Introduction of Xu Chang Qing:Paniculate Swallowwort Root or Radix Cynanchi Paniculati.
✵The TCM herbalism is also known as pharmaceutics of Traditional Chinese Medicine, or Chinese pharmaceutics, is the branch of health science dealing with the preparation, dispensing, and proper utilization of Chinese herbs. It is majorly composed of Introduction of Chinese Medicinals, Classification of Chinese Herbs, Formulas, and Patent medicines.
Classifications of Herbs:Dispelling Wind-Damp Herbs.
Introduction: Dispelling Wind-Damp Herbs: an agent or substance herbs that dispels wind and damp, mainly for relieving rheumatism and related conditions.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species, are recorded in this category. These dispelling wind-damp herbs are briefly introduced separately:
Pin Yin Name: Xú Cháng Qīng.
English Name: Paniculate Swallowwort Root.
Latin Name: Radix Cynanchi Paniculati.
Property and flavor: warm, pungent.
Brief introduction: The herb Radix Cynanchi Paniculati is the dried root and rhizome of Cynanchum paniculatum(Bge.) Kitag.(family Asclepiadaceae), used to unblock collateral meridians, alleviate pain, relieve toxicity and reduce swelling for treating rheumatalgia, toothache, lumbago, traumatic injuries, dysmenorrhea, and eczema. The herb is also known as Paniculate Swallowwort Root, Radix Cynanchi Paniculati or Xú Cháng Qīng.
Botanical source: Official herbal classics and other famous herbal classics defined the herb Radix Cynanchi Paniculati(Paniculate Swallowwort Root) as the dried root and rhizome of (1). Cynanchum paniculatum (Bge.) Kitag. It is a plant of the Cynanchum Linn. Genus, Asclepiadaceae family, Contortae order. This commonly used species is introduced as:
(1).Cynanchum paniculatum (Bge.) Kitag.: Botanical description: It is commonly known as Xú Cháng Qīng. Herbs perennial erect, up to 1 cm root fine whisker, more than 50, its shape is like horsetail, with a special aroma. Stem slender and rigid, unbranched, glabrous or puberulent. Leaves opposite, sessile; Leaf blade lanceolate to linear, cm, 3~15 mm wide, apex acuminate, base narrowed, both surfaces glabrous or upper mask sparsely pilose, margin slightly reflexed, lashes, upper dark green, lower pale green; The main vein rises. Inflorescences paniculate, near apex leaf axils, up to 7 cm, with more than 10 flowers; Calyx 5 deeply lobed, ovate-lanceolate; Corolla yellow-green, 5-lobed, broadly ovate, spreading or outwardly reflexed; 5 coronas, yellow, fleshy, reniform, base united with stamens; 5 stamens, joined in simple form, anthers 2 locules, 1 pollen block per loci, pendulous arms short, flat extension; 1 pistil, ovary superior, composed of 2 free carpels, 2 styles, stigma pentagonal, apex slightly protuberant. Follicles are angular, simple growing ca. 6 cm, light brown surface. Seeds numerous, ovate and flattened, dark brown, apex with a tuft of long white hair. Its flowering period is from May to July, fruiting from September to December.
Ecological Environment: the plant grows in the grass on sunny slopes. Resources distribution: The plant distributes in the east, south, north, northwest, southwest of China.
Growth characteristics: The plant Cynanchum paniculatum has strong adaptability to climate and can be cultivated in all parts of the north and south. The soil is better with fertile, loose sandy loam.
Characters of herbs: Rhizome irregularly columnar, discoid, 0.5~3.5 cm long, 2~4 mm in diameter; Some of the top with cylindrical residual stem, 1~2 cm long, hollow section. Roots clustered at rhizome nodes, cylindrical, slender and curved, 10~16 cm long, 1~1.5 mm in diameter. Surface light yellow-brown to light brown, with fine longitudinal wrinkles, and fine fibrous roots; Brittle, easily broken, flour off, white or yellowish-white skin, cambium ring light brown, small wood. Smell, slightly pungent taste, cool. The whole grass is with roots, stems simple or rarely branched, 20~60 cm long, 1~2 mm straight; Surface yellowish-green, base slightly mauve, with fine longitudinal lines, or hairy; Slightly crisp quality, broken surface fiber. Leaves opposite, twisted, easily broken, long needle-shaped, whole, yellowish-green, with short or nearly sessile stalks. The strong fragrance is preferred.
Pharmacological actions: The herb Radix Cynanchi Paniculati has ①.Analgesic effect, ②.Sedative effect, ③.Blood pressure-lowering effect (it mainly comes from its component paeonol and other constituents not identified), ④.Lowering blood lipids. ⑤.The effect on smooth muscle: Its component paeonol has a significant anti-contraction effect on the isolated ileum contraction caused by acetylcholine, histamine, and barium chloride. ⑥.Antibacterial effect: It has inhibition on Staphylococcus aureus and Streptococcus A.
Medicinal efficacy: Dispel wind and eliminate dampness, relieve itching, relieve pain, relieve cough, relieve swelling, alleviate water retention, promote blood circulation and detoxify. It is indicated for rheumatic pain and numbness, stomachache distension fullness, stomachache, toothache, lumbago, rheumatic pain, epigastric pain, menstrual abdominal pain, injury of fall, chronic tracheitis, ascites(abdominal dropsy), edema, diarrhea, dysentery, enteritis, urticaria(nettlerash), eczema, venomous snake bite, etc.
Administration of Radix Cynanchi Paniculati(Xú Cháng Qīng):
Administration Guide of Radix Cynanchi Paniculati(Xú Cháng Qīng)
Internally:3~12 grams, decoct later(CP), Internally:water decoction,1~3 qian(about 3~9 grams), or prepare to pill, or infusing in wine. Externally:mashed and apply stick, or wash with water decoction(DCTM), Internally:water decoction, 1~3 qian(about 3~9 grams), better not decoct for long time, or prepare to pill, or infusing in wine.(CHMM).
1.Introduction of Xu Chang Qing:Paniculate Swallowwort Root or Radix Cynanchi Paniculati.
2.TCM Books:DCTM(Dictionary of the Chinese Traditional Medicine),CHMM(Chinese Herbal Materia Medica).