Abstract
Artemisia obtusiloba Ledeb. collected near the confluence of the Katun River and the Chuya River, Mt. Altai (50°23′38″, 26°40′39″) showed the hexaploid chromosome number and karyotype of K(2n=54)=36m+10st+8stsat. The plants of this population have not shown to be sympatric with any members of the Chrysanthemum fruticulosum complex. Thus, the present chromosome number and karyotype of Artemisia obtusiloba from Altai Mts. were different from those of the individual plants collected in Wu Chuan County, Inner Mongolia Autonomous Region, the People′s Republic of China.
