Introduction of Wu Jia Pi:Slenderstyle Acanthopanax Bark or Cortex Acanthopanacis.

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:Dispelling Wind-Damp Herbs.

 TCM Herbs Icon06 Introduction: Dispelling Wind-Damp Herbs: an agent or substance herbs that dispels wind and damp, mainly for relieving rheumatism and related conditions.

 
Cortex Acanthopanacis(Slenderstyle Acanthopanax Bark).

Cortex Acanthopanacis Pin Yin Name: Wǔ Jiā Pí.
 English Name: Slenderstyle Acanthopanax Bark.
 Latin Name: Cortex Acanthopanacis.
 Property and flavor: slight sweet, warm, pungent, bitter.

 Brief introduction: The herb Cortex Acanthopanacis is the dried root-bark of Acanthopanax gracilistylus W.W. Smith(family Araliaceae), used to dispel wind-damp, strengthen the tendons and bones, and induce diuresis in the treatment of rheumatic conditions, and edema. The herb is commonly known as Cortex Acanthopanacis, Slenderstyle Acanthopanax Bark, Wǔ Jiā Pí.

 Botanical source: The herb Cortex Acanthopanacis(Slenderstyle Acanthopanax Bark) is the dried root-bark of Acanthopanax gracilistylus W.W. Smith, it is a plant of the Eleutherococcus genus, the Araliaceae(Aralia family) family of the Apiales(Umbelliflorae) order.

(1).Acanthopanax gracilistylus W.W. Smith.


 Acanthopanax gracilistylus W.W. Smith.01 Botanical description: The Acanthopanax gracilistylus W.W. Smith., is a plant of the Araliaceae(Aralia family) family and Eleutherococcus genus, it is commonly known as "Acanthopanax gracilistylus", or "Slender Acanthopanax", or "Xi Zhu Wu Jia", the herb is commonly named "Slenderstyle Acanthopanax Root-bark", deciduous shrubs, 2~3 meters tall; branches gray-brown, weak and pendulous, sprawling, glabrous, often sparsely retrorsely flattened at nodes. Leaves palmately compound, alternate on long shoots, clustered on short shoots; petiole 3~8 cm long, often with narrow spines; 5 leaflets, dilute to 3 or 4, centrally largest, obovate to oblanceolate, length 3~8 cm, width 1~3.5 cm, tip apex or shortly acuminate, base cuneate, glabrous on both surfaces, or sparsely bristles along vein, pale brown tufts between veins below, margin serrulate.

 Umbrella inflorescence axillary or solitary at short axillary apices, ca. 2 cm in diameter; peduncle length 1~2 cm; pedicel 6-10 mm long; calyx 5 dentate; flowers yellowish green, 5 petals, oblong-ovate, apex acute, open; 5 stamens, filaments slender; ovary 2-celled, 2 styles, separated or basally connate, stigma rounded.

 Acanthopanax gracilistylus W.W. Smith.02 Drupe berry-like, oblate spheroid, 5~6 mm in diameter, black at maturity, persistent style reflexes. 2 seeds, small, light brown. Its flowering period is from April to July, fruiting from July to October.

 Ecological environment: The plant grows on hillsides or in jungles. The plant mainly distributes in the Yellow River, the Yangtze River area, and the Zhujiang River area of China.

 Growth characteristics: The Acanthopanax gracilistylus prefers a mild and humid climate, shade, cold resistance. It is advisable to choose the alluvial soil or sandy loam with deep and fertile soil layer, good drainage, and slightly acidic soil on the slopes, hills, sprinkling edge, with damp and sun. Not suitable for planting in gravel, clay, or sandy soil.

 Characters of herbs: Root bark is irregularly rolled, 5~15 cm long, 0.4~1.4 cm in diameter, and 1~3 mm thick. The outer surface is gray-brown with vertical wrinkles and long lenticels; the inner surface is light yellow or grayish-yellow with fine vertical stripes. The brittle, broken section is not neat, dark grayish yellow. The smell is slightly fragrant and the taste is slightly spicy and bitter.

 Pharmacological actions: ①.anti-arthritis and analgesic effect, enhance the body's resistance to disease; ②.protective effect on radiation damage; ③.anti-diuretic effect; ④.anti-hypnotic effect; ⑤.regulates blood pressure; ⑥.lowers blood sugar, reduces vascular permeability; ⑦.excites rabbit small intestine and uterus; ⑧.kill filarial larvae.

 Medicinal efficacy: Dispel wind and dampness, invigorate the liver and kidney, strengthen muscles and bones, activate blood vessels. It is indicated for rheumatism arthralgia, weakness and flaccidity of muscles and bones, pain in waist and knee, infantile retardation of walking, physical weakness and thin, weakness and asthenia, edema, beriberi, bone fracture, traumatic injury of fall, wet and itching of the genital region, etc.

 Administration of Cortex Acanthopanacis(Wǔ Jiā Pí): 
 
Reference: Administration Guide of Cortex Acanthopanacis(Wǔ Jiā Pí)
TCM Books: Internally:4.5~9 grams(CP),Internally:water decoction, 1.5~3 qian(about 4.5~9 grams),infusing in wine or prepare to pill,powder.Externally:mashed and apply stick(DCTM),Internally:water decoction,6~9 grams,fresh herb double dosage, infusing in wine or prepare to pill,powder.Externally:proper amount,fumigation wash with water decoction,or grinded into powder and apply stick(CHMM).

 
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References:
  • 1.Introduction of Wu Jia Pi:Slenderstyle Acanthopanax Bark or Cortex Acanthopanacis.
  • 2.TCM Books:DCTM(Dictionary of the Chinese Traditional Medicine),CHMM(Chinese Herbal Materia Medica).

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