Marmishou region, in northwest Iran, between the border Mountains of Iran and Turkey, has many habitats due to its climatic and ecological features and favorable weather conditions. In this area, with the significant presence of characteristic trees and shrubs of Zagros, plant elements of other regions and rangeland species of the Azerbaijani vegetation type are observed. In the Marmishou region, 248 plant species have been identified belonging to 168 genera and 53 families, including herbaceous, trees, and shrubs. From the point of view of chorotypes, trees and shrubs of the Marmishou region include 61.7% Irano-Turanian, 10.63% Euro-Siberian, 4.2% Mediterranean, and 21.2% multiregional. Forest green cover on mountain slopes, various rangeland ecosystems representing the vegetative climate of Zagros and Lake Marmisho in this region have created a beautiful landscape with many cultural values in addition to conservation and production functions.