Biosystematics and phylogeny of Tanacetum fisherae, a new record from Iran

The chromosome number (2n=5x=44+1b) 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 45 expected in an x=9-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. fisherae is also discussed.