The Hyrcanian region is a typical Arcto-Tertiary relict area with over 3,200 vascular plants documented. Due to its isolation, the property hosts many relicts, endangered, and endemic plant species, contributing to the ecological significance of the property, and the Hyrcanian Region in general. Approximately 280 taxa are endemic and sub-endemic for the Hyrcanian Region including species such as Parrotia persica, Zelkova carpinifolia and Pterocarya fraxinifolia and about 500 plant species are Iranian endemics (IUCN, 2019; World Heritage Committee, 2019).