Authors: MARYAM NADERIFAR, ALI SONBOLI, SHAHROKH KAZEMPOUR OSALOO

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

Keywords: Anthemideae, Asteraceae, morphology, new species, nrDNA ITS, Tanacetum

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