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Pyrrosia [leaf]
石苇 〔石苇〕shí wěi
Latin pharmacognostic name: Pyrrosiae Folium
Alternate Chinese names: 石皮 shí pí; 石兰 shí lán; 虹霓剑草 hóng ní jiàn cǎo; 石苇 shí wěi
Kingdom: Plant
Origin in PRC Pharmacopoeia: Pyrrosia lingua (Thunb.) Farw.; Pyrrosia sheareri (Bak.) Ching; Pyrrosia petiolosa (Christ) Ching. (PRC Pharmacopoeia)
Origin (other sources): Pyrrosia lingua (Thunb.) Farw.*; Pyrrosia sheareri (Bak.) Ching*; Pyrrosia petiolosa (Christ) Ching*; Pyrrosia drakeana (Franch.) Ching; Pyrrosia davidii (Gies.) Ching; Pyrrosia gralla (Gies.) Ching
Use: Medicinal
Category:
Properties: Bitter, sweet; slightly cold.
Channel entry: Lung and bladder channels.
Indications:
- Disinhibits urine and frees strangury: Damp-heat strangury patterns, dribbling urinary block.
- Clears the lung and relieves cough: Patterns of
phlegm-heat cough and panting. - Cools the blood and stanches bleeding: Frenetic movement of blood from blood heat with vomiting of blood (blood ejection), nosebleed, or flooding and spotting.
Dosage & Method: A decocted dose of 5‒10g is typical, although 30‒60g may be used.
Warnings: Contraindicated in yīn vacuity and in the absence of damp-heat.
Quality: Large thick leaves that have reddish backs and speckles are best.
Product Area: Húběi, Sìchuān, Jiāngxī.
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