According to American Berthold Laufer, The Iranologist ( 1926) who has published a book about Iran, pistachio has been important from ancient times and the term pistachio in Greek, Latin and other European languages is derived from the name of Iranian pistachios. This old tree in Old Persian was called Pystaka and in Middle Persian or Pahlavi named as Pystak. And in modern Persian is pronounced as /peste/.. Pistachio is a plant that has been cultivated in Iran since ancient time. There has been wild Pistachio jungles in north east of Iran specially in the borders of Afghanistan and Turkmenistan. It is believed that Pistachio tree was domesticated and cultivated about 4-3 thousand years ago in Iran.