Introduction of Zi Wan:Tartarian Aster Root or Radix Asteris.
✵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 cold-phlegm.
Introduction: Expectorants,herbs for resolving cold-phlegm: an agent or substance herbs warm in property, used in treating disorders of cold-phlegm or phlegm-dampness.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species, are recorded in this category. These expectorants, herbs for resolving cold-phlegm are briefly introduced separately:
Radix Asteris(Tartarian Aster Root).
Pin Yin Name: Zǐ Wǎn.
English Name: Tartarian Aster Root.
Latin Name: Radix Asteris.
Property and flavor: warm, bitter.
Brief introduction: The herb Radix Asteris is the dried root and rhizome of Aster tataricus L.f.(family Compositae), used as an expectorant and antitussive for a cough with profuse phlegm and also for phthisical cough. The herb is commonly known as Radix Asteris, Tartarian Aster Root, Zǐ Wǎn.
Botanical source: The herb Radix Asteris(Tartarian Aster Root) is the dried root and rhizome of Aster tataricus L.f., they are plants of the Aster L. genus, the Compositae family of the Campanulales order.
Common official herbal classics and other famous herbal classics defined the herb Radix Asteris(Tartarian Aster Root) as the dried root and rhizome of:(1). Aster tataricus L.f. This commonly used species is introduced as:
(1).Aster tataricus L.f.: Botanical description: Perennial herbs, 40~150 cm tall. Stems erect, often undivided, stout, sparsely hispid. The rhizome is short, must give birth to most fibrous roots. Basal leaves withered, deciduous, oblong-spatulate or ellipsoid, 20~50 cm long, 3~13 cm wide, base descending; Cauline leaves alternate, sessile; Leaf blade oblong or lanceolate, 18~35 cm long, base descending; Cauline leaves alternate, sessile; Leaf blade elliptic or lanceolate, 18~35 cm long, 5~10 cm wide, midrib stout, with 6-10 pairs of pinnate lateral veins. Inflorescences mostly, 2.5~4.5 cm in diameter, arranged in a corymbose pattern. Involucral bracts hemispherical, 10~25 mm wide, involucral bracts 3 layers, outer layer gradually shorter, all or upper grassy, apex apical or rounded, margin broadly membranous, purplish-red; Inflorescence margin ligulate, ca. 20, blue-purple, ligulate apex 3-dentate, style, stigma 2-bifurcated; Central have much tube shape flower, bisexual, yellow, apex 5 tooth crack; 5 stamens; Stigma bifurcated. Achene obovate-oblong, flat, purple-brown, 2.5~3 mm long, with 1 or at least 3 veins on each side, upper with short pubescent hairs, crown hair stained white or reddish. Its flowering period is from July to September, fruiting from September to October.
Ecological environment: The plant grows in lowland wetland, hilltop, and lowland grassland and marsh. The plant mainly distributes in the north area, south of Gansu and north of Anhui, west of Henan in China.
Growth characteristics: The plant grows in wetland, hilltop, and low mountain grassland and marsh. It prefers a warm and humid climate, resistant to cold and waterlogging. The root can pass safely at a temperature -20℃ in winter. It is suitable to cultivate in sandy loam with deep soil layer, loose and fertile soil, rich in humus and good drainage, but not coarse soil. Avoid continuous cropping.
Characters of herbs: the rhizome is a regular block, 2~5 cm long, 1~3 cm in diameter; Surface is purplish-red or grayish red, apex colonized stem base and petiole colonized, middle-lower clustered most fine roots; Hard, flat section, oily. Roots numerous, slender, 6~15 cm long, 1~3 mm in diameter, mostly braided; Surface is purplish-red or grayish red, with longitudinal wrinkles; Quality is more pliable, easy to break, section light brown, the edge is a circle of purplish red, there is a small wood heart. Slight fragrance, sweet and bitter taste. The herb with long root, color purplish red, quality flexibility is better.
Pharmacological actions: ①.Expectorant and cough suppressant: anesthetized rabbit orally administered with water decoction, have a significant expectorant effect, the effect lasting more than 4 hours; ②.Antibacterial effect: In vitro test, the decoction had a certain inhibitory effect on Escherichia coli, Dysentery bacillus, Bacillus proteus, Bacillus typhi, Bacterium paratyphosum, Pseudomonas aeruginosa, and Spirillum cholerae.
Medicinal efficacy: Moistening lung and downbear Qi, eliminating phlegm and relieving cough, indicated for the treatment of asthmatic cough with much phlegm, new cough and chronic cough, over-strained cough and hemoptysis.
Administration of Radix Asteris(Zǐ Wǎn):
Administration Guide of Radix Asteris(Zǐ Wǎn)
Internally:5~9 grams(CP), or 0.5~3 qian(about 1.5~9 grams,DCTM), or 4.5~10 grams(CHMM), water decoction; grinded to fine powder and prepared to pill, powder.
1.Introduction of Zi Wan:Tartarian Aster Root or Radix Asteris.
2.TCM Books:DCTM(Dictionary of the Chinese Traditional Medicine),CHMM(Chinese Herbal Materia Medica).