Chromosome numbers of alien species in the flora of Republic of Altai. Post VIII

Chromosome numbers (2n) of 13 alien plant species from the families Asteraceae, Balsaminaceae, Colchicaceae, Cucurbitaceae, Fabaceae, Lamiaceae, Ranunculaceae, Rubiaceae, and Vitaceae are reported based on the material collected in Republic of Altai. To determine chromosome number (ploidy level), the method of direct counting in metaphase on root meristem was used. Among the species studied, chromosome numbers for Lamium maculatum (2n = 18), Clematis terniflora (2n = 32), Galium aparine (2n = 22) were first examined for Russian Federation; for Colchicum speciosum (2n = 38), Aquilegia vulgaris (2n = 14) – first for Asian Russia; for Impatiens parviflora (2n = 26), Thladiantha dubia (2n = 18), Galium mollugo (2n = 44) – first for Siberia; for Impatiens glandulifera (2n = 18) – first for West Siberia; Cyclachaena xanthiifolia (2n = 36), Solidago canadensis (2n = 18), Trifolium hybridum (2n = 16) were first studied for Republic of Altai. General distribution and the history of floristic findings of these species in Republic of Altai are given. Previously published data on chromosome numbers from Russia are cited.