?????????????????????? ?????????????? ?????????? ???????????????????????? ?? ?????????????????????? ???????????????? ???? ?????????????????????? Aster L. ?? ?????????????????????? ?????????? (Astereae: Asteraceae), ?? ???????????? ???????????????? ???? ?????????????????????? ?????? Symphyotrichum. ???????????????????????????????????? ?????????????? Symphyotrichum (S. novae-angliae, S. novi-belgii, S. x salignum ?? ????.) ???????????? ???????????????????????????? ?? ????????????, ?? ?????? ?????????? ?? ??????????????, ?? ?????????? ?????? ?????????????????? ?? ???????????????????????????????????? ?????????????????????? ?????????? ???????? ??????????????????????????????, ?? ???????????????????? ?????????????????????????? ????????????????????????????. ?? ?????????????? ???????????????????? ???????????????? ?????????? ?????????? Symphyotrichum, ?????????????????????????? ?????? ????????, ???????????????????? ?? ???????????????? ???? ????????????????????, ?????????????? ??????????????????????????. ?????? ???????? ??????????, ???????????????????? ???? ?????????? ??????????????, ???????????????????????? ???????????????????????????? ??????????????. ?????????? ???????????? ?????????????????????? ???????????????????????? ?????????????????????? ???????????????? ?????????????????????? ?? ?????????????????????????????? ?????????????????????????? ?????????? ???????????????????????????????????? "????????" ?? ??????????????.

The article provides a brief overview of historical and modern opinions on generic delimitation of Aster L. and related genera (Astereae: Asteraceae), with a special emphasis on the segregate genus Symphyotrichum. North American taxa of Symphyotrichum (S. novae-angliae, S. novi-belgii, S. x salignum, etc.) are widely cultivated in Europe, and in Ukraine in particular, and often occur as escaped and naturalized near cultivation sites, in disturbed and semi-natural habitats. 6 species of Symphyotrichum are definitely known in Ukraine, occurrence of additional 3 species reported as cultivated in the Transcarpathian region require confirmation. Nomenclatural citations and brief notes are given for all species reported for the flora of Ukraine. Considerations about further research of taxonomy and distribution of alien species of North American ??asters?? in Ukraine are provided.