Geographical distribution
Global distribution
Iran, Turkey, Iraq, Syria, Cyprus, Turkmenistan, Pakistan, Afghanistan, Hungary, Greece, East Russia.
Distribution in Iran
West and East Azarbaijan, Kordestan, Kermanshah, Gorgan, Kerman, Hormozgan, Khorasan, Semnan, Sistan-va-baluchestan, Isfahan, Zanjan, Arak and Tehran.
Collection time
Roots of the 3 to 4 year old plants are collected in autumn and early winter and cut to 15-30 centimeters pieces after drying. These pieces are kept in dry places.
