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Medulla Tetrapanacis

[Chinese medicine name] tongcao [English name]Tetrapanacis Medulla [Source] Araliaceae plant Tapwood Tetrapanax papyriferus (Hook.) K.koch stem pulp. Plant morphology: Shrubs or small trees, young branches, dorsal leaves and inflorescences white or brown stellate hairs. Pith, white, paper....

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[Chinese medicine name] tongcao

[English name]Tetrapanacis Medulla

[Source] Araliaceae plant Tapwood Tetrapanax papyriferus (Hook.) K.koch stem pulp.

Plant morphology: Shrubs or small trees, young branches, dorsal leaves and inflorescences white or brown stellate hairs. Pith, white, paper. Leaves large, clustered at the top of stems, 50 to 70 cm in diameter, 5 to 11 palmately divided, each lobe has 2 to 3 cracks, base cordate, entire or coarsely toothed; petiole thick and long; stipules membranous, Tapered, connate at base. Most globular umbels integrate large panicles; flowers small, calyx obscure; petals 4, white; stamens 4, lower ovary, 2-celled, styles 2, free. Stone-fruited berry flat spherical, purple-black. Flowering from October to December.

[Place of origin] Born in sunny slopes, houses, roadsides, and mixed forests. Distributed in Hunan, Hubei, Fujian, Taiwan and other places.

[Harvesting and Processing]After harvesting stems in autumn, cut them into sections, remove freshly harvested marrow, straighten and dry them. The stem medulla is processed into square slices, called "Tong Tong Grass." Cut the side strips and call it "silk grass."

[Herb traits] Cylindrical, 20 to 40 cm long and 1 to 2.5 cm in diameter. The surface is white or light yellow with a shallow vertical groove pattern. Lightweight, soft, slightly elastic, easy to break, flat section, silvery white sheen, hollow in the middle of a 0.3 to 1.5 cm diameter hollow or translucent film, longitudinal profile was ladder-like arrangement, rare solid. Gas slightly, tasteless.

Pharmacological studies have a beneficial effect on urinary potassium excretion.

[chemical composition] contains inositol. It contains about 14.3% polypentose, about 3% polymethylpentose, and arabinose, glucose, fructose, lactose, pectin, galacturonic acid, ash, fat, pentosan and uronic acid. It also contains 13 amino acids such as aspartic acid, threonine, glutamic acid, and phenylalanine, and 18 trace elements such as calcium, strontium, magnesium, and iron, as well as lignin.

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