Herb Flower (花 huā)

Xuan Fu Hua

Inula flower · 旋覆花

Inula japonica Thunb. · Flos Inulae

Also known as: Jin Fei Hua (金沸花), Quan Fu Hua (全福花), Jin Qian Hua (金钱花),

Images shown are for educational purposes only

Xuán Fù Huā (Inula flower) is a distinctive herb known for its downward-directing action, making it especially useful for persistent belching, nausea, and coughs with copious phlegm. While most flower-based herbs tend to lift and disperse upward, this one works in the opposite direction, helping to calm a rebellious stomach and clear phlegm from the chest and lungs. It is one of the most important herbs for digestive complaints involving bloating, a sense of fullness in the upper abdomen, and stubborn belching that does not resolve on its own.

TCM Properties

Temperature

Slightly Warm

Taste

Bitter (苦 kǔ), Acrid / Pungent (辛 xīn), Salty (咸 xián)

Channels entered

Lungs, Spleen, Stomach, Large Intestine

Parts used

Flower (花 huā)

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What This Herb Does

Every herb has a specific set of actions — here's what Xuan Fu Hua does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Xuan Fu Hua is primarily used to support these areas of health:

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Xuan Fu Hua performs to restore balance in the body:

How these actions work

'Descends Qi' refers to Xuán Fù Huā's ability to redirect Qi that is moving upward back to its proper downward course. In both the Lungs and the Stomach, Qi should naturally descend. When Lung Qi rebels upward, it causes coughing and wheezing. When Stomach Qi rebels upward, it causes belching, hiccups, nausea, and vomiting. Xuán Fù Huā is especially prized among flower-type herbs because, as a classical teaching puts it, 'all flowers ascend, but Xuán Fù Huā alone descends.' This makes it a key herb for redirecting rebellious Qi in the chest and upper digestive tract.

'Dissolves phlegm' means this herb breaks up accumulations of thick, sticky phlegm that block the airways or sit heavily in the chest and stomach area. Its bitter flavour drains and dries dampness, its pungent flavour opens and disperses, and its salty flavour softens hardened phlegm nodules. It is particularly suited to cold-type phlegm (thin, white, copious sputum) rather than hot, yellow phlegm, because of its slightly warm nature.

'Promotes water metabolism' indicates that Xuán Fù Huā helps the body move and expel accumulated fluids, particularly thin fluid accumulations (called phlegm-fluids or tán yǐn) that pool in the chest or beneath the ribcage. This action works hand-in-hand with its phlegm-dissolving function.

'Stops vomiting' specifically refers to its ability to calm a rebellious Stomach by directing Stomach Qi downward. It is most commonly used for persistent belching (known as ài qì), hiccups, or nausea that arise from a combination of Stomach weakness and phlegm obstruction. It is not used for vomiting from acute food poisoning or hot-type conditions.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony. Xuan Fu Hua is used to help correct these specific patterns.

Why Xuan Fu Hua addresses this pattern

Xuán Fù Huā directly addresses this pattern through its core actions of descending Qi and dissolving phlegm. When the Stomach is weakened and phlegm accumulates in the middle burner, Stomach Qi fails to descend and instead rebels upward, causing persistent belching, nausea, or vomiting. The herb's slightly warm nature suits the cold-type phlegm that typically underlies this pattern. Its bitter flavour drains and descends, its pungent flavour disperses the phlegm obstruction, and its salty flavour softens hardened phlegm masses that create a feeling of fullness and blockage below the heart. By entering both the Stomach and Spleen channels, it targets the source of the problem directly.

A practitioner would look for one or more of these signs

Belching

Persistent, frequent belching that does not relieve the discomfort

Nausea

Nausea or vomiting of thin, watery fluid or saliva

Abdominal Pain

A sense of hardness and fullness in the upper abdomen (epigastric area)

Hiccups

Stubborn hiccups from Stomach Qi rebellion

Commonly Used For

These are conditions where Xuan Fu Hua is frequently used — but only when they arise from the specific patterns it addresses, not in all cases

TCM Interpretation

TCM understands acid reflux as a failure of Stomach Qi to descend properly. Normally, the Stomach receives food and directs it downward for further digestion. When the Stomach is weakened (often by improper eating, emotional stress, or prior illness), its Qi reverses course and pushes upward, carrying with it turbid fluids, phlegm, and acidic contents. In many cases, phlegm and dampness accumulate in the middle burner, creating a physical obstruction that further blocks the normal downward flow. The key organs involved are the Stomach (whose Qi rebels upward), the Spleen (which fails to transform fluids, allowing phlegm to form), and sometimes the Liver (whose Qi can laterally invade and disrupt the Stomach).

Why Xuan Fu Hua Helps

Xuán Fù Huā is one of the most direct herbs for addressing the core mechanism of reflux: rebellious Stomach Qi combined with phlegm obstruction. Its strong descending action redirects the upward-moving Stomach Qi back to its proper downward path. Simultaneously, its phlegm-dissolving and water-moving properties clear the obstruction that is fuelling the rebellion. The salty flavour softens hardened phlegm masses that create the characteristic sensation of fullness and blockage in the epigastric area. In clinical practice, it is almost always combined with other herbs (most famously Dài Zhě Shí / hematite and Bàn Xià / pinellia) to create a comprehensive approach that not only descends Qi and resolves phlegm but also strengthens the underlying Stomach weakness.

Also commonly used for

Chronic Gastritis

Especially with epigastric fullness, belching, and nausea

Hiccups

Persistent or intractable hiccups

Nausea

Nausea and vomiting from Stomach weakness and phlegm

Asthma

Wheezing with phlegm obstruction

Dyspepsia

Functional dyspepsia with bloating and belching

Esophageal Disorders

Difficulty swallowing with a sense of obstruction

Herb Properties

Every herb has an inherent temperature, taste, and affinity for specific channels — these properties determine how it interacts with the body

Temperature

Slightly Warm

Taste

Bitter (苦 kǔ), Acrid / Pungent (辛 xīn), Salty (咸 xián)

Channels Entered

Lungs Spleen Stomach Large Intestine

Parts Used

Flower (花 huā)

Dosage & Preparation

These are general dosage guidelines for Xuan Fu Hua — always follow your practitioner's recommendation, as dosages vary based on the formula and your individual condition

Standard dosage

3-9g

Maximum dosage

Up to 12g under practitioner supervision for severe phlegm obstruction or stubborn belching. Standard safe range is 3-9g.

Dosage notes

Use the lower end of the range (3-5g) when the primary goal is to harmonise the Stomach and stop mild belching. Use higher doses (6-9g) for stubborn phlegm accumulation with chest fullness or cough with copious phlegm. When honey-processed (蜜旋覆花), the herb has an enhanced moistening effect on the Lungs and is preferred for cough with difficult-to-expectorate phlegm. Avoid excessive or prolonged use in patients with underlying Qi or Yin deficiency, as the herb's dispersing nature can scatter righteous Qi.

Preparation

Must be wrapped in cloth before decocting (包煎, bao jian). The flower heads have fine pappus hairs and woolly bristles that do not dissolve in water and will irritate the throat, causing coughing and itching if swallowed. Alternatively, the decoction can be carefully filtered through fine cloth after cooking to remove all fibres. This is one of the most important preparation requirements in the entire materia medica and must not be overlooked.

Processing Methods

In TCM, the same herb can be prepared in different ways to change its effects — here's how processing alters what Xuan Fu Hua does

Processing method

The cleaned flowers are mixed with refined honey (approximately 25g honey per 100g herb), briefly steeped, then stir-fried over gentle heat until no longer sticky to the touch.

How it changes properties

Honey processing moderates the herb's drying and descending nature and adds a moistening, Lung-nourishing quality. The temperature remains slightly warm but the overall action becomes gentler and more润 (moistening). The honey enhances the herb's ability to soothe the Lung and ease cough, while reducing its harsh descending force.

When to use this form

Preferred for chronic cough with phlegm where the Lungs are somewhat dry or weakened and the patient cannot tolerate the raw herb's strong descending action. Better suited than raw Xuán Fù Huā for elderly or debilitated patients with lingering cough.

Common Herb Pairs

These ingredients are traditionally combined with Xuan Fu Hua for enhanced therapeutic effect

Dai Zhe Shi
Dai Zhe Shi 3:1 (Xuán Fù Huā 9g : Dài Zhě Shí 3g, following the Shang Han Lun original ratio)

Xuán Fù Huā descends Qi and dissolves phlegm while Dài Zhě Shí (hematite) adds heavy mineral weight to powerfully anchor and drag rebellious Qi downward. Together they create a much stronger descending force than either alone, addressing both the phlegm component (Xuán Fù Huā) and the raw upward momentum of rebellious Qi (Dài Zhě Shí). This is the most famous herb pair for treating persistent belching, hiccups, and vomiting from Stomach Qi rebellion with phlegm obstruction.

When to use: Persistent belching, hiccups, nausea, or vomiting due to Stomach weakness with phlegm obstruction and Qi rebellion, especially when the Qi reversal is strong and phlegm is prominent.

Ban Xia
Ban Xia 1:1 (e.g. 9g each)

Both herbs descend Qi and resolve phlegm, but they work through complementary mechanisms. Xuán Fù Huā uses its salty-bitter-pungent combination to soften, disperse, and descend phlegm, while Bàn Xià dries dampness, transforms phlegm, and harmonizes the Stomach. Together they provide a comprehensive approach to phlegm-related Stomach and Lung disorders, addressing both the phlegm itself and the rebellious Qi it produces.

When to use: Cough with copious phlegm, or nausea and vomiting with phlegm obstruction in the middle burner. Both cold-phlegm cough and phlegm-related Stomach Qi rebellion.

Xiang Fu
Xiang Fu 1:1

Xuán Fù Huā descends Qi and dissolves phlegm, while Xiāng Fù (Cyperus) moves Liver Qi and regulates Qi flow throughout the body. Together they address cases where Liver Qi stagnation disrupts the normal flow of Qi in the chest and ribcage, causing pain, and where phlegm further complicates the obstruction. The combination both unblocks Liver Qi and descends the resulting turbidity.

When to use: Chest and rib-side pain from Qi stagnation complicated by phlegm, particularly when Liver Qi invades the Stomach causing both flank pain and digestive upset. This pair forms the core of Xiāng Fù Xuán Fù Huā Tāng from the Wen Bing Tiao Bian.

Sheng Jiang
Sheng Jiang 1:1.5 to 1:2 (Xuán Fù Huā 9g : Shēng Jiāng 15g, as in Xuán Fù Dài Zhě Tāng)

Shēng Jiāng (fresh ginger) warms the Stomach, disperses cold, and stops vomiting, while Xuán Fù Huā descends Qi and dissolves phlegm. Together they powerfully address cold-phlegm accumulation with Stomach Qi rebellion. Ginger also helps scatter the water-dampness that feeds phlegm formation, amplifying Xuán Fù Huā's phlegm-resolving action.

When to use: Nausea, vomiting, and belching from Stomach cold with phlegm, especially when the middle burner feels cold and blocked.

Key Formulas

These well-known formulas feature Xuan Fu Hua in a prominent role

Xuanfu Daizhe Tang 旋覆代赭湯 King

This is the single most important formula showcasing Xuán Fù Huā's properties. From the Shang Han Lun, it treats Stomach weakness with phlegm obstruction and Qi rebellion, manifesting as persistent belching, epigastric fullness, and nausea. Xuán Fù Huā serves as the King herb at 9g (the highest dose), demonstrating its core action of descending Qi and dissolving phlegm. The formula pairs it with Dài Zhě Shí for heavy anchoring, Bàn Xià and Shēng Jiāng for additional phlegm resolution and Stomach warming, and Rén Shēn for Qi tonification.

Jin Fei Cao San 金沸草散 King

From the Tai Ping Hui Min He Ji Ju Fang (also attributed to the Lei Zheng Huo Ren Shu tradition), this formula uses Xuán Fù Huā (under its alternate name Jīn Fèi Cǎo) as the primary herb for dispersing wind-cold, descending Qi, and resolving phlegm in the Lungs. It showcases the herb's respiratory applications, treating external wind-cold invasion with cough, nasal congestion, copious sticky phlegm, and headache.

Xuan Fu Hua Tang 旋覆花湯 Deputy

From Wú Jū Tōng's Wen Bing Tiao Bian, this formula pairs Xuán Fù Huā with Xiāng Fù to treat chest and rib-side pain from disharmony of Qi and Blood complicated by phlegm. It highlights a lesser-known action of Xuán Fù Huā: its ability to open the collaterals and move stagnation in the lateral chest area, demonstrating its versatility beyond simple Stomach Qi descent.

Comparable Ingredients

These ingredients have overlapping uses — here's how to tell them apart

Zi Su Zi
Xuan Fu Hua vs Zi Su Zi

Both Xuán Fù Huā and Sū Zǐ (perilla seed) descend Qi and resolve phlegm, making them useful for cough and wheezing. However, Sū Zǐ is oilier and moister, giving it a laxative side-effect that benefits patients with constipation alongside their cough. Sū Zǐ focuses more on the Lungs and has less effect on the Stomach, so it is less useful for belching and vomiting. Xuán Fù Huā's salty flavour gives it a unique ability to soften hardened phlegm masses, and its Stomach-descending action makes it the better choice when digestive Qi rebellion (belching, hiccups, nausea) is prominent.

Zhi Shi
Xuan Fu Hua vs Zhi Shi

Both herbs address fullness, bloating, and Qi stagnation in the epigastric area. However, Zhǐ Shí (immature bitter orange) works by breaking up Qi stagnation and driving it downward through the intestines, and is better for food stagnation and constipation. Xuán Fù Huā specifically targets phlegm as the root of the obstruction and focuses on redirecting rebellious Stomach and Lung Qi. When the fullness comes with prominent phlegm, belching, and nausea, Xuán Fù Huā is preferred. When it comes with food retention and constipation, Zhǐ Shí is more appropriate.

Zhu Ru
Xuan Fu Hua vs Zhu Ru

Both herbs descend Stomach Qi and stop vomiting. The critical difference is thermal nature: Zhú Rú (bamboo shavings) is cool and clears heat, making it suited for nausea and vomiting from Stomach Heat or phlegm-heat. Xuán Fù Huā is slightly warm and better for cold-phlegm patterns. Choosing between them depends on whether the vomiting involves heat signs (yellow tongue coating, thirst, irritability) or cold signs (white coating, preference for warmth, watery vomit).

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Xuan Fu Hua

The Chinese Pharmacopoeia recognises two official source species: Inula japonica Thunb. and Inula britannica L. (Eurasian Inula), which are closely related and interchangeable. However, several regional substitutes exist that differ in quality and efficacy. In Hubei Province, Inula cappa (湖北旋覆花) flower heads are sometimes used, but studies show these lack significant cough-suppressing activity. In Sichuan, Guizhou, and Chongqing, Inula helianthus-aquatica (水朝阳旋覆花) is used locally, with larger, more compact flower heads that do not scatter as easily. It reportedly lacks expectorant activity. Key distinguishing features of authentic Xuan Fu Hua include: easily scattered flower heads, approximately 30 or more white pappus bristles per achene. Regional substitutes tend to have more compact heads with fewer pappus bristles (4 to 10). Other potential adulterants include Shan Huang Ju (山黄菊), which has larger heads with only 4 to 6 awn-like pappus bristles.

Educational content — always consult a qualified healthcare provider or TCM practitioner before using any herb.

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Xuan Fu Hua

Slightly toxic

Xuan Fu Hua is classified as slightly toxic (有小毒) in some references, primarily due to the fine pappus hairs (bristles) on the flower head that can physically irritate the throat and digestive tract, causing itching, coughing, and vomiting if ingested directly. This is a mechanical irritation rather than a chemical toxicity. When wrapped in cloth for decoction (包煎), this risk is eliminated. At standard dosages, no significant systemic toxicity has been reported. Overdose in animal studies has caused rapid breathing, excitement, tremors, and convulsions. The LD50 of the decoction in mice by intraperitoneal injection is approximately 22.5 g/kg. The sesquiterpene lactone inulicin from the plant has relatively low toxicity (oral LD50 in mice: 1,330 mg/kg).

Contraindications

Situations where Xuan Fu Hua should not be used or requires extra caution

Avoid

Yin deficiency with chronic dry cough (阴虚劳嗽). The herb's warm, dispersing nature can further deplete Yin fluids and worsen the cough.

Avoid

Wind-Heat or dryness-type cough with yellow sticky phlegm. Xuan Fu Hua is warm and suited to cold-phlegm patterns, not heat-type conditions. Using it in Heat patterns can intensify coughing.

Caution

Qi deficiency without phlegm or fluid retention. Xuan Fu Hua has a dispersing quality that can further scatter Qi in deficient patients who lack the pathological excess it is designed to address.

Caution

Loose stools or diarrhea from Spleen deficiency. Classical sources note the herb can 'cold-drain the large intestine' (冷利大肠) by over-dispersing internal Qi, worsening diarrhea.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

No specific classical prohibition against use in pregnancy, but caution is advised. Xuan Fu Hua's downward-directing and Qi-moving properties could theoretically disturb the fetus, and its mild dispersing action may not be suitable during pregnancy when Qi should be consolidated. Use only if clearly indicated and under practitioner supervision. Avoid in early pregnancy or in cases of threatened miscarriage.

Breastfeeding

No specific classical or modern warnings regarding breastfeeding. Classical sources actually mention that Xuan Fu Hua can promote lactation flow (行阳明乳汁不通). However, no formal safety studies on transfer through breast milk exist. Use at standard doses under practitioner guidance if clinically indicated.

Children

Xuan Fu Hua may be used in children at reduced doses proportional to age and body weight, typically one-third to one-half of the adult dose. As with adult use, it must be wrapped in cloth (包煎) before decocting to prevent the fine hairs from irritating the child's throat. Extra caution is warranted in young children whose digestive systems are more delicate, as the herb's dispersing quality may easily affect Spleen Qi. Not recommended for infants or very young children without specific practitioner guidance.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Xuan Fu Hua

No well-documented pharmaceutical drug interactions have been established for Xuan Fu Hua in published clinical literature. Theoretical considerations include:

  • Anticoagulant/antiplatelet medications: Classical sources state Xuan Fu Hua 'opens blood vessels' (通血脉). While this is not equivalent to anticoagulant action, caution is theoretically warranted when combining with warfarin, heparin, or antiplatelet agents, particularly at higher doses.
  • Diuretic medications: The herb has demonstrated mild diuretic activity in animal studies, so concurrent use with pharmaceutical diuretics could theoretically have additive fluid-depleting effects.

These are theoretical considerations, not established clinical interactions. Patients on medication should consult their healthcare provider before using this herb.

Dietary Advice

Foods and dietary considerations when taking Xuan Fu Hua

When taking Xuan Fu Hua for cold-phlegm or Stomach Qi rebellion patterns, avoid cold, raw, and greasy foods that can generate more phlegm or further impair Spleen function. Favour warm, easily digestible foods such as cooked grains, ginger tea, and lightly cooked vegetables. Avoid excessive dairy, iced drinks, and rich fatty foods during treatment.

Botanical Description

Physical characteristics and morphology of the Xuan Fu Hua source plant

Inula japonica Thunb. (and the closely related Inula britannica L.) is a perennial herbaceous plant in the Asteraceae (daisy) family. It grows from short rhizomes and reaches 30 to 100 cm in height, with erect, finely hairy stems that branch near the top. The mid-stem leaves are oblong to lanceolate (willow-shaped), about 10 cm long, sessile or semi-clasping at the base, with appressed fine hairs on both surfaces. Lower leaves wither before flowering.

The flower heads are radiate (daisy-like), about 2.5 to 3.5 cm across, composed of a ring of golden-yellow ray florets surrounding a dense center of tubular florets. Each flower head sits atop a slender stalk, and the involucral bracts are arranged in overlapping rows (imbricate pattern) with white woolly hairs. After flowering, small elliptical achenes develop, each topped with a pappus of about 30 white bristles.

The plant grows naturally on mountain slopes, roadsides, moist grasslands, riverbanks, and field ridges at elevations of 150 to 2,400 metres across temperate East Asia. It thrives in warm, humid conditions with well-drained soil and tolerates poor soils, spreading readily via rhizomes.

Sourcing & Harvesting

Where Xuan Fu Hua is sourced, when it's harvested or collected, and how to assess quality

Harvesting season

Summer to autumn, when the flower heads are in full bloom (typically July to October). Collected, cleaned of debris, then shade-dried or sun-dried.

Primary growing regions

Xuan Fu Hua (Inula japonica) is produced throughout most of China, with primary production in the northeast (Heilongjiang, Jilin, Liaoning), north (Hebei, Shandong, Shanxi), east (Jiangsu, Zhejiang), and central (Henan, Hubei) regions. The best quality (dao di yao cai) is traditionally considered to come from Zhejiang Province, where the flower heads are large, pale yellow in colour, with long pappus bristles and minimal stem or leaf debris. The closely related Inula britannica (Eurasian Inula) is mainly produced in northeast China, north China, and Shaanxi, Gansu, Xinjiang, and Henan. Zhang Xichun noted that the finest Xuan Fu Hua came from the area around Wudi Tai in Hebei.

Quality indicators

Good quality Xuan Fu Hua flower heads are flattened spherical or nearly round, about 1 to 2 cm across. The involucral bracts should be greyish-yellow, arranged in neat overlapping layers (like tiles), and covered with fine white woolly hairs. The ray florets should be yellow (not darkened or discoloured), and the tubular florets in the centre should be brownish-yellow. There should be abundant white pappus bristles at the top of each tiny fruit. The best quality is light in weight, not overly broken or scattered, with a faint aroma and a slightly bitter taste. Flower heads from Zhejiang that are pale yellow, large, with long pappus hairs, unbroken, and free from stems, leaves, or other debris are considered the finest. Avoid material that is dark, musty, heavily fragmented, or mixed with excessive stem pieces.

Classical Texts

Key passages from the classical Chinese medical texts that describe Xuan Fu Hua and its therapeutic uses

Shen Nong Ben Cao Jing (《神农本草经》)

Original: 主结气,胁下满,惊悸。除水,去五脏间寒热,补中,下气。

Translation: It treats bound Qi, fullness below the ribs, and palpitations from fright. It eliminates water, removes cold and heat from among the five Zang organs, supplements the centre, and directs Qi downward.

Ming Yi Bie Lu (《名医别录》)

Original: 消胸上痰结,唾如胶漆,心胁痰水,膀胱留饮,风气湿痹,皮间死肉,目中眵,利大肠,通血脉,益色泽。

Translation: It dissolves phlegm accumulation in the upper chest, treats sputum as thick as glue or lacquer, phlegm-fluid in the Heart and rib regions, retained fluid in the Bladder, Wind-Damp impediment, dead flesh beneath the skin, and eye discharge. It frees the large intestine, opens the blood vessels, and improves complexion.

Ben Jing Feng Yuan (《本经逢原》)

Original: 旋覆花升而能降,肺与大肠药也。其功在于开结下气,行水消痰,治惊悸,祛痞坚,除寒热,散风湿,开胃气,止呕逆,除噫气。

Translation: Xuan Fu Hua ascends yet is able to descend; it is a herb of the Lung and Large Intestine. Its merit lies in opening bound accumulations, directing Qi downward, moving water, dissolving phlegm, treating palpitations, dispelling hard lumps, eliminating cold and heat, scattering Wind-Damp, opening Stomach Qi, stopping vomiting, and relieving belching.

Tang Ye Ben Cao (《汤液本草》)

Original: 发汗吐下后,心下痞,噫气不除者宜此。

Translation: After inducing sweating, vomiting, or purging, when there is glomus below the Heart and belching that will not resolve, this herb is appropriate.

Historical Context

The history and evolution of Xuan Fu Hua's use in Chinese medicine over the centuries

Xuan Fu Hua was first recorded in the Shen Nong Ben Cao Jing (Divine Farmer's Classic of Materia Medica), where it was classified as a lower-grade herb under the name Jin Fei Cao (金沸草, 'golden boiling herb'). Over time, the name Xuan Fu Hua came to refer specifically to the flower heads, while Jin Fei Cao or Xuan Fu Geng (旋覆梗) came to denote the stems and leaves, which have somewhat different clinical applications. The character 覆 (fu, 'to turn over, to cover') and 旋 (xuan, 'to rotate') refer to the way the flower head droops or turns. Other classical aliases include Dai Zhen (戴椹), Sheng Zhen (盛椹), and Dao Geng (盗庚, 'stealing the metal Qi'), the last name referencing the flower's blooming during late summer when autumn's metal Qi is still weak.

The herb is most famously featured as the chief herb in Zhang Zhongjing's Xuan Fu Dai Zhe Tang (旋覆代赭汤, Inula and Hematite Decoction) from the Shang Han Lun, used for belching, glomus, and vomiting after inappropriate sweating, vomiting, or purging. A well-known classical saying states 'among all flowers, all ascend; only the Inula flower uniquely descends' (诸花皆升,唯覆花独降), though some scholars have debated this characterisation, arguing the flower's light, floating quality also allows ascending and outward dispersal.

A romantic folk legend from the Qin-Han period tells of a young woman named Xuan Fu in Lin'an who died rather than marry against her will, and the flower that grew on her grave was named after her. The Qing dynasty poet-physician Zhao Jinshu summarised the herb's properties elegantly in his Ben Cao Shi (Materia Medica Poems).

Modern Research

4 published studies investigating the pharmacological effects or clinical outcomes of Xuan Fu Hua

1

Review: Inula Sesquiterpenoids — Structural Diversity, Cytotoxicity and Anti-tumor Activity (2014)

Wang GW, Qin JJ, Cheng XR, Shen YH, Shan L, Jin HZ, Zhang WD. Expert Opinion on Investigational Drugs, 2014, 23(3): 367-380.

A systematic review of sesquiterpene compounds from the Inula genus. Japonicone A, a dimeric sesquiterpene lactone from Inula japonica, showed potent anti-tumour activity against Burkitt's lymphoma in both laboratory and animal models. Acetylbritannilactone was found capable of suppressing abnormal blood vessel muscle cell overgrowth. Clinical studies on chronic bronchitis and asthma using Inula japonica ethanol extract were reported to be underway in South Korea.

PubMed
2

Sesquiterpene Lactones from Inula britannica: Cytotoxic and Apoptotic Effects on Human Cancer Cell Lines (2006)

Bai N, Lai CS, He K, Zhou Z, Zhang L, Quan Z, Zhu N, Zheng QY, Pan MH, Ho CT. Journal of Natural Products, 2006, 69(4): 531-535.

Three new and four known sesquiterpene lactones were isolated from the flowers of Inula britannica var. chinensis (the Eurasian Inula used as Xuan Fu Hua). Two compounds bearing alpha-methylene gamma-lactone groups showed modest cytotoxicity and apoptosis-inducing activity against human colon (COLO 205, HT 29), leukaemia (HL-60), and gastric (AGS) cancer cells.

Link
3

Pharmacological Properties of Inulicin, a Sesquiterpene Lactone from Inula japonica (1981)

Farmakologiia i Toksikologiia, 1981, 44(3): 340-343.

Inulicin, a sesquiterpene lactone isolated from Inula japonica, demonstrated a broad range of pharmacological effects at doses of 5 to 60 mg/kg in animal models: stimulation of the central nervous system and intestinal smooth muscle, anti-inflammatory and anti-ulcer activity, capillary-strengthening effects, and mild diuretic properties. It showed relatively low toxicity with an oral LD50 of 1,330 mg/kg in mice.

PubMed
4

Sesquiterpenoids from Inula japonica as Potential Antitumor Leads for Paclitaxel-Resistant Non-Small-Cell Lung Cancer (2020)

Bioorganic Chemistry, 2020, 101: 104045.

Twenty-five sesquiterpene derivatives (including three new dimers) were isolated from Inula japonica flowers and tested against paclitaxel-resistant lung cancer cells. One compound showed an IC50 of 0.34 micromolar, more potent than paclitaxel itself, arresting the cell cycle, inducing apoptosis, and reversing multidrug resistance by suppressing ABC transporter protein expression.

PubMed

Research on individual TCM herbs is growing but still limited by Western clinical trial standards. These studies provide emerging evidence and should be considered alongside practitioner expertise.