A new species Bolanthus turcicus Koc & Hamzaoglu, sp. nov. was discovered on Hasan Mountain (Turkey, Aksaray province) where it grows on volcanic stony slopes and alpine steppe. its description, images, chorology and ecology, and threat category are provided in this article. It was compared with a closely related species, Bolanthus minuartioides (Jaub. & Spach) Hub.-Mor., B. huber-morathii C. Simon, B. spergulifolius (Jaub. & Spach) Hub.-Mor., B. frankenioides (Boiss) Bark., B. mevlanae Aytac based on its general morphology and seed micromorphology.