International Journal on Minority and Group Rights. Том 10. 2003. С. 203-220
The article discusses 20 adventive American plant species of the family Compositae, registered in the territory of the Oryol region. These species are analyzed according to the time and method of penetration, degree of naturalization, categories of occurrence. 4 species ( Erigeron annuus, E. canadensis, Solidago сanadensis) are the most aggressive, are implemented in the natural community and convert them.