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Radix Cynanchi Atrati/blackend Swallowwort Root

[Chinese medicine name] baiwei [English name] Cynanchi Atrati Radix Et Rhizoma. [Source] Roots and rhizomes of Cymbidium Cynanchum atratum Bge. [Phytomorphology] Perennial herb, 40-70 cm tall, with white latex in the plant body. Short rhizomes, clusters of most slender strip roots, roots up to...

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[Chinese medicine name] baiwei

[English name] Cynanchi Atrati Radix Et Rhizoma.

[Source] Roots and rhizomes of Cymbidium Cynanchum atratum Bge.


[Phytomorphology] Perennial herb, 40-70 cm tall, with white latex in the plant body. Short rhizomes, clusters of most slender strip roots, roots up to 20 cm or more, diameter 2 to 3 mm, yellowish outer skin. Stems erect, cylindrical, densely gray pubescent. Leaves opposite, shortly stalked, leaf blade ovate or ovate-oblong, apex shortly acuminate, base rounded, entire, white fur on both sides, especially on leaves dorsal and veined. The majority of flowers are densely integrated into an umbrella cyme, the flowers are dark purple, the corolla is 5 cracked, and they are equal in length to the meroid column, with one pollen per room. Ying Ying fruit. Most of the seeds, species hair white.


[Place of Origin] Born on the edge of a hill or woods. Distributed in Heilongjiang, Jilin, Liaoning and other places.

[Harvest processing] Excavate the roots in spring and autumn to remove residual stems and mud and dry them.


[Herb traits] Cylindrical, nodules, 1.5 to 5 cm in length and 0.5 to 1.2 cm in diameter. Above the stem base can be seen, the diameter of more than 5 mm, below and on both sides of the cluster of slender roots like a horsetail.

Pharmacological studies steroidal polysaccharide glycosides can increase myocardial contractility and heart rate; water extracts have a certain expectorant effect, and no antitussive and asthmatic effects. Toxicity: LD50 of 7.5 g/kg for ethanol injection in the abdominal cavity. With fever, anti-inflammatory and other effects.


[chemical composition] The main root contains cardiac glycosides, volatile oil, etc., the main component of volatile oil is Bletuxue, cardiac glycosides as the main component of the polysaccharide glycosides. In addition, it includes erbium versicolor, Bletilla riboside A, acetonin A, β-arbutin acetate, ethyl oleate, and β-sitosterol.


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