The flora of Köse mountains (Gümüşhane)

SUMMARY The Flora of Köse Mountains (Gümüşhane) In this study, it was investigated the flora of Köse Mountains which are situated in the boundary of Gümüşhane. The Mountains of Köse are on the road of Gümüşhane- Erzurum and located at a crossing region between Euro-Siberyan and Irano-Turan fioristic regions. At the end of this study, it was determined 343 genera and 953 species and subspecies belonging to 77 families from Köse Mountains. Two of these families are belong to Pteridophyta and the others are for Spermatophyta. Two families of Spermatophyta are belong to Gymnospermae class and the others Angiospermae class. The families have the greatest number of species in order, Compositae (Asteraceae), Labiatae (Lamiaceae), Cruciferae (Brassicaceae) and Scrophulariaceae. Astragalus, Verbascum and Salvia genera have a great deal of number species in order. The dispersion to fioristic regions of taxons is; 17,34 % Euro-Siberian, 26,63 % Irano-Turan, 3,44 % Mediterranean Regions. It couldn't be definited the fioristic regions of 53,99 % the part of taxons. The 130 taxons are endemic and the ratio of endemism is 13,75 %. The 212 taxons are new record for A7 square. Key Words: Flora, Köse Mountains, Gümüşhane VI