“…R. emodi is distributed in the Himalaya, Kashmir, Pakistan, Himachal Pradesh, Nepal, Bhutan, Tibet, Kangra, Kullu, Kumaon and Sikkim etc. at altitude of 3300 to 5200 meter [11,17,28] . R. officinale (medicinal rhubarb) and R. palmatum (Chinese rhubarb) is distributed in the adjacent territory of south east Tibet, North-West China and Assam.…”