Imperata cylindrica var. major

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Other Names:

Historical Use of Imperata cylindrica var. major

Imperata cylindrica var. major in Traditional Chinese Medicine


Maogen é¸ù Xianmaogen ÏÊé¸ù Chinese Name (pinyin): Baimaogen

Chinese Name  :

Common Name  :Imperata Rhizome

Specific Name  : Rhizoma imperatae

Scientific Name:
Collection  : The drug is collected in spring and autumn, wash clean dried in the sun, removed from fibrous roots and membranous leaf sheath and tied up in small bundle.

Description  : Long cylindrical, 30 - 60 cm long, 2 - 4 mm in diameter. Externally yellowish white or yellowish, slightly lustrous, longitudinally wrinkled, nodes distinct and slightly raised, internodes varying in length usually 1.5 - 3 cm long. Texture light, somewhat fragile, fracture white in bark, mostly with cracks arranged radially, stele yellowish, easily stripe from cortex. Odourless, taste slightly sweetish.

Identification  : 1.Heat and reflux 5 g of the coarse powder with 30 ml of benzene for 1 hour and filter. Evaporate 5 ml of the filtrate to dryness, add 1ml of acetic anhydride to dissolve then add 1 - 2 drops of sulfuric acid, a red color is produced which gradually turns to violet red bluish violet and dirty green color at last.2.Boil 1 g of the coarse powder with 10 ml of water for 5 - 10 minutes, filter and concentrate the filtrate to 1 ml, add 1 ml of alkaline cupric tartarate TS, heat on a water bath, a brownish red precipitate is produced.Total ash: Not more than 5.0% (Appendix 1X K)

Processing  : Wash clean, soften briefly, cut into sections, dry and sift.Rhizoma Imperatae (carbonized): Stir fry the sections as describe under the method of carbonizing by stir frying (Appendix ll D) until it becomes brown.

Action  : To arrest bleeding by reducing heat in blood, to remove heat, and to cause diuresis.

Indication  : spiting of blood, epistaxis and hematuria due to heat in the blood; febrile diseases with thirst; jaundice; urinary infection with difficult painful urination; edema in acute nephritis

Precautions  :

Dosage  : 9 to 30 g; 30 to 60 g of the fresh rhizome.

Storage  : Preserve in a dry place.

Synonymns for Imperata cylindrica var. major

Patent Medicines and Medicines with Multiple Ingredients that include Imperata cylindrica var. major

Pharmaceutical Information

Chemical Constituents

Evidence or the Use of Imperata cylindrica var. major in the Treatment of Epilepesy

Basic Science

Animal Studies

Cohort, Case-Control and Non-Randomized Trials

Randomized Controlled Trials


1st Five Results: pubmed search

Swarnali Dey, Rita Kundu, Geetha Gopal, Amitava Mukherjee, Anish Nag, Subhabrata Paul
Enhancement of nitrogen assimilation and photosynthetic efficiency by novel iron pulsing technique in Oryza sativa L. var Pankaj.
Plant Physiol. Biochem.: 2019, 144;207-221
[PubMed:31586721] [] [DOI] (I p)

Keiichiro Matsukura, Sachiyo Sanada-Morimura, Tomohisa Fujii, Masaya Matsumura
Plant Dis.: 2019, 103(6);1244-1248
[PubMed:30964417] [] [DOI] (P p)

Meritxell Navarro-Reig, Romà Tauler, Guillermo Iriondo-Frias, Joaquim Jaumot
Untargeted lipidomic evaluation of hydric and heat stresses on rice growth.
J. Chromatogr. B Analyt. Technol. Biomed. Life Sci.: 2019, 1104;148-156
[PubMed:30471516] [] [DOI] (I p)

Billie A Gould, Juan Diego Palacio-Mejia, Jerry Jenkins, Sujan Mamidi, Kerrie Barry, Jeremy Schmutz, Thomas E Juenger, David B Lowry
Population genomics and climate adaptation of a C4 perennial grass, Panicum hallii (Poaceae).
BMC Genomics: 2018, 19(1);792
[PubMed:30384830] [] [DOI] (I e)

Yuan Gao, Xukun Pan, Xutao Sun, Jun Li, Liyao Dong
Is the protection of photosynthesis related to the mechanism of quinclorac resistance in Echinochloa crus-galli var. zelayensis?
Gene: 2019, 683;133-148
[PubMed:30316919] [] [DOI] (I p)



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