Introduction of Huang Yao Zi:Airpotato Yam Rhizome or Rhizoma Dioscoreae Bulbiferae.
✵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:Expectorants,Herbs for Resolving Heat-Phlegm.
Introduction: Expectorants,herbs for resolving heat-phlegm: an agent or substance herbs warm in property, used in treating disorders of heat-phlegm or phlegm-dampness.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species, kind of mineral, are recorded in this category. These expectorants, herbs for resolving heat-phlegm are briefly introduced separately:
Rhizoma Dioscoreae Bulbiferae(Airpotato Yam).
Pin Yin Name: Huánɡ Yào Zǐ.
English Name: Airpotato Yam Rhizome.
Latin Name: Rhizoma Dioscoreae Bulbiferae.
Property and flavor: plain, bitter.
Brief introduction: The herb Rhizoma Dioscoreae Bulbiferae is the dried rhizome of Dioscorea bulbifera L.(family Dioscoreaceae), used as a blood-cooling hemostatic for arresting various kinds of bleeding and to counteract toxins for treating boils and sores.
Botanical source: The herb Rhizoma Dioscoreae Bulbiferae(Airpotato Yam) is the dried rhizome of Dioscorea bulbifera L., it is a plant of the Dioscorea. Genus, the Dioscoreaceae family of the Liliflorae order. It is also known as Rhizoma Dioscoreae Bulbiferae, Airpotato Yam Rhizome or Huánɡ Yào Zǐ.
Common official herbal classics and other famous herbal classics defined the herb Rhizoma Dioscoreae Bulbiferae(Airpotato Yam) as the dried rhizome of:(1). Dioscorea bulbifera L. This commonly used species is introduced as:
(1).Dioscorea bulbifera L.: Botanical description: It is also known as Huang Du. Twine grass vine. Tubers are ovoid to oblong, nearly earthy, tan, surface dense with most slender fibrous roots. Stem cylindrical, sinistral, glabrous. Single leaves alternate; Petiole slightly shorter than blade; Leaf blade broadly ovate-cordate or ovate-cordate, 5~16~26 cm long, 2~14~26 cm wide, apex caudate acuminate, margin entire or microwave, both surfaces glabrous; Leaf axils have purple-brown globular or ovoid beads of different sizes (oligocytes), 1~3 cm in diameter, with rounded spots. Flowers unisexual, dioecious; Male inflorescence spicate pendulous, constant fasciculate in leaf axils, sometimes base of inflorescence elongated arranged into panicles; Male flowers solitary dense, base with 2 ovate bracts; Tepals lanceolate, purple when fresh; 6 stamens, inserted at base of perianth, filaments subequal with anthers; Female inflorescence similar to male inflorescence, often 2 to several fascicular axils, 20~50 cm long, 6 staminodes, 1/4 the length of perianth. Capsule reflexed pendulous, triangular oblong, 1.5~3 cm long, 0.5~1.5 cm wide, round at both ends, yellowish when ripe, with dense purple spots on the surface. Seeds dark brown, oblate, usually twinned at the apex of the axis of each cell, seeds color chestnut brown, extending toward the seeds, oblong. Its flowering period is from July to October, fruiting from August to November.
Ecological environment: The plant grows on the edge of a valley, gully, or edge of a mixed wood forest of altitude below 2,000 meters above sea level. Resource distribution: The plant mainly distributes in the east, central and southern areas, southwest, northwest, Taiwan, and other areas of China.
Growth characteristics: The plant grows in a valley, along a river, road, or on the edge of a forest. It prefers a warm and humid climate, resistant to shade. It is advisable to cultivate in sandy loam with sufficient sunlight, deep soil layer, loose and fertile soil and good drainage.
Characters of herbs: mostly cross-sectional thick slices, round or nearly round, 2.5~7 cm in diameter and 0.5~1.5 cm in thickness. Surface brown-black, wrinkled, have many white, dot shape protuberant fibrous root mark, or have the fine root that curve remains, cork flaking easily; Section yellowish-white to yellowish-brown, flat or uneven. The quality is firm and brittle, easy to break, section granule shape, and scattered have orange-yellow hemp point. Slight breath, bitter taste. The herb with big piece, skin brown-black, cross-section yellow-white is preferred.
Pharmacological actions: It can directly inhibit the myocardium, has an inhibitory effect on the isolated intestine, and presents the effect of ankylotic contraction and rhythmic contraction on the uterus. The decoction can inhibit staphylococcus aureus and many kinds of dermatophytes. It has an inhibitory effect on tumor cells.
Medicinal efficacy: Clear heat and detoxify, cool serum and clear galls, indicated for sore throat, carbuncle and ulcer, snake bite, goitre(goiter, thyroncus), vomiting blood, hemoptysis(spit blood).
Administration of Airpotato Yam Rhizome(Huánɡ Yào Zǐ):
Administration Guide of Airpotato Yam Rhizome(Huánɡ Yào Zǐ)
Internally:3~9 grams(CP), Internally: water decoction, 1.5~3 qian(about 4.5~9 grams), Externally: mashed and apply stick, or grinded into a fine powder and apply stick(DCTM), or Internally: water decoction, 3~9 grams, or infused in wine, or grinded into a fine powder, 1~2 grams.Externally: proper amount, mashed the fresh herb, or grinded into a fine powder and apply stick, or extract juice and smear(CHMM).
1.Introduction of Huang Yao Zi:Airpotato Yam Rhizome or Rhizoma Dioscoreae Bulbiferae.
2.TCM Books:DCTM(Dictionary of the Chinese Traditional Medicine),CHMM(Chinese Herbal Materia Medica).