Introduction of Ge Gen:Radix Puerariae or Kudzuvine Root.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Kudzuvine Root, its English name, Latin name, property and flavor, its botanical source 2 plant species, ①.Pueraria lobata(Willd.) Ohwi, ②.Pueraria thomsonii Benth., with a detailed introduction to the botanical features of these two plants, the growth characteristics, and ecological environment of these two plants, the features of the herb Kudzuvine Root, its pharmacological actions, medicinal efficacy, and administration guide.

Radix Puerariae(Kudzuvine Root).

Kudzuvine Root:herb photo Pin Yin Name: Gě Gēn.
 English Name: Kudzuvine Root, Lobed Kudzuvine Root.
 Latin Name: Radix Puerariae.
 Property and flavor: cool, pungent, sweet.

 Brief introduction: The herb Radix Puerariae is the dried root of Pueraria lobata(Willd.) Ohwi, or Pueraria thomsonii Benth.(family Legumonisae), used (1).to reduce heat in cases of exterior syndrome with fever and painful stiffness of the back and nape, (2).to relieve thirst in febrile diseases and diabetes mellitus, (3).to arrest diarrhea in spleen insufficiency, and (4).to promote eruption for measles. The herb is commonly known as Radix Puerariae, Kudzuvine Root, Gě Gēn.

 Botanical source: The herb Radix Puerariae(Kudzuvine Root) is the dried root of the (1). Pueraria lobata(Willd.) Ohwi, or (2). Pueraria thomsonii Benth., they are plants of the Pueraria Genus, the Fabaceae(Leguminosae) family of the Fabales order. These 2 commonly used species are introduced as:

(1).Pueraria lobata(Willd.)Ohwi.

 Pueraria lobata Willd. Ohwi.:plant photo Botanical description: The Pueraria lobata (Willd.) Ohwi., is a plant of perennial deciduous vine, it grows up to 10 meters. It is commonly known as Ye Ge or wild pueraria. The whole plant is brown with hair. Tuberous cylindrical, hypertrophy, skin gray, internal silty, fibrous very strong. Stems stout base, upper branches. Three out of the compound leaves; terminal petiole longer; leaves rhombus-shaped, 5.5~19 cm long, 4.5~18 cm wide, apex acuminate, base rounded, sometimes lobed, lateral leaflets are smaller, obliquely ovate, varies on both sides, pale back, with cream, both sides of the white abaxially pubescent; stipules shield-like students, ovate-oblong, small care needle-shaped. Racemes are axillary or terminal, Corolla is blue-purple or purple; bracts are narrowly linear, caducous, bractlets ovate or lanceolate; calyx campanulate, 0.8~1 cm long, 5 calyx teeth, lanceolate, above 2 teeth connate, longer than 1 tooth longer; petals subrounded or oval, apex dorsal, base with two short ears, wings are narrowly elliptic, shorter than the petals, often with basal auricles, keels slightly longer than the petals; 10 stamens, body; ovary linear, style is curved. Pods are linear, 6~9 cm long, 7~10 mm wide, densely tanned hirsute. Seeds are oval, auburn, shiny. Its flowering period is from April to August, fruiting period is in October.

 Growth characteristics: Strong adaptability, the plant can be cultivated in the sunny barren slope, forest edge, it is better to be cultivated in deep, fertile, loose sandy soil. The plant grows all over the country.

 Characters of herbs: The kudzu herb is a straight-cut rectangular thick piece or small cubes, with a length of 5 ~ 35 cm and a thickness of 0.5 ~ 1 cm. The cortex ​is light brown to brown, the cortex is rough, with longitudinal wrinkles. The surface of the cross-section is yellowish white to yellowish brown, and some textures are obvious. The texture of the herb is tough, strong fibrous. It is odorless or smells slight, tastes slightly sweet.

 Pharmacological actions: ①. Effects on the circulatory system; ②. spasmolysis effect; ③. Hypoglycemic effect; ④. Antipyretic effect.

 Medicinal efficacy: Relieving muscles to expel heat, promoting eruption of measles, promote the production of body fluid to quench thirst, elevating Yang and relieve diarrhea, neutralize the effect of alcoholic drinks. The root contains flavonoid, the flavonoid has hyperglycemic, antihypertensive effect, dilate cardiovascular and cerebrovascular, enlarge breast and slim waist.

 Administration of Radix Puerariae(Gě Gēn): 
Reference: Administration Guide of Radix Puerariae(Gě Gēn)
TCM Books: ①.Internally:9~15 grams;②.water decoction,1.5~3 qian(about 4.5~9 grams),or extract juice.Externally:mashed and apply stick;③.water decoction, 10~15 grams, or extract juice.Externally:proper amount,mashed and apply stick.

(2).Pueraria thomsonii Benth.

 Pueraria thomsonii Benth.:plant photo Botanical description: The Pueraria thomsonii Benth., is a plant of vine. It is commonly known as Gan Ge Teng or sweet pueraria vine. Root hypertrophy. Stems are yellowish brown short hairs or miscellaneous hirsute. Leaves trimmed, long elliptic, hairy; leaflets lanceolate to broadly ovate, sometimes 3-lobed, 9~21 cm long, 8~18 cm wide, apex shortly acuminate, base graphics. Racemes axillary; bracteoles ovate; calyx campanulate, 1.2~1.5 cm long, 5 calyx teeth, lanceolate, longer than calyx tube, yellow hirsute; corolla purple, long 1.3~1.8 cm. Pods are long oval, flat; length 10~12 cm, width 1~1.2 cm, densely beige hirsute. Seeds are kidney-shaped or round. Its flowering period is from June to September, fruiting period is from August to October.

 Growth characteristics: The plant is cultivated or grows wild in mountain thickets and sparse forests, it has strong adaptability.

 Root of Pueraria thomsonii Benth:herb cubes Characters of herbs: The roots are cylindrical, spindle-like or semi-cylindrical, with a length of 12 ~ 15 cm and a diameter of 4 ~ 8 cm. Some are thick slices cut longitudinally or obliquely, with different sizes. The surface is yellowish white or light brown, and the one without cortex or skin is grayish brown. Light brown concentric rings formed by fibers can be seen in the cross-section(transverse section), and several longitudinal stripes formed by fibers can be seen in the longitudinal section. The texture of the herb is hard, powdery or rich in powder content. The herb which is large, the texture is hard, white, with sufficient powder content and less fiber is the better.
Pungent-cool Exterior-releasing Herbs.

 Introduction: Pungent-cool exterior-releasing herbs: an agent or substance herbs pungent in flavor and cool in property, which is usually used for treating a wind-heat exterior syndrome.
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