Crude drug sample data base

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Crude drug name

Market name茅根
Formal name茅根
Japanese nameぼうこん, Bōkon
Vernacular nameMaogen
Latin nameImperatae Rhizoma (JP), (CP)
English nameImperata Rhizome (JP), Lalang Grass Rhizome (CP)
Other names白茅根 (Baimaogen)
Original plant nameImperata cylindrica P. Beauvios var. major (Ness) C. E. Hubb.
Family nameGramineae
Used partClassificationPlant origin
Sub classification rhizome
TMPW No.438

Scientific information data base

Common name茅根, Maogen, Imperatae Rhizoma (JP18, CP2020), Imperata Rhizome (JP18), Lalang Grass Rhizome (CP2020)
Synonyms白茅根 (Baimaogen)
crude drug image
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Original plant nameImperata cylindrica Beauvois1, Imperata cylindrica P. Beauvios var. koenigii Durand et Schinz, Imperata cylindrica var. major C.E. Hubb., (Chigaya1)
original plant image
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Family nameGramineae
Used partrhizome
Quality for selectionGood Maogen is thick, long and light in color (yellowish-white). (TN)
Official compendiumJP XVIII, CP (2020 ed.)
Clinical applicationAs an antiinflammatory diuretic, antifebrile, hemostatic, for clearing blood, maogen is applied for heat disease, hematemesis, epistaxis, hematuria, edema, jaundice, oliguria, thirst, asthma and nausea.
Medical systemTraditional Chinese medicine
Drug effect in
traditional medicine
Beneficial effect[Property and Flavor] Cold; sweet.
[Meridian Tropism] Lung; stomach and bladder meridians.
[Actions] To cool the blood, stanch bleeding, clear heat, and promote urination.
[Indications] Hematemesis, epistaxis and hematuria caused by blood heat, vexation and thirst caused by heat disease, dampness-heat jaundice, edema, small quantity of urination, and heat strangury with slow pain.
Chemical constituentOther aliphatic and related compounds
Citric acid, Malic acid

D-Fructose, D-Glucose, D-Xylose


Simiarenol, Cylindrin, Arundoin, Fernenol, Isoarborinol


Chemical structure

Pharmacological effectDiuresis (water extract).
DNA sequenceAF345653, AF092512, AF190764
Classical reference
(Chinese Herbal Classic "Zhenglei bencao")
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DiseaseHematemesis, Nasal hemorrhage, Hematuria, Thirst, Vomitting, Nausea, Hiccup, Measles, High fever, Cough, Jaundice, Acute nephritis, Urodynia, Dysuria
Formulationrarely used in formula
ReferencesJP18: The 18th edition of the Japanese Pharmacopoeia.
CP2020: Pharmacopoeia of the People's Republic of China 2020 edi.
C1) The Encyclopedia of Wakan-Yaku with Color Pictures Vol. I, pp 98-99.
Last renewal date2021/09/27