Introduction of Mian Bi Xie:Seven-lobed Yam Rhizome or Rhizoma Dioscoreae Septemlobae.
✵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.
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, 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: Herbal classic book 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 (yam family) of the Liliales order. These 2 commonly used species are introduced:
(1).Dioscorea septemloba Thunb.
Botanical description: Dioscorea spongiosa J.Q.Xi.M.Mizuno et W.L.Zhao, is also known as Dioscorea septemloba Thunb., commonly known as Mián Bì Xiè. A perennial twining herbaceous vine. Rhizomes are amphitropous, branched, stout, 2~5 cm in diameter, the texture is loose when it is dried, spongy, the bark is sallow (grayish yellow), and has many slender fibrous roots. Stem is sinistral, and cylindrical. Simple leaves are alternate; Leaf blades are slightly coriaceous, and morphologically variable, basal leaves are palmate deeply cordate (palmarous deeply cordate), upper leaves are oval (egg-shaped), margin is undulated or entire, reticulated veins are conspicuous on the undersurface, both surfaces are sparsely covered with white hirsute.
The male inflorescence is axillary, racemose, male flower is petiolate, and its length with the perianth is 4~5 mm; Perianth is orange-yellow when it is fresh, turns brown when it is dried; 6 stamens, sometimes only 3 stamens are developed.
Capsularfruit is retroflexed and pendulous at maturity, wings are nearly semicircle (nearly semicircular), the apex is slightly emarginated, the base is rounded, 1.5~1.8 cm long, 1.2 cm wide. Seeds are oblate ovoid, 4~5 mm in diameter, surrounded by membranous wings. Its flowering period is from June to July, the fruiting period is from July to October.
Ecological environment: Dioscorea spongiosa grows in open forests or bushwoods, in areas at altitudes of 450~700 meters above sea level. The plant is distributed in the middle and lower reaches area of the Yangtze River, the Zhujiang River area, and other areas of China.
Characters of herbs: The rhizomes are mostly straight-cut or bevelled round slices, with irregular edges and in different sizes, 2~5 mm thick; the bark is brown to yellow-brown, thick, around parts are mostly curly, and there are sparse fibrous root residue and conical protrusion. The fracture surface is pale yellowish-white, grayish-white to light grayish-brown, coarse and rough. There are yellowish-brown punctate vascular bundles scattered on it. The texture of the herb is loose, slightly spongiform (spongoid), and easy to break. 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):
Administration Guide of Rhizoma Dioscoreae Septemlobae (Mián Bì Xiè)
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.
Botanical description: Dioscorea futschauensis Uline., is also known as Dioscorea futschauensis Uline ex R. Knuth., commonly known as Hóu Zi Shǔ. A perennial twining herbaceous vine. Rhizomes are amphitropous, irregularly long cylindrical, the bark is tawny (yellow-brown). Stem is sinistral, glabrous. Simple leaves are alternate; leaf blades are slightly coriaceous, morphologically variable, basal leaves are palmate deeply cordate (palmarous deeply cordate), different in size, 7-lobed, upper leaves are ovate-triangular, the margin is undulated or subentire, the undersurface has conspicuous reticulated veins, both surfaces are sparsely covered with white hirsute.
Flowers are unisexual and dioecious. The male inflorescence is axillary, racemose, usually paniculate, solitary, or 2~3 cluster in leaf axils; Male flowers are pedunculate, its length with corolla is 4~5 mm; the corolla is orange yellow when it is fresh, turns brown when it is dried; 6 stamens, sometimes only 3 stamens are developed.
Capsularfruit is retroflexed and pendulous at maturity, wings are nearly semicircle (nearly semicircular), the apex is slightly emarginated, the base is rounded, 1.5~1.8 cm long, 1~1.2 cm wide. Seeds are oblate ovoid, 4~5 mm in diameter, surrounded by membranous wings. Its flowering period is from June to July, the fruiting period is from July to October.
Ecological environment: The plant grows in thickets and forest edges on hillsides and mountain slopes, along gullies or roadsides, and in areas at altitudes below 700 meters above sea level. The plant is distributed in the lower reaches area of the Yangtze River, north area of the Zhujiang river, 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, sags and crests, tawny (yellow brown), with irregular wizzled hook lines and stem marks with scattered nodular protrusions. The texture of the herb is hard, it is difficult to break. The commodities are mostly cut into thin slices, 2~3 mm thick, the fracture surface is ash gray (gray-white) or yellowish-white, powdery, and there are dotted vascular bundles scattered. The texture of the herb is loose, and slightly spongiform (spongoid). The herb has a slight odor, it tastes slightly bitter and pungent.
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1.Introduction of Mian Bi Xie:Seven-lobed Yam Rhizome or Rhizoma Dioscoreae Septemlobae.