Subalpine and alpine flora of Altındere Valley (Maçka-Trabzon)

Subalpine and Alpine Flora of Altindere Valley (Maçka-Trabzon) Subalpine and alpine flora of Altindere Valley (Maçka-Trabzon) was determined in this study. The study area takes place in the Colchis sector of Euro-Siberian floristic area of the Holarctic region with regard to plant geography. 61 families, 190 genus and 385 vascular plant taxa belonging to Pteridophyta and Spermatophyta division have been determined in the study area. 374 taxa belonging to Spermatophyta division have been listed according to Davis and Cronquist and the other 1 1 ferns have been listed systematicly according to Parris and Fraser-Jenkins methods. 32 endemic and 9 rare taxa were determined in the study area. Endemic and rare plants determined in study area were classified according to IUCN threat categories. Among these plants Barbarea integrifolia DC. is in Endangered (EN) threat category. Taxa known their plant geography region could be ordered as follow: Floristic Regions Percentage Euro-Siberian % 50,13 Irano-Turanian % 5,97 Meditteranean % 1,82 25 plant taxa are new record for A7 square. Key words: Flora, Subalpine, Alpine, Trabzon, Altindere Valley