New or rarely reported chromosome numbers in taxa of subtribe Artemisiinae (Anthemideae, Asteraceae) from Mongolia

摘要

This study encompasses 25 chromosome counts of 18 species in the subtribe Artemisiinae (tribe Anthemideae) of the family Asteraceae, from Mongolia. Most (15 species) belong to Artemisia, the largest genus of the subtribe, whereas the others come fromtwo genera very closely related to it: Ajania (two species) and Neopallasia (one species). Eleven counts are new reports, three are not consistent with previous reports and the remainder confirm scanty earlier information. The majority of the species have x = 9 as their basic chromosome number, but there are some taxa with x - 8. Ploidy levels range from 2x to 6x. The presence of B-chromosomes was detected in Ajania fruticulosa.