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Coix Seed
Coix Seed
Market name:薏苡仁
Photo location:Museum of Materia Medica, Inst. of Nat. Med.
TMPW No.:10087
Coix lacryma-jobi Linné var. mayuen Stapf
Plant name:Coix lacryma-jobi Linné var. mayuen Stapf
Photo location:Hokkaido, Japan
Photo date:1982
Photographer:K. Komatsu

Latin name Coicis Semen
Botanical source: Family name Gramineae
Botanical source: Plant name Coix lacryma-jobi var. ma-yuen Stapf (IPNI:60461956-2)
Part used Dried ripe seed
Empirical criteria for quality selection The bigger and whitisher grain without insect damage is considered as good quality.
Constituents Lipids:
Palmitic acid, Myristic acid, Linolic acid, Glycerides of cis-8-octadecenoic acid, etc

Other aliphatic and related compounds:


β-Sitosterol, Campesterol, Stigmasterol

Amino acids:
Glutamic acid, Leucine, Tyrosine, Valine

Pharmacological effects Respiratoy action (low dose; accelerated, high dose; palsy), pulmonary vasodilation.
Indications As diuretic, antiinflammation, painkiller and draining pus, it is applied to treat edema, rheumatoid, neuritis and suppurate. In folk use, removement wart and tonic.
Diseases Edema, Oliguria, Fever, Feeling of heavy and dull, Feeling of pressure in the chest, Diarrhea, Swelling and pain of joint, Numbness, Lung suppurations, Appendicitis, Muddy and watery stool, Leukorrhea
Formulas keishibukuryoganryokayokuinin , jinryobyakujutsusan , choyoto , toryuto , makyoyokukanto , yokuininto , yokuibushihaishosan
Meridian tropism Spleen, Stomach, Lung
Property Slightly cold
Flavor Sweet, Bland
Classification in "Shen-non Ben-cao Jing" Superior
TCM: Classification Diuretics with removing dampness
TCM: Medicinal effects To invigorate the spleen function and promote diuresis, to alleviate arthritis, to arrest diarrhea, to remove heat and facilitate the drainage of pus.
Remarks Listed in the Japanese Pharmacopoeia 18th ed.
References TN: T. Namba & Y. Tsuda ed., Outline of Pharmacognosy, a Textbook, 3rd ed., Nankodo Co., Ltd., Tokyo, 1998.
DNA sequences of medicinal plants
Gene Region
Nuclear Chloroplast Mitochondria
Botanical source: Plant name 5Ss 18S ITS1 5.8S ITS2 26S others trnH-psbA matK trnK trnK-rps16 trnT-L trnL trnL-F rbcL rpoC1 ndhF others
Coix lacryma-jobi var. ma-yuen Stapf (IPNI:60461956-2)


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Section of Pharmacognosy,
Division of Medicinal Resources,
Department of Research and Development,
Institute of Natural Medicine,
University of Toyama
2630 Sugitani, Toyama 930-0194 Japan
TEL: +81-76-434-7601
FAX: +81-76-434-5064