Article

Potentilla greuteriana Kyriak., Kamari, Kofinas & Phitos is described as a new species of P. sect. Plumosistylae, known from two localities (summit Xerovouni and Langada gorge) on Mt. Taigetos (S Peloponnisos). The habitat of this new Potentilla species is black bituminous, deeply karstified limestone. The closest relative of P. greuteriana is P. arcadiensis, which is distributed on the neighbouring Mt. Parnonas (E Peloponnisos), but belongs, to P. sect. Crassinerviae. The main morphological differences between the new species and its related taxa of P. sect. Crassinerviae (P. ulrichii, P. nerimaniae, P. davisii) and P. sect. Plumosistylae (P. libanotica and P. isaurica) are discussed. Additionally, the conservation status of the new species is provided.