Two new taxa of Silene L. (Caryophyllaceae) from Turkey, Silene demirizii K. Yildiz & Cirpici sp. nov. and Silene marschallii C. A. Meyer subsp. anamasi K. Yildiz & Dadandi subsp. nov. are described and illustrated. Their taxonomic positions are discussed and they are compared with allied taxa. The distributions of the new and closely related species are mapped. Pollen grain and seed coat ultrastructure of the new and allied taxa were examined by SEM.