| Abstract: | Seven chromosome counts of six species from the family Asteraceae are reported. All taxa were collected from Hamedan province, Iran. One count is a new report (viz Inula aucheriana ), three are not in accordance with previous counts (viz Senecio glaucus, Tanacetum chiliophyllum and Tanacetum polycephalum ) and the others (viz Tripleurospermum disciforme, Tanacetum polycephalum , T. parthenium ) are confirmations of very limited (one to eight records) previous data. Most of the studied taxa have the basic number x=9, but Senecio glaucus has x = 10, with ploidy levels ranging from 2x to 8x. Both diploidy and triploidy were found in T. chiliophyllum and may be regarded as a sign of ongoing speciation. |
