 Relict genera of the tertiary period can be frequently found in all the zones of North of Iran especially in Talysh.They are the Persian iron tree ("Parrotia persica"), the Lenkoran acacia ("Albizia julibrissin"), the basket oak ("Quercus castaneifolia"), the Caucasian persimmon ("Diospyros lotus"), the evergreen shrub "Ruscus hyrcana", the box tree ("Buxus hyrcana"), etc.There are 240 endemic species of plants in North and North West Iran and also south-east Azerbaijan.