Western Herbalism Properties

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Traditional Uses

In China, Korea and Japan Carpesium divaricatum (Chinese 'jin wa er') has long been used as a traditional medicine and seasonal food. Whole-plant preparations have been applied as antipyretic, analgesic, anti-inflammatory and antiparasitic remedies, used for the common cold, fevers, toothache, sore throat, parasitic infestations, diarrhea and urinary tract infections (East Asian materia medica; Wajs-Bonikowska et al., 2019).

Botanical Description

Carpesium divaricatum is a perennial herb of the family Asteraceae native to eastern Asia, including China, Korea, Japan and the Russian Far East, where it grows along forest margins, in grassy clearings, on slopes and in disturbed moist ground. It forms an erect, branching plant 30 to 100 cm tall, with the upper stems often widely spreading (divaricate), as the name suggests. The leaves are alternate, ovate to lance-shaped, with toothed or entire margins, the lower ones stalked and the upper becoming sessile, and the foliage is more or less softly hairy and aromatic. The flower heads are small, nodding, yellow and discoid, lacking conspicuous ray florets, and are borne singly at the ends of branches subtended by leafy bracts. The fruit is a slender, ribbed achene tipped with a sticky, glandular beak that aids dispersal by clinging to animals. The plant is rich in germacrane-type sesquiterpene lactones.

Native Region: China South-Central, China Southeast, Japan, Korea, Manchuria, Nansei-shoto, Taiwan

Active Constituents

Cardivarolide G

Germacranolide sesquiterpene lactone

Concentration: Minor isolate from the aerial parts; not routinely quantified in commercial material

A type IV germacranolide of the 3-oxo-germacran-6,12-olide series isolated from the flowering aerial parts. At sub-cytotoxic concentrations of 0.5 to 2.5 micromolar it reduced IL-1beta, IL-8, TNF-alpha and CCL2 release from LPS-stimulated human neutrophils and dose-dependently suppressed reactive oxygen species generation in f-MLP-stimulated neutrophils, which is the best current chemical rationale for the plant's folk use as an inflammation-relieving remedy.

Ivalin

Eudesmanolide sesquiterpene lactone

Concentration: Minor constituent of the whole plant

A eudesmane-type lactone isolated from the whole plant. It depolymerises microtubules and triggers mitochondria-mediated apoptosis in SMMC-7721 hepatoma cells, with loss of mitochondrial membrane potential, cytochrome c release and caspase-3 cleavage. This is laboratory cytotoxicity, not a demonstrated therapeutic effect.

12-Oxo-phytodienoic acid

Oxylipin (cyclopentenone fatty acid, jasmonate precursor)

Concentration: Isolated from the lipophilic extract of cultivated shoots

A plant oxylipin identified in the aerial parts in 2019. At 0.5 to 2.5 micromolar it significantly reduced IL-8, IL-1beta, TNF-alpha and CCL2 secretion by stimulated human neutrophils, so part of the anti-inflammatory activity attributed to the plant is not sesquiterpene-lactone-dependent.

Chlorogenic acid and related caffeoylquinic acids

Hydroxycinnamic acid ester (phenolic acid)

Concentration: Present in the hydroalcoholic extract of aerial parts; part of a set of 17 tentatively identified caffeic acid derivatives

The dominant water-soluble phenolics of the aerial parts and the fraction most likely to survive a conventional decoction. They contribute antioxidant capacity but have no species-specific efficacy data.

Butyryl and methylbutyryl tricaffeoylhexaric acids

Acylated caffeic acid ester (hexaric acid conjugate)

Concentration: Trace to minor in hydroalcoholic extract of aerial parts

Rarely occurring acylated tricaffeoyl esters reported as previously unknown constituents of the species in 2019. They are useful as chemical markers distinguishing the aerial-part extract from other Carpesium drugs, but no pharmacology has been published for them.

alpha-Pinene

Monoterpene hydrocarbon

Concentration: About 40 percent of the essential oil of the aerial parts; up to 1.8 percent of root oil

The principal volatile of the shoot oil and the reason the fresh herb smells resinous rather than thyme-like. It is a weak antimicrobial and a skin and airway irritant at high concentrations; the concentrations reached in a water decoction are far below those tested in vitro.

10-Isobutyryloxy-8,9-epoxythymyl isobutyrate

Thymol derivative (aromatic monoterpenoid ester)

Concentration: 18.1 to 29.2 percent of the root essential oil; thymol derivatives exceed 60 percent of field-grown root oil versus about 6 percent of aerial-part oil

The dominant volatile of the root, and the clearest evidence that root and aerial-part material of this species are chemically different drugs. Chinese and Korean folk practice uses the whole plant or aerial parts, so root-derived thymol ester data should not be read across to the herb.

⚠ Drug Interactions

Carpesium cernuum (Yan Guan Tou Cao, Wa Er Cao)

Moderate Evidence: Established

The vernacular names are crossed in the Chinese literature. Quanguo Zhongcaoyao Huibian files Wa Er Cao under both Carpesium cernuum and C. divaricatum and applies the name Jin Wa Er to C. cernuum, while Zhongyao Da Cidian and the regional Sichuan sources apply Jin Wa Er to C. divaricatum and call it Dao Gai Ju or Da Wa Er Cao. Material supplied as Jin Wa Er may therefore be either species. The two differ substantially in volatile chemistry, and C. cernuum root oil has its own antibacterial and cytotoxic profile.

Clinical note: Do not accept Jin Wa Er or Wa Er Cao on the label alone. Require the binomial on the certificate of analysis, and treat any dose or effect reported for one species as unverified for the other.

Scutellaria discolor (also sold as Wa Er Cao, Yi Zhi Jian)

Moderate Evidence: Established

Zhongyao Da Cidian carries a second Wa Er Cao entry, sourced from Zhonghua Bencao's citation of Yunnan Simao Zhongcaoyao Xuan, in which the drug is the whole plant of Scutellaria discolor, a mint-family species with no germacranolide chemistry whatsoever. The shared vernacular name is the entire basis of the confusion; the two plants have no constituents in common.

Clinical note: If material labelled Wa Er Cao arrives with square stems, opposite leaves and purple-backed foliage it is Scutellaria discolor, not a Carpesium. Reject it for any indication where the Carpesium sesquiterpene lactones are the intended actives.

Topical corticosteroids and other agents for allergic contact dermatitis

Theoretical Evidence: Theoretical

Folk use includes poultices of the crushed fresh plant. Carpesium divaricatum is an Asteraceae species whose principal constituents are sesquiterpene lactones, the compound class responsible for Compositae contact allergy, and the Chinese compendium entry for the drug records it as you xiao du, slightly toxic. No patch-test series has been published for this species specifically, so the risk is inferred from the family and the chemistry rather than measured. Absence of an assay is not evidence of safety.

Clinical note: Avoid fresh-plant poultices in patients with known Compositae sensitivity or unexplained plant dermatitis, and stop topical use if a spreading eczematous reaction appears rather than escalating the steroid.

Dosage Calculator

⚖ Dosage Calculator

A weight-based mathematical estimate for Carpesium divaricatum. Not a prescription.

Evidence Tier

Moderate evidence · 4 studies

Recorded studies by study design, strongest design at the top. This is a study-design tier only, not a GRADE rating: it does not weigh risk of bias, consistency or precision.

Systematic review / meta-analysis

0

Randomized controlled trial

0

Other clinical trial

0

Observational / case report

0

In vitro / animal

4

0 verified · 4 unverified

Show 4 studies

Germacranolides from Carpesium divaricatum: Some New Data on Cytotoxic and Anti-Inflammatory Activity
Carpesium divaricatum Sieb. & Zucc. Revisited: Newly Identified Constituents from Aerial Parts of the Plant and Their Possible Contribution to the Biological Activity of the Plant
Composition of Essential Oils from Roots and Aerial Parts of Carpesium divaricatum, a Traditional Herbal Medicine and Wild Edible Plant from South-East Asia, Grown in Poland
Ivalin Induces Mitochondria-Mediated Apoptosis Associated with the NF-κB Activation in Human Hepatocellular Carcinoma SMMC-7721 Cells

Other / unclassified

0

Verified: design read from PubMed for a DOI that resolves to the cited paper Unverified: taken from the study's recorded description

Clinical Studies

Germacranolides from Carpesium divaricatum: Some New Data on Cytotoxic and Anti-Inflammatory Activity

Kłeczek N, Malarz J, Gierlikowska B, Skalniak Ł, Galanty A, Kiss AK, Stojakowska A (2021) Molecules in vitro

A laboratory study, not a clinical trial. Three type IV germacranolides from the flowering aerial parts were tested. The isobutyryloxy analogue was cytotoxic to prostate, melanoma and colon carcinoma lines with IC50 values of roughly 4 to 10 micrograms per millilitre, but was also cytotoxic to normal prostate epithelium (PNT2, IC50 16.4 micrograms per millilitre), so selectivity is modest. More usefully, at sub-cytotoxic 0.5 to 2.5 micromolar concentrations two of the compounds cut IL-1beta, IL-8, TNF-alpha and CCL2 release from LPS-stimulated human neutrophils and reduced ROS generation, which supports the traditional anti-inflammatory indication at concentrations that do not kill cells.

DOI: 10.3390/molecules26154644 Link

Carpesium divaricatum Sieb. & Zucc. Revisited: Newly Identified Constituents from Aerial Parts of the Plant and Their Possible Contribution to the Biological Activity of the Plant

Kłeczek N, Michalak B, Malarz J, Kiss AK, Stojakowska A (2019) Molecules in vitro

Laboratory phytochemistry with a cell-based assay. HPLC-DAD-MSn of the hydroalcoholic extract of aerial parts identified 17 caffeic acid derivatives, including chlorogenic acids and rarely occurring butyryl and methylbutyryl tricaffeoylhexaric acids, none previously reported from the species. 12-Oxo-phytodienoic acid was isolated from cultivated shoots and, at 0.5 to 2.5 micromolar, significantly reduced IL-8, IL-1beta, TNF-alpha and CCL2 secretion by stimulated neutrophils. The paper's importance is that it shows the anti-inflammatory activity of the herb is not carried by sesquiterpene lactones alone.

DOI: 10.3390/molecules24081614 Link

Composition of Essential Oils from Roots and Aerial Parts of Carpesium divaricatum, a Traditional Herbal Medicine and Wild Edible Plant from South-East Asia, Grown in Poland

Wajs-Bonikowska A, Malarz J, Stojakowska A (2019) Molecules in vitro

Analytical chemistry, no biological endpoint. GC-MS-FID identified 145 volatiles in all, 112 in aerial parts and 80 in roots of field-grown plants. Aerial-part oil was dominated by alpha-pinene at about 40 percent with thymol derivatives near 6 percent; root oil inverted this, with thymol derivatives above 60 percent and 10-isobutyryloxy-8,9-epoxythymyl isobutyrate alone at 18 to 29 percent. The practical conclusion for a dispensary is that root and shoot are not interchangeable material.

DOI: 10.3390/molecules24234418 Link

Ivalin Induces Mitochondria-Mediated Apoptosis Associated with the NF-κB Activation in Human Hepatocellular Carcinoma SMMC-7721 Cells

Han Z, Liu FY, Lin SQ, Zhang CY, Ma JH, Guo C, Jia FJ, Zhang Q, Xie WD, Li X (2019) Molecules in vitro

A single-cell-line mechanistic study of one isolated constituent, not of the herb. Ivalin, a eudesmanolide from Carpesium divaricatum, induced apoptosis in SMMC-7721 hepatoma cells through the mitochondrial pathway, with loss of membrane potential, cytochrome c escape, caspase-3 cleavage and ROS generation, alongside NF-kappaB activation. No animal or human data follow from it.

DOI: 10.3390/molecules24203809 Link

Historical Texts

Fen Lei Cao Yao Xing

Qing dynasty, Guangxu 32 (1906)

The Sichuan regional herbal cited by Zhonghua Bencao as the earliest source (chu chu) for the drug Jin Wa Er. The drug is the whole plant of Carpesium divaricatum, gathered in the flowering period of the eighth and ninth lunar months. Taste bitter and acrid, nature cold; functions given as clearing heat and resolving toxin, dispersing swelling and stopping pain. Indications include wind-heat common cold with fever, head wind, wind-inflamed red eyes, swollen sore throat, mumps, toothache, breast abscess, sores and boils, bleeding haemorrhoids, abdominal pain with diarrhoea, and acute infantile convulsions. Internal dose 6 to 15 g decocted, or the expressed juice; externally the fresh plant is pounded and applied, or a decoction used as a wash.

Zhi Wu Ming Shi Tu Kao (Wu Qijun)

Qing dynasty, 1848

Illustrates and describes Jin Wa Er among the Asteraceae. Its treatment of the plant separately from Tian Ming Jing, the pharmacopoeial Carpesium abrotanoides, is one of the earlier explicit distinctions between the two drugs, which are otherwise persistently conflated because both are Carpesium species with the same germacranolide chemistry.

Quanguo Zhongcaoyao Huibian

Modern compendium, first edition 1975

Files the drug Wa Er Cao as the whole plant of Carpesium cernuum and Carpesium divaricatum together, records it as bitter and acrid, cold, and slightly toxic (you xiao du), and gives clearing heat and resolving toxin, dispersing swelling and stopping pain for common cold with fever, sore throat, toothache, acute enteritis, dysentery, urinary tract infection and cervical lymph node tuberculosis. Its assignment of the name Jin Wa Er to C. cernuum rather than to C. divaricatum is the origin of a persistent supply-chain ambiguity between the two species.

References

Zhang JP, Wang GW, Tian XH, Yang YX, Liu QX, Chen LP, Li HL, Zhang WD. The genus Carpesium: A review of its ethnopharmacology, phytochemistry and pharmacology . Journal of Ethnopharmacology (2015) [DOI]
Shi NN, Hou CC, Liu Y, Li KY, Mi SD, Tong BL, Zhang ML. Chemical constituents of plants from the genus Carpesium . Heterocyclic Communications (2022) [DOI]
Kim DK, Baek NI, Choi SU, Lee CO, Lee KR, Zee OP. Four New Cytotoxic Germacranolides from Carpesium divaricatum . Journal of Natural Products (1997) [DOI]
Zhang T, Si JG, Zhang QB, Ding G, Zou ZM. New Highly Oxygenated Germacranolides from Carpesium divaricatum and their Cytotoxic Activity . Scientific Reports (2016) [DOI]
Zhang T, Zhang H, Lin C, Fu L, Zou Z. New 11-Methoxymethylgermacranolides from the Whole Plant of Carpesium divaricatum . Molecules (2022) [DOI]
Xie WD, Wang XR, Ma LS, Li X, Row KH. Sesquiterpenoids from Carpesium divaricatum and their cytotoxic activity . Fitoterapia (2012) [DOI]
Malarz J, Galanty A, Stojakowska A. Chemical Composition and Cytotoxic Activity of Extracts from Carpesium divaricatum: In Vitro- versus Field-Grown Plants . Plants (2022) [DOI]

Carpesium divaricatum

Traditionally used for