Hyrcanian Forests The Hyrcanian forests cover the northern slopes of the Alborz and Talesh mountains from the Caspian Sea up to 2800m and belong to the temperate deciduous forests. The climate is humid subtropical. The rate of humidity and precipitation is high. (600-2000mm per year and decreases from west to east). These forests belong to the Euro-Siberian bio geographical region. The most important and domainant trees of these forests are Quercus castaneifolia , Quercus macranthera , Alnus glutinosa , Fagus orientalis , Carpinus betulus , Fraxinus excelsior and Parrotia persica . This region was not as badly affected as other forests and hence a number of relict species belonging to the Arcto-Tertiary flora still remain in these forests, such as Acer velutinum , Gleditsia caspica , Parrotia persica , Quercus castaneifolia, Pterocarya fraxinifolia , and Zelkova carpinifolia . Of conifers only 2 varieties exist: Juniperus communis and Taxus baccata. These forests are divid...
