Fig. 1

The phylogenetic tree of studied specimens of L. polyphyllus based on chloroplast intergenic non-coding spacer rpl32–trnL site. Colors of circles next to sample names correspond with petal coloration. First letters in a sample (specimen) name designate a population, and subsequent symbols (digits with low case letters) code a specific individual. In addition, population locations are specified by regions of Russia, barring those from Belarus and Canada. Genetically identical specimens are merged into common branches of the tree. The absence of geographical patterns within the tree allows to suggest multiple events of human-induced introduction.