Introduction of Mian Bi Xie:Seven-lobed Yam Rhizome or Rhizoma Dioscoreae Septemlobae.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Seven-lobed Yam Rhizome, its English name, Latin name, property and flavor, its botanical source two plant species, ①.Dioscorea septemloba Thunb., ②.Dioscorea futschauensis Uline., with a detailed introduction to the botanical features of these two plant species, the growth characteristics, and ecological environment of these two plant species, the features of the herb Seven-lobed Yam Rhizome, its pharmacological actions, medicinal efficacy, and administration guide.

Rhizoma Dioscoreae Septemlobae(Seven-lobed Yam Rhizome).

Rhizoma Dioscoreae Septemlobae:herb photo Pin Yin Name: Mián Bì Xiè.
 English Name: Seven-lobed Yam Rhizome.
 Latin Name: Rhizoma Dioscoreae Septemlobae.
 Property and flavor: neutral in nature, bitter.

 Brief introduction: The herb Rhizoma Dioscoreae Septemlobae is the dried rhizome of Dioscorea septemloba Thunb., or Dioscorea futschauensis Uline(family Dioscoreaceae), used (1).to eliminate damp-turbidity in cases of chyluria and stranguria with turbid urine, and (2).to dispel wind-damp in cases of rheumatic arthritis. The herb is commonly known as Rhizoma Dioscoreae Septemlobae, Seven-lobed Yam Rhizome, Severlobed Yam, Mián Bì Xiè.

 Botanical source: Official herbal classics defined the herb Rhizoma Dioscoreae Septemlobae(Seven-lobed Yam Rhizome) as the dried rhizome of the species (1). Dioscorea septemloba Thunb., or (2). Dioscorea futschauensis Uline. They are plants of the Dioscorea L. genus, the Dioscoreaceae family of the Liliales order. These 2 commonly used species are introduced as:

(1).Dioscorea septemloba Thunb.


 Dioscorea septemloba Thunb.:climbing plant Botanical description: It is commonly known as Mián Bì Xiè. Perennial twining grass vine. Rhizomes transverse branched, stout, 2 ~5 cm in diameter, loosely spongy when dry, coat grayish-yellow, most slender fibrous roots. Stem sinistral, cylindrical. Single leaves alternate; Leaves slightly leathery, morphologically variable, base palmately deeply cordate, upper leaves ovate, margin undulate or entire, lower reticulate veins conspicuous, both surfaces sparsely white-hirsute. Male inflorescence axillary, racemose, male flowers sessile, 4~5 mm in length with the perianth; Perianth orange when fresh, brown when dry; 6 stamens, sometimes only 3 developed. Capsule reflexed and pendulous at maturity, wings nearly semicircular, apex slightly concave, base rounded, 1.5~1.8 cm long, 1.2 cm wide. Seeds oblate ovoid, 4~5 mm in diameter, surrounded by membranous wings. Its flowering period is from June to July, fruiting from July to October.

 Dioscorea septemloba Thunb.:growing plant Ecological environment: The plant grows at areas with an altitude of 450~700 meters above sea level. The plant distributes in the middle and lower reaches area of the Yangtze River, the Zhujiang river area, and other areas of China.

 Seven-lobed Yam Rhizome:herb photo Characters of herbs: The rhizomes are mostly longitudinal cut or oblique cut round slices with irregular edges and different sizes, with a thickness of 2~5 mm; the bark is brown to yellow-brown, thick, frizzy around, there are sparse fibrous root residue, conical protrusion. The fracture surface is light yellowish-white, grayish-white to light grayish-brown, coarse and rough. There are yellow-brown punctate vascular bundles scattered. The texture of the herb is loose, slightly spongy. The herb has a slight odor, it tastes slightly bitter.

 Medicinal efficacy: Remove dampness through diuresis, eliminate turbidity, dispel wind dampness, remove dampness and turbidity, dispel wind and relieve pain or numbness, eliminate swelling and detoxify the poison. It is indicated for gonorrhea and white turbidity, damp heat and sore poison, rheumatism and numbness pain, numbness and pain of waist and knee, sore and pain of waist and knee, urine turbidness, dripping urine, leukorrhoea, leukorrhagia(excessive leucorrhea), etc.

 Administration of Rhizoma Dioscoreae Septemlobae(Mián Bì Xiè): 
 
Reference: Administration Guide of Rhizoma Dioscoreae Septemlobae(Mián Bì Xiè)
TCM Books: ①.Internally:9~15 grams;②.Internally:water decoction,9~20 grams,or infusing in wine,or prepare to pill,powder.Externally:proper amount,mashed fresh herb and apply stick.

(2).Dioscorea futschauensis Uline.


 Dioscorea futschauensis Uline.:growing plant Botanical description: It is commonly known as Fú Zhōu Shǔ Yù. Twine grass vine. Rhizome transverse, irregularly long cylindrical, rind tawny. Stem sinistral, glabrous. Leaves alternate, slightly leathery, palmately lobed at the base of the stem, 7-lobed, unequal, deeply cordate at base, ovate-triangular above middle, margin undulate or entire, apex acuminate, deeply cordate or broadly cordate at base, abaxially reticulate veins conspicuous, sparsely white prickles along leaf veins on both sides.

 Flowers unisexual, dioecious. Male inflorescence racemose, usually paniculate, solitary or 2~3 clustered in leaf axils; Male flowers pedicellate, perianth orange when fresh, black when dry, 4~5 mm long, base connate, apex 6-lobed, lobes ovoid; 6 stamens, sometimes only 3 developed, inserted at base of perianth tube, with vestigial pistil. Female inflorescence similar to male inflorescence; Female perianth 6-lobed, staminodes anther incomplete or only filaments.

 Dioscorea futschauensis Uline.:growing plant Capsule triangular, winged, semicircular, 1.5~1.8 cm long, 1~1.2 cm wide; Seeds oblate, 4~5 mm in diameter, inserted in the middle axis of each compartment, with membranous wings all around when mature. Its flowering period is from June to July, fruiting from July to October.

 Ecological environment: The plant grows in thickets and forest margins on hillsides, along gullies or roadsides with an altitude below 700 meters above sea level. The plant distributes in the lower reaches area of the Yangtze River, north of Guangdong, Quanzhou of Guangxi, China.

 Characters of herbs: The rhizome is irregularly long cylindrical, 6~16 cm long, and 1~4.5 cm in diameter. The surface is uneven, yellow-brown, with irregular crinkle hook lines and stem marks with scattered nodular protrusions. The texture of the herb is hard and difficult to break. The commodities are mostly cut into thin slices with a thickness of 2~3 mm, the fracture surface is gray-white or yellowish-white, powdery, and there are dotted vascular bundles scattered. The texture of the herb is loose and slightly spongy. The herb has a slight odor, it tastes slightly bitter.
 
Diuretics and Hydragogues Herbs:Herbs Diuretics.

 Introduction: Herbs Diuretics: also known as damp-draining diuretic herbs,an agent or substance herbs that increases urine excretion and water discharge for treating internal retention of dampness.
 
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References:
  • 1.Introduction of Mian Bi Xie:Seven-lobed Yam Rhizome or Rhizoma Dioscoreae Septemlobae.

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