Introduction of Zi Wan:Tartarian Aster Root or Radix Asteris.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Tartarian Aster Root, its English name, Latin name, property and flavor, its botanical source one plant species, ①.Aster tataricus L.f., with a detailed introduction to the botanical features of this plant species, the growth characteristics, and ecological environment of this plant species, the features of the herb Tartarian Aster Root its pharmacological actions, medicinal efficacy, and administration guide.

Radix Asteris(Tartarian Aster Root).

Aster tataricus:flowering plant. 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.

 Aster tataricus L.f.:flowers 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.

 Aster tataricus L.f.:flowers 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.

 Aster tataricus L.f.:drawing of plant and herb 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.

 Tartarian Aster Root:herb photo Characters of herbs: The rhizome is an irregular block, 2~5 cm long and 1~3 cm in diameter; The surface is purple-red or gray-red, with different sizes. There are residues of stems and leaves at the top, and most fine roots are clustered in the middle and lower parts. The texture of the herb is hard, the fracture surface is flat, oily. Many roots, thin and long, 6~15 cm long and 1~3 mm in diameter, mostly braided; The surface is purplish red or grayish red with longitudinal wrinkles; the texture of the herb is pliable and tough, easy to break, the fracture surface is light brown, purplish red around the edge, and there is a small wooden core in the middle. The herb is slightly fragrant, tastes sweet and slightly bitter. The herb which has long roots, purple-red color and the texture is pliable and tough is better.

 Pharmacological actions: ①.Expectorant and cough suppressant; 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): 
Reference: Administration Guide of Radix Asteris(Zǐ Wǎn)
TCM Books: ①.Internally:5~9 grams;②.0.5~3 qian(about 1.5~9 grams);③.4.5~10 grams, water decoction; grinded to fine powder and prepared to pill, powder.

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.
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