Chromosome numbers in some alien plant species of Novosibirsk Region: post III

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. Chromosome Region revealed Cosmos bipinnatus Cav. 24), Inula helenium 20), Sonchus oleraceus 18), Medicago sativa subsp. varia(Martyn) Arcang. 32), Rumex obtusifolius 20) Solanum nigrum 48). all studied, brief notes their general distribution dispersal are provided, along with literature data other regions of Russia.