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

This paper presents the chromosome numbers (2n) for 13 alien species from the families Amaranthaceae, Asteraceae, Brassicaceae, Caryophyllaceae, Malvaceae, Poaceae, Polygonaceae, Rosaceae collected in the Novosibirsk Region. For Echinops sphaerocephalus L. (2n = 30), Silphium perfoliatum L. (2n = 14) and Brassica napus L. (2n = 38), chromosome numbers were determined for the first time on the material from Russia; for Arenaria serpyllifolia L. (2n = 40) – from Siberia; for Avena sativa L. (2n = 42), Secale cereale L. (2n = 14) – from West Siberia. Chromosome numbers on the material from the Novosibirsk Region were revealed for the first time for Axyris amaranthoides L. (2n = 18), Psammophiliella muralis (L.) Ikonn. (2n = 34), Fagopyrum tataricum (L.) Gaertn. (2n = 16), Triticum aestivum L. (2n = 42), Malva verticillata L. (2n ≈ 84). For all the species studied, brief notes on their general distribution and dispersal in the Novosibirsk Region are provided, along with literature data on chromosome numbers from other regions of Russia.