Chinese rhubarb

plant

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In rhubarb: Related species
…of two species known as Chinese rhubarb (Rheum officinale and R. palmatum) have been used medicinally in China and Tibet since ancient times, primarily as a cathartic. Their purgative properties and yellow colour are derived from anthracene glycosides; they also contain high levels of calcium oxalate, which give a characteristic…
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