Hypericum ekerii Yuce & Aytac sp. nov. (Hypericaceae) is described and illustrated from Duzgun Baba Mountain in Eastern Anatolia, Turkey. The new taxon grows on volcanic rocks in Tunceli Province. It is closely related to H. capitatum Choisy s.l. an Irano-Turanian element of Anatolia. Diagnostic morphological characters were discussed. The pollen characters of threetaxa were examined by scanning electron microscopy (SEM).