years.
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