Bai Qian / Cynanchum Stauntonii last update 06-2014
DESCRIPTION: Rhizome of Cynanchum stauntonii are slender and cylindrical, branched and somewhat curved. 4-15 cm long, 1.5-4 mm in diameter, externally yellowish-white or yellowish-brown, internodes 1.5-4.5 cm long; Texture fragile, fracture hollowed. Numerous fine curved root and rootlets fascicled at nodes, up to 10 cm long, less than 1 mm in diameter, many branches and appearing hairy or fibrous, usually coiled together in a mass. Mild odor with a sweet taste.
Rhizome of Cynanchum glaucescens is an alternate strand. Relatively shorter and smaller, or slightly lumpy; externally grayish-green or grayish-yellow, internodes 1-2 cm long; Texture relatively hard. Roots slightly curved, about 1 mm in diameter, less branched.
Taste & Property: Pungent, bitter, slightly warm. Meridians: Lung.
ACTION: To eliminate phlegm and relieve cough.
INDICATIONS: Cough with copious expectoration and dyspnea.
REFERENTIAL ADVICE: Promoting the lung's dispersing function, sending down adverse flow of Qi, dispelling phlegm and relieving cough. This herb is a main drug to treat cough because it can regulate the flow of Qi, thus eliminating phlegm and relieving cough. It is effective in treating cough with profuse sputum due to obstruction of the lung-Qi, stuffy chest, shortness of breath, etc.. This herb can be used in combination with Herba Ephedrae, Flos Farfarae, Semen Armeniacae Amarum, Radix Glycyrrhizae, etc. In treating cough and asthma with yellow and sticky sputum difficult to be expectorated due to lung-heat, the herb can be used in combination with Cortex Mori Radicis, Radix Rehmanniae, Cortex Lycii Radicis, etc. In treating cough due to exogenous wind-cold, the herb is often used in combination with Herba Schizonepetae, Radix Platycodi, Pericarpium Citri Reticulatae, etc.
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