Herbs Dictionary

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Radix Asteris (Ziwan)

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Naming
Zi Wan (Radix Asteris)-Shen Nong Ben Cao Jing (Shen Nong’s Herbal)

Origin
The dry root and Rhizoma of perennial herbaceous plant Aster tataricus L. f. of family Compositae.

Location
Hebei, Anhui and Heilongjiang provinces and so on in China.

Harvest
Collected in spring and autumn.

The actual smell and taste
Lightly fragrant smell, sweet and slightly bitter taste.

Best quality
Long, violet, soft and elastic, without stem and sprout.

Processing
Dried in the sun or stir-baked with honey.

Property
Bitter, pungent, sweet, slightly warm; lung meridian entered.

Actions
Moisten lung to resolve phlegm and stop cough.

Indications
Cough with phlegm

radix asteris (ziwan)

It is often used after stir-baked with honey. Being sweet in flavor, it is moistening. Being bitter in flavor, it is purging. It is pungent and warm without dryness. So it is good at directing qi downward also moistening lung to stop cough and resolving phlegm, it is combined with herbs to treat cough with phlegm caused by external contraction or internal injury, or cold and heat, or deficiency and excess syndromes. For cough due to wind-cold with symptoms of persistent cough and dryness phlegm, it is often combined with wind-cold-dispersing herbs and lung-ventilating to resolve phlegm and stop cough herbs, such as Herba Schizonepetae (Jingjie), Radix Platycodi (Jiegeng), and so on. For cough due to lung heat with symptoms of profuse yellow thick phlegm, it is often combined with heat-clearing and phlegm-resolving herbs, such as Radix Scutellariae (Huangqin), and Chuan Bei Mu and so on. For cough due to lung yin deficiency with symptoms of bloody phlegm, it is often combined with Colla Corii Asini (Ejiao), Chuan Bei Mu, Rhizoma Anemarrhenae (Zhimu), and so on, in Wang Hai Zang Zi Wan Tang.

Dosage and Administrations
Decoct 3~10 g. It is mostly stir-baked with honey.

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