This paper presents the chromosome numbers (2n) for 13 alien species (from families Apocynaceae, Asteraceae, Brassicaceae, Fabaceae, Lamiaceae, Polygonaceae, Solanaceae) in Novosibirsk Region. For Vincetoxicum hirundinaria Medik. (2n = 22) and Sisymbrium altissimum L. 14), were determined first time on material from Russia; Betonica officinalis 16) – Asian Stachys annua (L.) 34) West Siberia. C...
