Giant blazingstar

Other Names

Bartonia laevicaulisBartonia laevicaulis Douglas ex Hook.beautiful blazingstarblazing starblazing-star mentzeliaevening stargiant blazing starHesperaster laevicaulis (Douglas) CockerellMentzelia acuminata (Rydb.) Tidestr.Mentzelia laevicaulisMentzelia laevicaulis (Douglas ex Hook.) Torr. & A. GrayMentzelia laevicaulis var. acuminata (Rydb.) A. Nelson & J.F. Macbr.Mentzelia laevicaulis var. laevicaulisnorthern blazing starNuttallia acuminata Rydb.Nuttallia laevicaulis (Douglas ex Hook.) Greenesmooth stem blazing starsmoothstem blazingstarstickleafTouterea laevicaulis (Douglas ex Hook.) Rydb.

Synopsis

Giant Blazingstar (Liatris spicata): A Comprehensive Reference

1. Identity: Botanical Name, Natural Source, and Common Forms

1.1 Taxonomy and Nomenclature

Liatris spicata (L.) Willd. — commonly called the dense blazingstar, prairie feather, gayfeather, or button snakewort — is a herbaceous perennial flowering plant in the family Asteraceae. The epithet spicata refers to the plant's characteristic spike-like inflorescence. Liatris belongs to the aster family, with each flower head having only fluffy disk flowers (resembling "blazing stars") and no ray flowers. The feathery flower heads of liatris give rise to another common name of gayfeather. Additional synonyms include Lacinaria spicata (L.) Kuntze, used in some older botanical literature.

The term "giant blazingstar" is occasionally applied to particularly robust specimens or cultivars of L. spicata, but it is also sometimes used loosely within the broader Liatris genus to distinguish the taller-growing L. spicata from shorter congeners. The name "button snakeroot" and "colic root" are encountered in both historical eclectic medical writing and folk usage.

1.2 Natural Distribution and Morphology

Liatris spicata is native to eastern North America where it grows in moist prairies and meadows. The natural range of Liatris spicata (L.) Willd. (Asteraceae) is the eastern United States and Canada, east of the Mississippi River, from the south along the Gulf of Mexico including southern Alabama and northern Florida areas, north to Ontario and Quebec. This plant is hardy in zones 5 through 10 and found growing in New Jersey and west to Illinois and Michigan, and south to Florida and Louisiana.

Known as Dense Blazing Star or Gayfeather, it is an erect, slender, long-lived perennial lasting often as long as 20 years. Liatris spicata is a member of the Asteraceae Family. This plant grows from an underground corm supporting a tall stem that can grow from 2 to 5 feet tall, ending in an elongated spike of closely placed, stemless, rose-purple flower heads (more rarely seen are white flowers). The flowers bloom from top to bottom, beginning in July and lasting into September. At the bottom of the stem, narrow, grass-like, green leaves alternate up the stem, growing shorter as they near the top blooming spike.

The plant has corms with shallow fibrous roots and can produce new colonies from its corms, though it most often propagates by seed. This underground corm is the plant part most commonly used in herbal preparations.

1.3 Common Forms and Preparations

The root (corm) is the primary part used medicinally. The roots are the medicinal parts; they are all tuberous, with fibers, and have a hot, somewhat bitter taste, with considerable acrimony, and an agreeable, turpentine odor. They appear to contain a resinous substance, volatile oil, and a bitter principle. Their virtues are extracted by alcohol, and partially by hot water in infusion. Preparations encountered in historical and contemporary contexts include:

Decoction: Native Americans first utilized the plant as a decoction for backache, limb pains, as a diuretic, expectorant, and dropsy, as well as heart medicine. The 19th-century Eclectic Physicians recorded decoctions taken at specific doses (see Section 6).
Infusion: An aqueous infusion of the root or leaves has historically been employed for sore throat (gargled) and for kidney conditions.
Tincture / Fluid Extract: Cherokee practitioners used the plant as a tonic, and tincture applied to pains; the root was the plant part used. Alcoholic tinctures remain the most common commercial preparation today.
Homeopathic mother tincture: The tincture used in homeopathic preparations is prepared from fresh powdered roots.
Dried herb / potpourri: The plant is used for a sore throat by gargling an infusion, as an herbal insect repellent, and in potpourri.
Topical application: Mashed or poulticed root material was applied directly to snake bites and wounds in Native American practice.

2. Traditional and Historical Use

2.1 Native American Ethnobotany

Liatris spicata was historically used medicinally by Native Americans for its carminative, diuretic, stimulant, sudorific, and expectorant properties. In addition to these uses, the Cherokee used the plant as an analgesic for pain in the back and limbs. The Menominee used it for heart issues.

The root of the plant is the part most often used. Native Americans also used the plant to treat swelling, abdominal pain and spasms/colic, and snake bites. Native Americans first utilized the plant as a decoction for backache, limb pains, as a diuretic, expectorant, and dropsy, as well as heart medicine. The leaves and root are used today to treat sore throats, gonorrhoea, and diseases of the kidney.

Ethnobotanist Daniel Moerman's comprehensive 1998 work Native American Ethnobotany — cited repeatedly in medicinal plant literature — records L. spicata preparations across multiple tribal traditions. The Cherokee used a tonic and tincture specifically on pain, targeting the root. Some species of Liatris were used by Native Americans in herbal medicines. Their roots were commonly used to relieve headaches, sore throats, and pain from arthritis. Some tribal groups used Liatris seeds as a food source, while others used the plant's leaves to treat upset stomachs.

2.2 19th-Century Eclectic and Folk Medicine

Liatris spicata held a recognized place in 19th-century American Eclectic medicine, a formal tradition that incorporated indigenous North American plants into structured medical practice. The plant appears in the authoritative King's American Dispensatory and in the writings of Finley Ellingwood.

The agent was described as having the properties, to a mild degree, of a bitter tonic. Preparations included: Extractum Liatris Fluidum (Fluid Extract of Liatris), at a dose from one-half dram to one dram; Specific Medicine Liatris, at a dose from ten to sixty minims; Infusion Liatris, at a dose from one to four drams.

The physiological action was described as that of a bitter tonic, said to act as an antispasmodic to spasm of the muscular structure of the intestines, relieving spasmodic colic. It was said to stimulate the kidneys and was used in dropsies. It may be used in the latter stages of fevers as an eliminant. Liatris was considered to stimulate the stomach mildly, and to be a tonic and antispasmodic to the entire gastro-intestinal apparatus, relieving colic and soothing irritation, restoring healthy glandular action. Its eliminative action was considered quite marked, and it had been used in syphilis and scrofula.

The herb was also referenced by the influential British herbalist M. Grieve. These plants were described as diuretic, with tonic, stimulant, and emmenagogue properties. A decoction was considered very efficient in gonorrhoea, gleet, and nephritic diseases, in doses of from 2 to 4 fluid ounces, 3 or 4 times a day.

2.3 Common Name as "Colic Root"

The common name "Colic Root" reflects the plant's historical use in treating digestive ailments. The genus has been used across a number of closely related species for overlapping purposes. The carrot-flavored roots have inulin, a polysaccharide also found in Jerusalem artichoke roots. Inulin does not spike blood glucose levels when consumed and is thus a starch edible by diabetics. While some stems were used as a famine food, other parts of the plant were used medicinally, often to treat heart ailments, which makes sense as the species contains some coumarin.

3. Key Chemical Constituents and Active Compounds

Research-grade phytochemical analysis has confirmed a substantial diversity of secondary metabolites across different plant parts of L. spicata. The constituent profile varies by plant part (roots/corms, aerial parts/leaves, essential oil of aerial parts). No single authoritative review monograph exists for this species in comparison to more commercially prominent herbs; data are distributed across individual studies cited below.

3.1 Corms (Underground Storage Organs)

Investigation of the ethanol extract of the corms of Liatris spicata (L.) Willd led to the isolation of two sterols: stigmasterol and its 3-O-glucoside, a triterpene: obtusifoliyl acetate, two benzofurans: euparin and 6-hydroxy-3-methoxytremetone, three phenolic acids: protocatechuic, vanillic, and ferulic acid, and a sesquiterpene lactone igalan. The structures of the isolated compounds were established on the basis of physicochemical properties and spectral analysis (IR, EI/MS, ¹H NMR and ¹³C NMR).

An early 19th-century chemical analysis of the roots of L. spicata by W.F. Henry (1892) documented: 0.09 per cent of volatile oil, about 4.5 per cent of resin, 2.3 per cent of a caoutchouc-like body, 16 per cent of inulin, also mucilage, glucose, etc., but no glucosid nor alkaloid. The high inulin content (16%) is consistent with its membership in the Asteraceae family.

3.2 Aerial Parts and Leaves

The root contains flavonoid glycosides: quercetin 3-glucoside, quercetin 3-rutinoside, and quercetin 3-glucoside-7-rhamnoside. Leaf major volatiles include α-pinene, mesityl oxide, β-pinene, myrcene, 2,4-heptadienal, β-caryophyllene, germacrene D, and caryophyllene oxide. From the aerial parts, the guaianolide sesquiterpenoid spicatin has been characterized. From corms: sterols (stigmasterol and its 3-O-glucoside), a triterpene (obtusifoliyl acetate), benzofurans (euparin and 6-hydroxy-3-methoxytremetone), phenolic acids (protocatechuic, vanillic, and ferulic acid), and the sesquiterpene lactone igalan.

3.3 Essential Oil (Volatile Fraction)

A study presenting the essential oil compositions of seven aromatic medicinal plants used by Native Americans noted that the essential oil composition of L. spicata was being reported for the first time. The research, conducted via hydrodistillation with gas chromatographic analysis, found:

The major components of the aerial parts essential oil were germacrene D (23.7%), myrcene (13.7%), α-pinene (8.1%), and caryophyllene oxide (5.9%). Apparently, there had been no previous reports on the essential oil composition of L. spicata. Germacrene D was the major component in L. spicata (24%).

3.4 Sesquiterpene Lactones

The Cherokee used the plant as an analgesic for backache and limb pains. The guaianolide sesquiterpenoid spicatin has been isolated from the chloroform extract of L. spicata. Spicatin belongs to the guaianolide subclass of sesquiterpene lactones — a chemically well-characterized compound class found across the Asteraceae family and associated with a range of pharmacological activities.

To counter excessive grazing, the plant produces sesquiterpene lactones, secondary metabolites that act as chemical defenses against herbivores in the Asteraceae family by deterring feeding through toxicity or bitterness.

3.5 Coumarins

One major component of Liatris spicata is coumarin (1,2-benzopyrone, C₉H₆O₂). Coumarin has an anti-clotting effect on the blood and ingestion may prevent clotting when there is a cut. The plant has an agreeable odour, due to the presence of coumarins. Note that the coumarin content of L. spicata leaves is distinct from the potent synthetic anticoagulant drugs (e.g., warfarin) that are pharmacological derivatives of coumarin; while coumarin itself is not an anticoagulant, its 3-alkyl-4-hydroxy derivatives, such as the fungal metabolite dicoumarol, inhibit synthesis of vitamin K, a key component in blood clotting.

3.6 Summary Table of Key Constituents by Plant Part

Corms/roots: Inulin (~16%), sterols (stigmasterol, stigmasterol-3-O-glucoside), triterpene (obtusifoliyl acetate), benzofurans (euparin, 6-hydroxy-3-methoxytremetone), phenolic acids (protocatechuic, vanillic, ferulic), sesquiterpene lactone (igalan), resin (~4.5%), volatile oil (~0.09%), mucilage, glucose.
Leaves/aerial parts (non-volatile): Flavonoid glycosides (quercetin 3-glucoside, quercetin 3-rutinoside, quercetin 3-glucoside-7-rhamnoside), coumarins, guaianolide sesquiterpenoid (spicatin).
Essential oil (aerial parts): Germacrene D (23.7%), myrcene (13.7%), α-pinene (8.1%), caryophyllene oxide (5.9%), β-caryophyllene, mesityl oxide, β-pinene, 2,4-heptadienal.

4. Scientific Evidence by Area of Use

Important caveat on evidence quality: There does not appear to be any current research on possible medicinal uses of Liatris spicata specifically. Most of what follows documents preclinical (in vitro or animal) findings or older observations. No randomized controlled trials, cohort studies, or systematic reviews of clinical outcomes in humans have been identified for this species. All findings below are characterized according to their actual level of evidence.

4.1 Cytotoxic / Potential Anticancer Activity (In Vitro Only)

The most substantive published pharmacological finding for L. spicata specifically involves in vitro cytotoxicity. The ethanol extract and its isolated compounds evidenced cytotoxic activities against human liver cancer cell line (HepG2), where igalan showed the highest potency (3.83 ± 0.043 µg/mL), its effect was comparable to that of the standard drug doxorubicin® (3.73 ± 0.036 µg/mL). This finding, while notable, is strictly in vitro and cannot be extrapolated to clinical anticancer efficacy; no animal or human studies have been reported to confirm these preliminary cell-line results.

Earlier work on the broader Liatris genus examined antitumor properties. Herz and Sharma (1976) characterized pycnolide, a seco-germacradienolide from Liatris pycnostachya, and other antitumor constituents of Liatris species. A landmark study by Kupchan and colleagues isolated liatrin — "a novel antileukemic sesquiterpene lactone" — from the related species Liatris chapmanii (1971, 1973). These studies concern related but distinct species; their findings cannot be directly applied to L. spicata.

Evidence strength: Weak; in vitro only. No clinical data exist.

4.2 Antimicrobial Activity (Preliminary)

Some studies suggest that extracts from the plant may inhibit the growth of specific bacteria and fungi, which could align with traditional uses of the plant for treating infections or wounds. However, more research is needed to fully understand its effectiveness as an antimicrobial agent. The leaves and root are reported to have antibacterial and antidiuretic properties, and possibly anti-cancer properties, caused mainly by coumarin.

Evidence strength: Preliminary and unspecified. No peer-reviewed study on L. spicata antimicrobial activity with full methodology has been identified in the literature reviewed. Claims are largely extrapolated from constituent chemistry (coumarins, flavonoids).

4.3 Antioxidant / Flavonoid-Related Activity (Theoretical)

The presence of flavonoids and other phenolic compounds in Liatris spicata suggests the plant may have antioxidant properties, helping to neutralize harmful free radicals in the body. Antioxidants play a significant role in reducing oxidative stress, which is linked to aging and various chronic diseases. This inference is based on the plant's known content of quercetin glycosides and ferulic acid, compounds with well-documented antioxidant capacity in other contexts. No direct antioxidant assay data specifically from L. spicata extracts could be verified in peer-reviewed sources.

Evidence strength: Theoretical, based on constituent class; no direct bioassay data for this species confirmed.

4.4 Diuretic and Renal Effects (Traditional Use, No Clinical Data)

In folk medicine, Liatris spicata was often used as a diuretic, helping to promote urination and support kidney function. While this use has not been extensively studied in modern scientific literature, it aligns with the historical use of many Liatris species in traditional herbal medicine. In the 19th-century Eclectic tradition, the kidneys were a primary organ target: it stimulated the kidneys and had been used in dropsies (edema).

Evidence strength: Traditional use only; no modern pharmacological or clinical studies identified.

4.5 Digestive and Antispasmodic Use (Historical/Traditional)

Liatris was considered to stimulate the stomach mildly, and to act as a tonic and antispasmodic to the entire gastro-intestinal apparatus, relieving colic and soothing irritation, after fevers and other acute prostrating diseases, restoring healthy glandular action.

Evidence strength: Historical report from eclectic medical literature. No modern mechanistic or clinical data identified.

4.6 Essential Oil Composition (Descriptive Research)

A peer-reviewed study published in the journal Plants (MDPI, 2021) documented the essential oil composition of L. spicata aerial parts for the first time using GC analysis. The essential oil compositions of Liatris spicata and three other medicinal plants were reported for the first time. Additionally, the enantiomeric distributions of several terpenoid components were determined. The chemical compositions presented add to the knowledge of the phytochemistry of the medicinal plants. No bioactivity testing was reported for the L. spicata essential oil in this study.

Evidence strength: Descriptive phytochemistry; no pharmacological or clinical outcome data.

5. Body Systems and Health Areas Associated with Liatris spicata

Based on traditional use and phytochemical evidence, the following body systems are associated with this plant:

Urinary / Renal System: Diuretic use is among the most consistently recorded across Native American traditions and Eclectic medicine. Plains tribes used related Liatris species to make a tea that was used for kidney, bladder, and menstrual problems, water retention, gonorrhea, colic, sore throat, and laryngitis.
Gastrointestinal System: Antispasmodic use for colic, abdominal pain, and digestive complaints is heavily documented in both Native American ethnobotany and 19th-century practice.
Cardiovascular System: The Menominee used it for heart issues. Eclectic practitioners described it as a vascular stimulant used for dropsy (edema).
Musculoskeletal System: The Cherokee used the plant as an analgesic for backache and limb pains.
Respiratory System: Historically, Native American tribes used Liatris spicata for treating respiratory issues and sore throats.
Reproductive / Genitourinary System: Eclectic physicians employed it for gonorrhea and conditions of the genitourinary tract; these plants were described as diuretic, with tonic, stimulant, and emmenagogue properties, and a decoction was said to be very efficient in gonorrhoea, gleet, and nephritic diseases.
Skin / Wound Care: Topical use on wounds and snake bites is documented in ethnobotanical sources.

6. Dosage Forms and Reported Dosages

The following dosages are drawn exclusively from historical medical and herbal literature; no modern clinical dose-ranging studies exist for this plant. These figures should be understood as historical records, not clinical recommendations.

Fluid Extract of Liatris (Extractum Liatris Fluidum): Dose: from one-half dram to one dram.
Specific Medicine Liatris: Dose: from ten to sixty minims.
Infusion of Liatris: Dose: from one to four drams.
Decoction (M. Grieve / King's Dispensatory tradition): A decoction was used in doses of from 2 to 4 fluid ounces, 3 or 4 times a day.
Homeopathic tincture (contemporary retail products): Commercial homeopathic preparations cite 15 drops of mother tincture in half a cup of water twice daily, or 10 drops in half a cup of water three times daily, though these figures come from retail product labeling rather than controlled studies.

No dosage data derived from modern clinical trials, pharmacokinetic studies, or regulatory agency assessments of L. spicata preparations have been identified.

7. Safety Considerations and Interactions

7.1 Coumarin Content and Anticoagulant Considerations

The most substantiated safety note for L. spicata concerns its coumarin content. There is some research to show that gayfeather leaves contain low levels of coumarin, which under certain circumstances can act as an anticoagulant, and in severe cases can cause internal bleeding. Caution is suggested when ingesting blazing star, as one major component is coumarin (1,2-benzopyrone, C₉H₆O₂). Coumarin has an anti-clotting effect on the blood and ingestion may prevent clotting when there is a cut.

It is important to note the distinction in coumarin pharmacology. Coumarin is a colorless crystalline solid with a sweet odor resembling the scent of vanilla and a bitter taste. It is found in many plants, where it may serve as a chemical defense against predators. While coumarin itself is not an anticoagulant, its 3-alkyl-4-hydroxy derivatives, such as the fungal metabolite dicoumarol, inhibit synthesis of vitamin K, a key component in blood clotting. The coumarins present in L. spicata are not identical to pharmaceutical anticoagulants like warfarin; nevertheless, caution is warranted in individuals already using anticoagulant medications, given the potential for additive effects.

Numerous coumarins possess several biological activities such as anti-inflammatory, anti-ulcers, anti-tumour, anti-microbial, and anti-coagulant activity. Six coumarins from plant sources have shown varying levels and types of toxicity ranging from inhibiting blood clotting as anticoagulants, to cytotoxic effects, causing hyperventilation, tremor, and photophobia, pulmonary haemorrhage, carcinogenic activity, severe neurotoxicity, and hepato- and phototoxicity. Whether the specific coumarins in L. spicata contribute meaningfully to these effects at usual herbal doses has not been formally investigated.

7.2 Asteraceae / Compositae Allergy

Liatris spicata belongs to the family Asteraceae (Compositae). Individuals with known allergies to other Asteraceae members (e.g., ragweed, chrysanthemums, chamomile, echinacea) may theoretically exhibit cross-reactivity, though no specific case reports for L. spicata have been identified in the reviewed literature.

7.3 Lack of Formal Toxicity Data

Although there are no records of toxicity for this plant in available databases, one record notes that the leaves contain coumarins. No formal LD50 studies, subchronic toxicity studies, genotoxicity assays, or human safety trials have been reported for L. spicata preparations. The absence of toxicity reports does not constitute evidence of safety, particularly at higher or prolonged doses.

7.4 Coumarin and Drug Interactions (Contextual)

Because the plant contains coumarins, it is relevant to note the broader pharmacological interaction profile of this compound class. Many drugs alter the anticoagulant effect of oral coumarins. It is essential that physicians be aware of interactions leading to increased or decreased anticoagulation or erratic control. Interacting drugs can be classified as influencing the pharmacodynamics (pharmacological actions) or the pharmacokinetics of oral coumarin anticoagulants. This contextual profile becomes particularly relevant in individuals taking anticoagulant medications, antiplatelet agents, or NSAIDs alongside L. spicata-containing preparations.

7.5 Pregnancy and Lactation

These plants have tonic, stimulant, and emmenagogue properties. Emmenagogue activity (stimulating or increasing menstrual flow) as described in historical texts is a recognized concern in pregnancy. No modern reproductive toxicity data exist. Historical Eclectic descriptions of emmenagogue action suggest that use during pregnancy is inadvisable without medical evaluation.

7.6 Inulin Content

The roots have inulin, a polysaccharide also found in Jerusalem artichoke roots. It does not spike blood glucose levels when consumed and is thus a starch edible by diabetics. However, large quantities of inulin-rich preparations may cause flatulence or gastrointestinal bloating in susceptible individuals, as is observed with other inulin-containing herbs and foods.

8. Current Status and Research Gaps

Current research on Liatris spicata is still relatively limited. The body of evidence for this plant as a dietary supplement or medicinal agent remains at an early preclinical stage. The sole identified in vitro pharmacological study of significance demonstrated cytotoxic activity of the sesquiterpene lactone igalan against HepG2 liver cancer cells, with potency comparable to doxorubicin in cell culture, but this has not been replicated in animal models or human trials. Phytochemical profiling — particularly of the essential oil and corm constituents — has advanced in recent years, providing a chemical foundation for future mechanistic work.

No entry for Liatris spicata exists in the NIH Office of Dietary Supplements fact sheets, the WHO Monographs on Selected Medicinal Plants, ESCOP Monographs, or the German Commission E monographs. The absence of regulatory monograph recognition reflects the limited clinical evidence base rather than any established safety concern. L. spicata is not subject to any international regulatory restriction on sale as a botanical ingredient in the United States or European Union as of the available information.

The plant remains primarily of ornamental and ecological importance, with medicinal use predominantly confined to the homeopathic tradition (where it appears as a mother tincture preparation) and to niche herbal suppliers. The broader genus Liatris continues to attract phytochemical interest because of the sesquiterpene lactone diversity it presents, and future studies on L. spicata specifically may build on the igalan cytotoxicity finding and the essential oil characterization.

References

Health Conditions

Health conditions that Giant blazingstar may help support.

No conditions available.

Body Systems

Body systems that Giant blazingstar may help support.

No body systems available.