علی سنبلی - Assistant Prof., Department of Biology, Medicinal Plants & Drugs Research Institute, Shahid Beheshti University, G.C., Evin, ۱۹۸۳۹۶۳۱۱۳, Tehran, Iran (E-mail: a-sonboli@sbu.ac.ir)
نیره اولنج - PhD Student, Department of Plant Science, Faculty of Biological Sciences, Shahid Beheshti University, G.C., Evin, ۱۹۸۳۹۶۳۱۱۳, Tehran, Iran
احمد پورمیرزایی - Researcher, Research Centre of Agriculture & Natural Resources of Kerman, Iran

The chromosome number (۲n=۵x=۴۴+۱B) of Tanacetum fisherae, as a new record from high mountains of southern Iran (Kerman province: Hazar mountain) is reported. A new ploidy level (pentaploidy) for the genus is presented for the first time. The studied population was aneuploid, having lost one chromosome out of the ۴۵ expected in an x=۹-based pentaploid. The distribution map, description and micromorphological characteristic of the achene are given. A taxonomic conclusion on the basis of molecular data and phylogenetic position of T. fisheraeis also discussed.

Asteraceae, Chromosome, ITS, Tanacetum, Xylanthemum