Introduction of Yu Mi Xu:Corn Stigma or Stigma Maydis.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Corn Stigma, its English name, Latin name, property and flavor, its botanical source one plant species, ①.Zea mays L., with a detailed introduction to the botanical features of this plant species, the growth characteristics, and ecological environment of this plant species, the features of the herb Corn Stigma, its pharmacological actions, medicinal efficacy, and administration guide.

Stigma Maydis(Corn Stigma).

light brownish dried herbs of Stigma Maydis Pin Yin Name: Yù Mǐ Xū.
 English Name: Corn Stigma.
 Latin Name: Stigma Maydis.
 Property and flavor: neutral in nature, sweet, tasteless.

 Brief introduction: The herb Stigma Maydis is the dried styles and stigmata of Zea mays L., used (1).to induce diuresis for treating edema, (2).to promote bile discharge in cases of jaundice, and (3).to reduce high blood pressure in cases of hypertension. The herb is commonly known as Stigma Maydis, Corn Stigma, Yù Mǐ Xū.

 Botanical source: The herb Stigma Maydis (Corn Stigma) is the dried styles and stigmata of Zea mays L., it is a plant of the Zea Genus, the Poaceae family (Gramineae, grass family) of the Poales order. This commonly used species is introduced:

(1).Zea mays L.

 plant of Zea mays L grow with corn and stigma Botanical description: Zea mays L is a plant of the Poaceae family (Gramineae, grass family) and Zea genus, an annual cultivated tall plant, stem and rod are stout, and upright, and the plant grows up to 50~100 cm tall, or up to 1~4 meters tall, normally unbranched, basal node often has aerial roots. The main root is hypertrophic, ligneous (woody), often branched, and off-white. Stems are upright, many-branched at the upper part, has fine ribs, and white pilose.

 The leaf is pinnate and has 13~27 lobules (leaflets), 5~10 cm long; the petiole is 0.5~1 cm; stipules are free, ovate, lanceolate or linear-lanceolate, 4~10 mm long, the lower part is white, soft and glabrous; Leaf blades are broad and big, linear-lanceolate, the margin has undulated corrugations (undulated folding), has strong middle veins; lobules are elliptic or oblong-ovate, 7~30 mm long, 3~12 mm wide, the apex is obtuse or slightly concave, small pointed or inconspicuous, the base is rounded, the upper surface is green, proximal glabrous, the under surface has white pilose.

 Male panicles are slightly dense, have 10~20 flowers, and grow on the top of the rod; branches of the male inflorescence are prismatic, each node has 2 male spikes, one spike is sessile, another spike has short stipitate; each male spike contains 2 small florets (flowerets); glumes (peristachyum) are membraneous, the apex is pointed; lower palea (inferior palea) and palea are both transparent membraneous; cylindrical female inflorescences grow out from leaf axils, the out calyx of female inflorescence has many sheathed bracts, female spikelets densely arrange in lines on stout spike stalk, glumes (peristachyum) are broad, apex is rounded or slightly emarginated, lower palea (inferior palea) is membraneous and transparent. Its flowering and fruiting period is from July to September.

 plants of Zea mays L with corn cob growing on stem Ecological environment: Zea mays L is cultivated widely nowadays, it was native to the South America continent, and might was first domesticated by indigenous peoples in Southern Mexico about 10,000 years ago. It is now cultivated in many areas of the global village.

 Growth characteristics: The plant Zea mays prefers a high temperature, needs more water, and loose and fertile soil is suitable for its growth, it has been cultivated widely as a crop.

 reddish Corn Stigma are piled together Characters of herbs: The herb is often clustered into loose clusters, the styles are linear or fibrous, the intact style is up to 30 mm long, about 0.5 mm in diameter, pea green (pale green), yellowish green to red-brown, lustrous, slightly transparent, stigma is 2-lobed (bifurcated), diverge, up to 3 mm long, the texture of the herb is soft. The herb of a better grade is soft and lustrous.

 Pharmacological actions: ①.obvious diuretic effect, can inhibit protein excretion; ②.lowering blood pressure; ③.promote bile secretion and excretion, reduce bile viscosity and bilirubin content; ④.lower blood sugar, increases prothrombin in the blood and accelerates blood coagulation, etc.

 Medicinal efficacy: Prompt diuresis, prompt diuresis and detumescence (reduce swelling), eliminate heat, calm the liver, cholagogic effect. It is indicated for the treatment of nephritis, edema, dripping discharge of urine, beriberi, jaundice, hepatitis, hepatitis jaundice, hypertension, cholecystitis, gallstones, diabetes mellitus, hematemesis (vomit blood), epistaxis (nose bleeding or bleeding from five aperture or subcutaneous tissue), acute and chronic sinusitis, milk obstruction (alactation, no milk), acute mastitis, etc.

 Administration of Stigma Maydis (Yù Mǐ Xū): 
Reference: Administration Guide of Stigma Maydis (Yù Mǐ Xū)
TCM Books: ①.Internally: 3~9 grams;②.Internally: water decoction, 1~2 liang (about 30~60 grams),or charred the herb with its property retained, prepare to finely ground herb powder.Externally:burn smoke and inhale it; ③.Internally: water decoction, 15~30 grams, big dosage could be 60~90 grams,or charred the herb with its property retained,prepare to finely ground herb powder.Externally:burn smoke and inhale it.
 Precautions and Adverse Reactions:the silk should be peeled in cooking, should Not be used if not take as herbs.




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  • 1.Introduction of Yu Mi Xu:Corn Stigma or Stigma Maydis.

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