Medicinals

shān dòu gēn / 山豆根 / 山豆根 / bushy sophora [root];

Latin pharmacognostic name: Sophorae Tonkinensis Radix

Alternate English names: Tongkingese [root]; Vietnamese sophora [root]

Alternate Chinese names: 山大豆根 shān dà dòu gēn; 黄结 huáng jié; 广豆根 guǎng dòu gēn

Origin: Plant

Use: medicinal

Category: Heat-clearing agents / Heat-clearing toxin-resolving agents

Properties: Bitter; cold; toxic.

Channel entry: lung and stomach channels.

Indications:

Dosage & Method:

Oral: 3–6g in decoctions. For external use it can be decocted to make a wash or can be applied as a powder.

Warning:

Unsuitable for spleen-stomach vacuity cold with reduced eating and sloppy stool. Shān dòu gēn is toxic, and excessively high doses can cause diarrhea, vomiting and retching, oppression in the chest, and heart palpitations.

Product Description:

This root is cylindrical, 10–15 cm long and about 7 mm in diameter, and often has branch roots. It is blackish brown in color, with coarse longitudinal wrinkles and long transverse lenticels that protrude slightly. It breaks to leave a granular fracture. The decocting pieces are thin oblique slices, whose cut face is smooth and light brown with annular markings.

Quality:

Fat farinaceous roots are the best.

Product Area:

Jílín, Guǎngdōng.

Etymology:

The name shān dòu gēn 山豆根, literally ""mountain bean root,"" is so named because the plant trails like a bean plant.

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