Silene kucukodukii Y. Baǧci & Uysal sp. nov. from the Hadim, (C4 Konya-Turkey) is described and illustrated. It is closely related to S. sipylea O. Schwarz from which it differs morphologically mainly by the indumentum, leaf and floral features. Diagnostic morphological characters are discussed and a key of related Silene L. species in Turkey is given. The geographical distribution of the new species and other related species is mapped. Notes are also presented on its ecology, biogeography and conservation status. A chromosome count on Silene kucukodukii has been carried out and the chromosome number is 2n=24. © 2007 The Authors.