apiaceae, asteraceae, brassicaceae, caryophyllaceae, fabaceae, karyological study, lamiaceae, poaceae, species distribution, urticaceae, Botany, QK1-989

Chromosome numbers (2n) in 10 invasive plant species from the families Apiaceae, Asteraceae, Brassicaceae, Caryophyllaceae, Fabaceae, Lamiaceae, Poaceae and Urticaceae are reported on the samples collected in the Republic of Altai. Among them, chromosome complements were first examined in Asian part of Russia for Lapsana communis (2n = 14). Saponaria officinalis (2n = 28) and Lotus corniculatus (2n = 24) were studied first from Siberia. Six species: Conium maculatum (2n = 22), Bunias orientalis (2n = 14), Vicia hirsuta (2n = 14), Leonurus quinquelobatus (2n = 18), Digitaria ischaemum (2n = 36) and Setaria pumila (2n = 36), were studied first from the Republic of Altai. The most studied species are diploids. General distribution and the history of floristic findings of these species in the Republic of Altai are given. Previously published data on chromosome numbers based on the material from Russia are cited.