Rheum officinale (USA)

Rheum officinale Baill., Adansonia 10: 246 1872. ;

Rheum officinale is a rhubarb from the family Polygonaceae originating in Asia.

Rheum officinale is used in traditional Chinese medicine, where it is called yào yòng dà huáng (Chinese: 药用大黄), and is also a component in the North American herbal remedy called Essiac tea.

In modern medicine, R. officinale has been studied for the treatment of hepatitis B. However, a meta-analysis of published clinical trials concluded that the quality of existing studies was "poor", but further study of R. officinale in combination with interferon is "justified".[1]

(From Wikipedia on 20.5.14)
 

Rheum officinale Baill.
Chinese rhubarb, Tibetan rhubarb, Purging rhubarb, commonly used in medicine.
Photographed from UCBG, California
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