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Polygonum chinense L.
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English Name |
China Knotweed, Chinese Knotweed |
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Latin name |
Polygonum chinense L. |
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Family & Genus |
Polygonaceae, Polygonum |
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Description |
Perennial herbs, about 1m. Stems nearly erect or slightly curvaceous with vertical edges, smooth or covered with sparse hair, branched. Leaves alternate, ovate or oblong, 5-10cm long, 3-6cm wide, apex acuminate, base truncate, entire, glabrous on top and bottom, or hair along the veins at the bottom; lower leaves petioles, auricles often at the base, upper leaves sessile or amplexicaul; bright green above with V-shaped pattern; sheath membranous, oblique and truncate. Capitulum present, formed into panicles or corymbs apical or axillary, with densely glandular rachis; bracts membranous, ovate, glabrous; flowers white, pink or purple; perianth 5 lobed, lobes ovate, expand when flowering; stamens 8; ovary superior, style 3. Achenes oval black, 3-ribbed, wrapped in persistent perianth. Flowering: July to September. Fruiting: August to October. |
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Distribution |
Growing in hills, on sunny slopes, forest edges and roadside moist soil. Can be cultivated. Distributed in Zhejiang, Fujian, Jiangxi, Guangdong, Guangxi, Taiwan, Yunnan, Sichuan, Guizhou and other provinces. The medicinal materials are mainly produced in Fujian, Guangdong, Guangxi and other provinces. |
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Part Used |
Medical parts: whole plant. Chinese Name: Huotanmu. |
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Harvest & Processing |
Excavated in summer and autumn, washed, sun-dried or used fresh. |
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Chemistry |
Contains flavonoid glycosides. |
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Pharmacology |
Anti-bacterial, anti-hepatitis B virus, anti-hypertensive, CNS-inhibitory. |
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Properties & Actions |
Pungent, bitter, cool, toxic.Clearing heat and draining dampness, cooling the blood and detoxifying. |
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Indications & Usage |
Used for diarrhea, dysentery, jaundice, pharyngalgia due to wind-heat, asthenia and dizziness, infantile summer fever, spasm, leucorrhea, anthracia and wet sores, injuries from falls.Oral administration: decocting, 25-50g; or pounded to extract juice. External application: smashed for applying or decocted for washing. |
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Examples |
1. Eczema: fresh China knotweed 25-50g. Decoct in water and swallow. Take fresh whole herbs again and decoct in water, and wash the outside.
2. Jaundice with damp-heat pathogen: China knotweed 25g, guangdong abrus 25g. Decoct in water and swallow.
3. Female profuse leukorrhea: fresh China knotweed 50g, white coxcomb 3-5. Add half a bowl of water, decoct and swallow after meals, 2 times a day. |
| Link to |
 Chinese Medicine Specimen Database
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Permanent URL：https://sys01.lib.hkbu.edu.hk/cmed/mpid/detail.php?herb_id=D00005 |
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