Information is provided on the settlement of a new invasive species Chondrilla laticoronata Leonova (Asteraceae) in the Astrakhan region and Stavropol Territory. It is assumed that the species settlement takes place along the roads and railways from Western Kazakhstan. The biological features related with the biogeographical and phylogenetic patterns of the genesis and dispersal of C. laticoronata, the uniqueness of karyotypic polymorphism and genome size, as well as morphological variability and molecular genetic polymorphism in its populations are discussed.

A.S. Kashin, A.S. Parkhomenko, I.V. Shilova