FlowersHeat-clearingEriocauli Flos

Gu Jing Cao (Buerger Pipewort Head)

Q: What is the composition and traditional use of Gu Jing Cao?

Its pharmacopoeial name is Gu Jing Cao, Latin name Eriocaulon buergerianum. It is acrid and sweet, neutral, enters the Liver and Lung channels, and is used to disperse wind-heat, brighten the eyes, and remove nebula for wind-heat red eyes, swelling, pain, photophobia, eye nebula, and wind-heat headache.

Q: How do you choose raw versus prepared? Can Mu Zei replace it?

Gu Jing Cao is used raw. Mu Zei leans more toward removing nebula and cannot replace it by equal weight. Commercial products follow regulated processing, so do not self-modify.

Q: What is the usual dosage? Can it be drunk daily as an eye-brightening tea?

The usual decoction dose is 5–10 g, and a practitioner should determine the exact dose. It is not meant to be drunk as a daily four-season tea; yin deficiency and blood depletion may be worsened, and red eyes should be assessed by a practitioner for a short course rather than self-treated.

Q: What are the contraindications? Can it be used in pregnancy?

It is not suitable for eye disorders from yin deficiency and blood depletion. Pregnancy requires practitioner assessment. Stop if eye swelling or fatigue appears, and sudden vision loss or severe eye pain need immediate medical care.

Q: Can Gu Jing Cao disperse wind-heat, brighten the eyes and remove nebula?

It can help with wind-heat red eyes with swelling, pain and photophobia, eye nebula, and wind-heat headache. It does disperse wind-heat, brighten the eyes, and remove nebula, but it is not a specific cure for every red eye or every headache.

Q: How do you choose among Gu Jing Cao, Mu Zei, Ju Hua, Jue Ming Zi and Chan Tui?

Gu Jing Cao is preferred for wind-heat red eyes and nebula; Mu Zei for cloud nebula; Ju Hua for wind-heat; Jue Ming Zi for Liver heat; and Chan Tui for wind-heat. They should be chosen after pattern differentiation, and yin deficiency and blood depletion forbid large Gu Jing Cao.

A practical guide to Gu Jing Cao: what it is, how Traditional Chinese Medicine uses it, the classical formulas it appears in, and who should be careful with it.

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Last reviewed Oct 29, 2026

Quick Facts

Latin Name	Eriocauli Flos
Chinese Name & Pinyin	谷精草 · Gu Jing Cao
Medicinal Part	Flowers
The item	Gu Jing Cao is the dried capitulum with its flower stalk, or the whole plant, of Eriocaulon buergerianum. Mu Zei is not this herb. It usually goes into light decoctions and teas.
Nature and channels	Pungent, sweet, bland, neutral. Enters the Liver, Lung, and Stomach. It scatters wind-heat, brightens the eyes, and dispels eye films.
Pharmacopoeia line	Scatters wind-heat, brightens the eyes, and dispels eye films. Used for wind-heat headache, red swollen painful eyes, eye films covering the pupil, and eye discomfort.
Pattern cues	Early wind-heat cold. Red, swollen, painful eyes. Eye films. Dry, tired eyes after overuse.
In this article	Gu Jing Cao versus Mu Zei. Scattering head-face wind-heat versus soothing liver heat. Why the dose stays small. Why spleen-stomach cold is a caution. Who should skip it.

What Is Gu Jing Cao?

Gu Jing Cao (谷精草; Gǔ Jīng Cǎo; Latin: Flos Eriocauli; English: pipewort flower head) in the current pharmacopoeia is the dried capitulum with its flower stalk, or the whole plant, of Eriocaulon buergerianum of the pipewort family, collected in autumn when the heads are mature but not yet split open, then sun-dried. It is pungent, sweet, and bland, neutral in nature, enters the Liver, Lung, and Stomach channels, and its core actions are to scatter wind-heat, and to brighten the eyes and dispel eye films. It usually goes into light decoctions and gentle teas. The usual amount is 5–10 g. It is wrapped in gauze and gently simmered for about 10 minutes, with no special early or late adding. It is also steeped as a tea in smaller servings.

It is not Mu Zei. Both scatter wind-heat and brighten the eyes, but Mu Zei is slightly warm and leans more on soothing the liver channel and clearing eye films, while Gu Jing Cao is neutral and lighter, better at scattering wind-heat off the head and face. Spleen-stomach deficiency-cold with frequent loose stools is a poor match. Deficiency-type eye discomfort, without wind-heat signs, is also a poor match. Use caution in pregnancy and during breastfeeding.

It is used most often for three patterns:

Early wind-heat cold, headache, red eyes, sore throat
Red, swollen, painful eyes, eye films covering the pupil
Dry, tired eyes and blurred vision after overuse

Pungent, sweet, bland, and neutral, it is not a daily “eye tea” to keep increasing. In a cold spleen and stomach, with no wind-heat, it scatters outward for nothing and weakens qi.

When wind-heat rises to the head and face, or liver heat stirs the eyes, headache, red eyes, and eye films are common. Gu Jing Cao is pungent, sweet, bland, and neutral. It rises lightly and scatters upward, brightening the eyes as it goes, which is why it appears in Gu Jing San (Pipewort Powder)–type formulas for wind-heat eye disease, and supports Gu Jing Cao Tang (Pipewort Decoction)–type formulas for liver heat with wind-heat. It scatters more than it holds. A cold, loose stomach with no heat gets worse if more is added.

Gu Jing Cao is not a catch-all eye or headache herb. In spleen-stomach deficiency-cold with loose stools, or in deficiency-type eye discomfort, using it alone is a poor match. Raw or dried, and whether it belongs in a formula, should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.

Gu Jing Cao: Materia Medica Profile

Identification & Quality Standard

Eriocauli Flos

Botanical Origin

The dried flower head and accompanying stem of Eriocaulon buergerianum Koern.(Eriocaulaceae)

Production Regions

Primarily produced in the Chinese provinces of Anhui, Jiangxi, Jiangsu, Zhejiang.

Quality Requirements

Superior medicinal material has large and tight ‘pearls’, grayish-white color, short yellowish-green stem, no roots, leaves or foreign matter.

Macroscopic Features

Flower head is sub-spherical, 4~5mm diameter; base has scale-like pale yellow bracts, densely arranged in a plate-like shape; 30~40 small flowers, grayish-white, densely arranged, externally covered white thin powder; after hand-crushing, numerous black small granules and grayish-green small seeds can be seen. Below the flower head, one thin long stem is connected, 15~18cm long, lustrous. Soft texture, difficult to break. faint odor; tasteless, becomes a lump when chewed.

Main Regions and Quality Identification

Traditional materia medica and industry experience value the Jiangsu, Zhejiang, and Anhui producing regions of the middle-lower Yangtze — considering the material supple and the capitula plump with a clear fragrance; but actual quality also depends on variety, harvest time, processing, and storage. In appearance, good-quality Gu Jing Cao capitula are hemispherical, 4–5 mm in diameter, gray-white or pale yellowish-green with luster, with slender, gray-green, soft flower stalks; the odor is faint and the taste slightly astringent. The common look-alikes are capitula of the same-genus plants or other similar little grasses — their capitula are smaller, more brittle, and fainter in odor; note the difference.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Acrid, Sweet; NeutralLiverLung

1. Records in Classic Materia Medica

Shen Nong Ben Cao Jing: Gu Jing Cao is not separately collected there.
Ming Yi Bie Lu: lists it as a middle-grade herb — "treats throat bi, wind pain of the teeth, and all kinds of sores and scabies."
Xin Xiu Ben Cao: adds that it "brightens the eyes and removes films."
Ben Cao Gang Mu: states clearly that it "raises the yang and moves upward, so it treats head-wind pain and blindness with eye films."
De Pei Ben Cao: notes it "scatters wind-heat and clears the head and eyes" — usable for "wind-heat headache and red eyes with films."
Zhong Hua Ben Cao: summarizes its actions as "scattering wind-heat, brightening the eyes, and removing films."

2. How Views of Its Nature Changed

Different physicians saw it somewhat differently. Some stressed its head-eye clearing-benefiting action, mostly using it for wind-heat symptoms of the eyes and head-face. Others emphasized its clear-scattering nature — holding that it fits only patterns with heat signs, and that people with spleen-stomach cold should use it with caution. Still others pointed out its limited scope — that it cannot be used for the eye discomfort of deficiency patterns — showing it is not a universal herb and must be used by pattern diagnosis.

Core Efficacies & Traditional Applications

Traditional Functions

Disperses wind-heat, brightens the eyes and removes nebula.

1. First Direction: Scattering Wind-Heat

Traditional action: scatter wind-heat — mainly for the head-face symptoms of exterior wind-heat.
Typical signs: the early stage of wind-heat colds — headache, red eyes, and swollen, painful throat; or red, dry eyes from wind-heat rising to attack the head.
Usual combinations: often paired with wind-heat scattering herbs such as Bo He, Ju Hua, and Sang Ye to strengthen the effect.
Who should not self-use: those with spleen-stomach cold and frequent diarrhea — its clear-scattering nature may worsen the deficiency-cold symptoms.

2. Second Direction: Brightening the Eyes and Removing Films

Traditional action: brighten the eyes and remove films — mainly for eye wind-heat or mild heat-excess patterns.
Typical signs: the red, swollen, painful eyes of wind-heat, films covering the eyes (a white film inside the eye affecting vision), or the dry eyes and blurred vision of overusing the eyes.
Usual combinations: often paired with eye-brightening herbs such as Chan Tui, Mu Zei, and Jue Ming Zi for a joint effect.
Who should not self-use: pregnant and breastfeeding women — do not self-use; use under a doctor's pattern-based guidance.

3. Classic Pairing: Gu Jing Cao With Ju Hua

The common herb pair is Gu Jing Cao with Ju Hua. Both scatter wind-heat and brighten the eyes: Gu Jing Cao leans toward light-clear scattering, targeting the wind-heat stagnation of the head and face; Ju Hua leans toward clearing the liver and brightening the eyes, targeting the eye discomfort of liver heat. Together they coordinate, strengthening the wind-heat scattering and eye-brightening effect — suiting the red, swollen, painful eyes and headache of wind-heat rising or liver heat. This pairing needs a practitioner's pattern diagnosis — fitting people with clear wind-heat or liver-heat patterns, and not those with spleen-stomach cold.

Modern Research

Modern research offers useful context, but Traditional Chinese Medicine prescribes on whole-pattern diagnosis rather than isolated compounds.

1. Main Chemical Constituents

Detected constituents include flavonoids (such as luteolin and apigenin), triterpenoids, volatile oils, and sterols. In vitro experiments observed that the flavonoid constituents have some antioxidant activity; in animal experiments, some extracts showed an easing effect on an eye-inflammation model. There is not yet sufficient human clinical research to confirm the strength of the specific effect in the human body.

2. Current Research Directions

Current research focuses on the antioxidant and anti-inflammatory activity of Gu Jing Cao. Studies show the flavonoid constituents may have some free-radical scavenging effect; experiments observed that the extract inhibits the release of some inflammatory factors in vitro. But current work is mainly at the basic-experiment stage — more human studies are still needed to verify the effect in real use.

3. Limitations of Current Research

Lab results are not clinical efficacy — observations in basic experiments cannot be directly equated with the effect after a person takes it.
Extracts and monomers are not the same as traditional decoction pieces — the extract concentration and dose used in experiments differ greatly from the slice dose used daily.
Doses and preparation methods vary between studies — making the results hard to judge uniformly.
A single component does not define the whole herb — Gu Jing Cao's action is the joint result of many components; a single component's activity cannot represent the whole herb's action.

Comparing Similar Herbs

1. What They Share

Gu Jing Cao and Mu Zei share:

Both have scattering wind-heat and brightening the eyes as actions.
Both are used for the red, swollen, painful eyes and headache of wind-heat.
Both may appear in eye-discomfort formulas or daily light-regulation scenes.
Both need constitution and dose care — to avoid improper use.

2. The Key Differences: Gu Jing Cao vs. Mu Zei

Nature and flavors: Gu Jing Cao is neutral with pungent-sweet-bland flavors — light and clear, gentle, neither cold nor hot; Mu Zei is slightly warm with sweet-bitter flavors — leaning warm, carrying some warm-scattering quality.
Focus: Gu Jing Cao is better at scattering the wind-heat of the head and face — easing the headache and dry eyes of wind-heat rising, with a good effect on the light-clear stagnation of the head-face; Mu Zei is better at resolving the wind-heat of the liver channel — with a more prominent effect on films covering the eyes (white films inside the eye) from liver heat or wind-heat.
Qi tendency: Gu Jing Cao is rising-floating — focused on scattering the head-face evil upward and outward, moving the qi up and out; Mu Zei is warm-with-neutral scattering — focused on coursing the liver-channel qi, resolving the wind-heat stagnation of the liver channel — leaning more toward regulating the inner qi.
Best fit: Gu Jing Cao suits the early stage of wind-heat colds and mild head-face discomfort — headache, dry eyes, and mild redness without obvious heat-excess; Mu Zei suits obvious eye films with stronger liver heat — obvious eye redness, white films, together with bitter mouth and irritability.
Not suitable: Gu Jing Cao's clear-scattering nature makes it unsuited to those with spleen-stomach cold and frequent diarrhea; Mu Zei's warm-leaning nature makes it unsuited to those with yin-deficiency fire-flourishing (dry mouth and tongue, tidal heat, night sweats) — to avoid worsening the internal heat.
Use scenes: Gu Jing Cao is often a daily light-regulating tea or a herb in mild wind-heat cold formulas — fitting short-term light-to-moderate regulation; Mu Zei is often a paired herb in ophthalmology formulas for the regulation of eye films, rarely taken alone as a daily tea.

3. One-Sentence Summary

Simply put, Gu Jing Cao leans toward light, clear scattering of head-face wind-heat, whereas Mu Zei leans toward resolving liver-channel wind-heat and regulating eye films. Both can be used for the wind-heat eye discomfort, but they are not interchangeable.

Classical Formulas Containing Gu Jing Cao

Gu Jing Wan

固經丸

Formula CategoryAstringent FormulasPrimary PatternYin DeficiencyPrimary FunctionEnrich Yin, clear Heat, stabilize menses, stop bleeding

View Formula Profile Read Complete Guide

Formulas vs. Single Herbs

A formula is the result of many herbs working together — every herb takes a different role, and the lord-minister-assistant-emissary combination coordinates the different actions to cover a fuller picture of the mechanism. A single herb cannot simply replicate a full formula's effect, because a single herb's action is narrow and cannot reach the multi-herb synergy of a formula. The formula's doses and combinations are holistic — different doses change the formula's direction; casually adjusting doses or herbs may break the overall effect. Don't build your own formula from online articles — web information cannot accurately reflect your specific pattern, and blind formula-building may bring risk. The common misunderstanding: that because a herb works inside a formula, taking it alone will work the same way — a formula's effect is the synergy of many herbs, and a single herb's action cannot replace the formula's overall action.

Diet & Daily Home Use

1. Home Tea and Porridge

Tea — Gu Jing Cao Ju Hua Cha: Gu Jing Cao 3 g, Ju Hua 2 g, Gou Qi 2 g. Put all the ingredients in a cup, steep in boiling water, cover 5 minutes, and drink. Suited to the dry eyes and mild redness from long hours on electronic screens, or the headache of early wind-heat colds. Not for those with spleen-stomach cold and frequent diarrhea, nor pregnant and breastfeeding women. Suggested: 2–3 times a week, one cup each time; not for long-term continuous drinking.

Porridge — Gu Jing Cao Zhou: Gu Jing Cao 5 g, Jing Mi 50 g, a little Bai Tang. First decoct the Gu Jing Cao in water 15 minutes, take the liquid and discard the dregs, then cook the rinsed rice into porridge, and add a little white sugar when done. Suited to the mild headache and poor appetite of wind-heat. Not for those with spleen-stomach cold; children should reduce the amount. Suggested: once every 1–2 weeks, as an auxiliary — it cannot replace a staple meal. Note: Gu Jing Cao is a medicinal slice, not an ordinary food — use under a doctor's guidance and do not casually increase the dose.

2. Decoction and Processing Differences

The raw product has a stronger clear-scattering action, fitting patterns with stronger wind-heat; the processed product acts more gently, fitting light-to-moderate daily regulation. Gu Jing Cao is light and thin in texture — decocting needs no pre-boiling and no late addition; it can be decocted with the other materials. At home, wrap the slices in gauze (to keep them from scattering after boiling), add water 2–3 cm above the herbs, soak 20 minutes, bring to a boil on high heat, then simmer 10 minutes. Different forms cannot be converted directly — the decoction dose and the tea dose differ greatly; do not equate the tea dose with the decoction dose.

3. Dosage and Course

The common dose in traditional prescriptions is 5–10 g, adjusted to the pattern — somewhat larger for eye disease and somewhat smaller for wind-heat colds. The food-therapy dose is usually 3–5 g — smaller than the medicinal dose, as an auxiliary. Long-term continuous use is not advised: generally no more than 1 week continuously; if the symptoms do not ease, consult a doctor. Special groups — children, the elderly, and people with liver or kidney impairment — should adjust the dose or avoid use; consult a doctor or pharmacist first.

Contraindications & Safety Warnings

1. Who Should Avoid It

Spleen-stomach cold with frequent diarrhea — the clear-scattering nature may worsen the deficiency-cold symptoms.
Pregnancy and breastfeeding — there is no sufficient safety basis yet; avoid self-use.
Children and the elderly — special constitutions; be careful with medication and use under a doctor's guidance.
Liver or kidney impairment — avoid use to avoid adding burden to the liver and kidney.
Allergy to Gu Jing Cao or Eriocaulaceae (pipewort-family) plants — do not use.
Those in special treatment — such as anticoagulant therapy or chemotherapy — consult a doctor before deciding.

2. Interactions and Diet Notes

There is no clearly documented interaction between Gu Jing Cao and specific drugs, but it may have potential effects with anticoagulants, blood-pressure medications, and blood-sugar medications — consult a doctor. It may affect drug absorption, especially gastrointestinal drugs — if taken together, stagger the timing. There is no sufficient evidence for a general "food clash" between ordinary foods, but certain herbs can interact with specific drugs — anyone on medication should consult a doctor or pharmacist first.

3. Adverse Reactions and Overdose Risk

Reasonable daily use of Gu Jing Cao generally shows no obvious adverse reactions; with overdose, gastrointestinal discomfort may appear — nausea, vomiting, and diarrhea. If marked discomfort, allergy signs (rash, itching), persistent vomiting, breathing difficulty, altered consciousness, or rapidly worsening symptoms appear, stop at once and seek medical care.

Frequently Asked Questions About Gu Jing Cao

What is Gu Jing Cao? Are Mu Zei and Ju Hua the same?

Gu Jing Cao (谷精草) is the dried flower head with peduncle of Eriocaulon buergerianum (Eriocauli Flos), a common Chinese herb centered on dispersing wind-heat, brightening the eyes and removing nebula. Mu Zei disperses wind-heat and removes nebula, leaning to cloud nebula. Ju Hua disperses wind and clears heat to brighten the eyes, leaning to wind-heat. The three cannot be interchanged by equal weight. Write Gu Jing Cao. Use caution in yin deficiency and blood depletion.

What is the composition and traditional use of Gu Jing Cao?

Pharmacopoeial name Gu Jing Cao, Latin Eriocaulon buergerianum. Acrid and sweet, neutral; enters the Liver and Lung channels. It acts to disperse wind-heat, brighten the eyes and remove nebula. It is used for wind-heat red eyes with swelling, pain and photophobia, eyes with nebula, and wind-heat headache. Disperses wind-heat and removes nebula.

How do you choose raw versus prepared? Can Mu Zei replace it?

Used raw. Mu Zei leans to removing nebula without specialized eye-brightening; it cannot replace the formula by equal weight. Commercial products follow regulated processing; do not self-modify.

What is the usual dosage? Can it be drunk daily as an eye-brightening tea?

Decocted, 5-10 g. Modern use requires a practitioner to name the dose. It is not a four-season “eriocaulon tea.” Yin deficiency and blood depletion only injure further. Red eyes need a practitioner to name a short course; it does not replace assessment.

What are the contraindications? Can it be used in pregnancy?

Not suitable for eye disorders from yin deficiency and blood depletion. Pregnancy requires practitioner assessment. Stop if eye swelling or fatigue appears. Sudden vision loss or severe eye pain need immediate medical care.

Can Gu Jing Cao disperse wind-heat, brighten the eyes and remove nebula?

It can help wind-heat red eyes with swelling, pain and photophobia, eyes with nebula, and wind-heat headache. It disperses wind-heat, brightens the eyes and removes nebula—not a specific for every red eye or every headache.

Can Gu Jing Cao be drunk daily as an eye-brightening or nebula-removing tea?

Wind-heat red eyes may enter a short formula; yin deficiency and blood depletion only injure further. “Eriocaulon must brighten the eyes” does not replace assessment. Dispersing wind-heat, brightening the eyes and removing nebula should be named by a practitioner with form and dose.

How do you choose among Gu Jing Cao, Mu Zei, Ju Hua, Jue Ming Zi and Chan Tui?

Gu Jing Cao disperses wind-heat while brightening the eyes and removing nebula, leaning to wind-heat red eyes and nebula. Mu Zei disperses wind-heat and removes nebula, leaning to cloud nebula. Ju Hua disperses wind and clears heat to brighten the eyes, leaning to wind-heat. Jue Ming Zi clears the Liver and brightens the eyes, leaning to Liver heat. Chan Tui disperses wind-heat and brightens the eyes, leaning to wind-heat. Brightening the eyes and removing nebula favor Gu Jing Cao; cloud nebula favors Mu Zei; wind-heat favors Ju Hua; Liver heat favors Jue Ming Zi; wind-heat favors Chan Tui. They may be referenced after pattern differentiation; yin deficiency and blood depletion forbids large Gu Jing Cao.

How is Gu Jing Cao commonly modified? What is the representative use?

Depends on the pattern. Red eyes may add Ju Hua; nebula may add Mu Zei. Write Gu Jing Cao; do not replace the eye-brightening action with an equal weight of Mu Zei.

How do you choose and store Gu Jing Cao?

Choose regulated Chinese medicinal materials with intact flower heads. Moldy, damp, or abnormal-smelling lots are discarded. Store cool and dry. Buy “Gu Jing Cao”; do not replace dispersing wind-heat, brightening the eyes and removing nebula with an equal weight of Mu Zei or Ju Hua.

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Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.