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Names for Da Huang
Pharmaceutical: Radix et Rhizoma Rhei
Botanical: Rehum palmatum L., Rheum tanguticum Maximoxicz ex Regel, Rheum officinale Baillon (Polygonaceae)
Other names: Jan Jun, Sheng Chuan Jun, Sheng Jin Wen
Description: Rhubarb.

Purgative; Eliminates Heat; Disperses Fire; Expels toxins; Invigorates Blood; Eliminates Blood accumulation; ...

Origin of da huang
* Rheum palmatum L. et Rheum tangouticum Maxim. ex Reg.: Gansu, Qinghai. * Rheum officinale Baill.: South China (predominantly: Sichuan).;

Preparation of da huang
The drug is collected in late autumn when stem and leaves are withered or in next spring just before budding, removed from rootlet and the outer bark, cut into segment or section, either stringed together to be dried, or dried directly. The rhizome can also be processed with wine, carbonized, or steamed.;

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