Tanacetum isfahanicum (Compositae-Anthemideae), a new species from Iran and its phylogenetic position based on nrDNA ITS data

Tanacetum isfahanicum Sonboli and Naderifar (Compositae-Anthemideae) is described as a new species from Isfahan Fars provinces of Iran. It belongs morphologically to sect Xanthoglossa differs its the closest relative, T. polycephalum, by shape basal cauline leaves, capitula, length width involucre color achene ribs. The phylogenetic position within genus established based on nrDNA ITS sequences variation close relationship with polycephalum corroborated.