Rhubarb is a perennial member of the family Polygonaceae, so it is related to buckwheat and knotweed. This plant’s ancestry lies in the western and northwestern provinces of China and in Tibet, where it has been used medicinally for close to 5,000 years. There are many forms of wild rhubarb – all members of the genus Rheum are considered to be rhubarb of one form or another.
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