Introduction of Liao Da Qing Ye:Indigoplant Leaf or Folium Polygoni Tinctorii.

TCM Herbalism:Medicinals and Classifications. ✵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:Herbs Clearing Heat and Counteracting Toxins.

 TCM Herbs Icon05 Introduction: Herbs Clearing Heat and Counteracting Toxins: an agent or substance herbs that counteracts heat toxins or fire toxins, mainly indicated in the treatment of boils, sores, abscess, erysipelas, epidemic infectious diseases, mumps, dysentery, insect or snake bite, and burns.

 
Folium Polygoni Tinctorii(Indigoplant Leaf).

Folium Polygoni Tinctorii Pin Yin Name: Liǎo Dà Qīnɡ Yè.
 English Name: Indigoplant Leaf.
 Latin Name: Folium Polygoni Tinctorii.
 Property and flavor: warm, pungent, sweet.

 Brief introduction: The herb Folium Polygoni Tinctorii is the dried leaf of Polygonum tinctorium Ait.(family Polygonaceae), used as dyers woad leaf with stronger effects. The herb is commonly known as Folium Polygoni Tinctorii, Indigoplant Leaf, Liǎo Dà Qīnɡ Yè.

 Botanical source: The herb Folium Polygoni Tinctorii(Indigoplant Leaf) is the dried leaf of (1). Polygonum tinctorium Ait., it is a plant of the Polygonum L. genus, the Polygonaceae family of the Polygonales order. This commonly used species is introduced as:

 Polygonum tinctorium Ait. (1).Polygonum tinctorium Ait.:
 Botanical description: It is commonly known as Liao Lan. Annual herbs. Stem erect, usually branched, 50~80 cm tall. Leaves ovate or broadly elliptic, 3~8 cm long, 2~4 cm wide, dark blue-green when dried, apex rounded obtuse, base broadly cuneate, margin entire, margin shortly hairy, glabrous above, sometimes sparsely puberulent below along leaf veins; Petiole 5 ~ 10 mm; Stipules membranous, slightly loose, 1~1.5 cm long, covered, apex truncate, with long ciliate hairs. Racemes spicate, 2~5 cm long, terminal or axillary; Bracts funnelform, green, ciliate, each bud containing 3~5 flowers; Pedicels fine, subequal with bracts; Perianth 5-lobed, reddish, tepals ovate, 2.5~3 mm long; 6~8 stamens, shorter than perianth; 3 styles, lower connate. Achene broadly ovate, 3-rowed, 2~2.5 mm long, brown, glossy, enveloped in persistent perianth. It is flowering from August to September, fruiting from September to October.

 Polygonum tinctorium Ait. Ecological environment: Indigo prefers a warm and humid climate and is not strict with soil requirements. It prefers well-drained, humus-rich loam, clay loam, and sandy loam, followed by clay, sand, and gravel soil, which is not suitable for the growth of indigo. It grows wild in the wilderness ditch edge, mostly for cultivation or semi-wild state. The plant distributes in China, also in Europe. The plant is cultivated or grows in a semi-wild state in the north and south provinces of China, the plant distributes naturally in the north and northwest areas of China, and other areas.

 Growth characteristics: The plant Polygonum tinctorium Ait grows wild in the wilderness, at the ditch side, mostly for cultivation or semi-wild state.

 Characters of herbs: Leaves wrinkled or broken, blue-green or blue-black, mid-vein yellowish to yellowish brown. Leaf blade elliptic, 3~10 cm long, 2~5 cm wide, apex obtuse, base gradually narrow, entire, veins abaxially prominent, lateral veins obvious, lighter color; Petiole flattened, ca. 1 cm long, basally clasped, with membranous stipules. Brittle and fragile. The breath is weak, the taste is light and bitter. Dry stem, thick leaves, color blue and green, no branch stem for the better.

 Pharmacological actions: ①.Inhibition on pathogenic microorganisms, ②.Antipyretic action, ③.Anti-inflammatory and immunological effects, ④.Effects on cardiovascular function, ⑤.Anti-platelet aggregation, ⑥.The effect on smooth muscle.

 Medicinal efficacy: Clear heat and detoxify, cool blood and eliminate spots. It is indicated for fever of warm disease, macula and rash, hematemesis and epistaxis, pulmonary heat and asthma cough, pharyngitis, mumps, heat dysentery, jaundice, erysipelas, canker(mouth sores), carbuncles on superficies, etc.

 Administration of Folium Polygoni Tinctorii(Liǎo Dà Qīnɡ Yè): 
 
Reference: Administration Guide of Folium Polygoni Tinctorii(Liǎo Dà Qīnɡ Yè)
TCM Books: Internally:9~15 grams.Externally:fresh herbs proper amount, mashed and apply stick at affected area(CP),Internally:water decoction, 9~15 grams, fresh herb 15~30 grams, or extract juice and drink.Externally:proper amount, mashed and apply stick, or mashed and smear(CHMM).

 
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References:
  • 1.Introduction of Liao Da Qing Ye:Indigoplant Leaf or Folium Polygoni Tinctorii.
  • 2.TCM Books:DCTM(Dictionary of the Chinese Traditional Medicine),CHMM(Chinese Herbal Materia Medica).

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