Warrior's Plume

What Is Warrior’s Plume?

Warrior’s plume, also called Indian warrior, is a red-flowered lousewort of the broomrape family, used in herbal teas and smoking blends as a gentle muscle relaxant.

Pedicularis densiflora is native to California and Oregon, where it grows in chaparral, oak woodland and low-elevation forest ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}. It is a partial root parasite: it can live on its own, but it attaches to the roots of nearby plants when it can, often manzanitas ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}.

Nothing has been measured in the plant itself. Research on other louseworts has focused on their phenylpropanoid glycosides, such as verbascoside and martynoside, and has found antioxidant and anti-fatigue effects in the laboratory and in animals ^{3,7,8Reference 3Li MX et al. · 2014Phytochemistry and pharmacology of the genus Pedicularis used in traditional Chinese medicineView study →Reference 7Liao F et al. · 1999In vitroRetardation of skeletal muscle fatigue by the two phenylpropanoid glycosides verbascoside and martynoside from Pedicularis plicata — in vitroView study →Reference 8Zhu M et al. · 2016AnimalCentral anti-fatigue activity of verbascoside — rat in vivoView study →}.

How Is Warrior’s Plume Used?

• Tea — an infusion of the dried leaf and flowering tops.
• Smoking blends — the dried leaf and flower, usually mixed with other herbs.

It is used in small amounts, as a mild relaxant, and usually in blends rather than alone.

Traditional Uses

Western North American Herbalism

The leaf and flowering tops are taken as a tea or smoked. The genus Pedicularis has a folk reputation as a gentle skeletal-muscle relaxant, and warrior’s plume is one of the species used for it.

It is taken for muscular tension and physical unwinding, with a mild calming effect alongside. It is a gentle remedy, usually blended with other herbs.

Indications

• Muscle tension [leaf and flower; Western herbalism] ⚠Caution: No study in any Pedicularis species has tested a muscle-relaxant or sedative effect. The genus research points instead to anti-fatigue and endurance effects in animals ^7,8,10.
• Nervous tension and unwinding [leaf and flower, as tea or smoked; Western herbalism]

Botany

Warrior’s plume is a perennial herb in the broomrape family (Orobanchaceae), growing to about 60 cm ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}. Its stems are stout, and green or sometimes reddish or magenta ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}.

The leaves are finely divided and fern-like ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}. The flowers are deep red to bright pink, with toothed petals, and are packed into long spikes ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}. It flowers in winter and spring ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}.

Like other louseworts, it is a partial root parasite. It can live without a host, but it will attach to the roots of other plants when it has the chance, often members of the heath family such as manzanita ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}.

Distribution

Warrior’s plume is native to California and Oregon ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}. It grows at low elevations in chaparral, foothill woodland and yellow pine forest, on dry sites ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}.

Growing Conditions

Cultivation snapshot for Warrior's Plume

LifeperennialZoneUSDA 8–10

Host plantsa partial root parasite. It can grow without a host, but attaches to the roots of nearby plants when it can, often manzanita and other members of the heath family ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}.

Light and waterfull sun to part shade, in dry places, with very low to low water ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}.

Soiladaptable, from fast- to slow-draining ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}.

Availabilityrarely sold in nurseries ^{20Reference 20California Native Plant SocietyPedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities)View study →}.

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Pharmacology & Research

No pharmacological study of Pedicularis densiflora has been published. The research below comes from other louseworts, mostly Asian species used in Chinese medicine, and from the genus’s main constituents ^{3Reference 3Li MX et al. · 2014Phytochemistry and pharmacology of the genus Pedicularis used in traditional Chinese medicineView study →}.

Those constituents are the phenylpropanoid glycosides, above all verbascoside and martynoside, and the iridoid glycosides ^{3Reference 3Li MX et al. · 2014Phytochemistry and pharmacology of the genus Pedicularis used in traditional Chinese medicineView study →}. All of the evidence is preclinical: cell-free assays, cell lines and rodents.

The most consistent findings are antioxidant activity and an anti-fatigue effect on muscle and endurance ^{4,5,7,8,9Reference 4Wang P et al. · 1996In vitroScavenging effects of phenylpropanoid glycosides from Pedicularis on superoxide anion and hydroxyl radical by the spin trapping method — in vitroView study →Reference 5Li J et al. · 1997In vitroAntioxidative and chelating activities of phenylpropanoid glycosides from Pedicularis striata — in vitroView study →Reference 7Liao F et al. · 1999In vitroRetardation of skeletal muscle fatigue by the two phenylpropanoid glycosides verbascoside and martynoside from Pedicularis plicata — in vitroView study →Reference 8Zhu M et al. · 2016AnimalCentral anti-fatigue activity of verbascoside — rat in vivoView study →Reference 9Zhu M et al. · 2010AnimalAnti-sports anaemia effects of verbascoside and martynoside in mice — animal modelView study →}. No study has tested the muscle-relaxant, antispasmodic or sedative use.

1. Antioxidant

Antioxidant activity is the most replicated finding in the genus. Six phenylpropanoid glycosides from P. alashanica and P. striata, including verbascoside, martynoside and leucosceptoside A, scavenged superoxide and hydroxyl radicals in spin-trapping assays. Those with more phenolic hydroxyl groups were stronger ^{4Reference 4Wang P et al. · 1996In vitroScavenging effects of phenylpropanoid glycosides from Pedicularis on superoxide anion and hydroxyl radical by the spin trapping method — in vitroView study →}.

Verbascoside and isoverbascoside from P. striata inhibited iron-dependent lipid peroxidation and bound iron, with isoverbascoside the stronger iron binder ^{5Reference 5Li J et al. · 1997In vitroAntioxidative and chelating activities of phenylpropanoid glycosides from Pedicularis striata — in vitroView study →}.

Methanol extracts of P. sibthorpii and P. wilhelmsiana scavenged DPPH radicals ^{6Reference 6Khodaie L et al. · 2012In vitroAntioxidant and antimicrobial activity of Pedicularis sibthorpii and Pedicularis wilhelmsiana — in vitroView study →}, and extracts of P. decora reduced markers of oxidative injury in mice ^{13Reference 13Yang J et al. · 2002AnimalEffects of Pedicularis decora extract on anti-oxidation injury in mice — animal modelView study →}.

Gap: all of this is in vitro or in rodents, on species other than P. densiflora, using extracts or isolated compounds rather than a tea or smoking blend.

2. Anti-Fatigue & Muscle Endurance

Several studies report an anti-fatigue effect. In electrically stimulated toad calf muscle, verbascoside (20 µM) from P. plicata significantly resisted fatigue, while martynoside (80 µM) helped only slightly. The authors linked the effect to their antioxidant activity ^{7Reference 7Liao F et al. · 1999In vitroRetardation of skeletal muscle fatigue by the two phenylpropanoid glycosides verbascoside and martynoside from Pedicularis plicata — in vitroView study →}.

In rats, verbascoside at 10 mg/kg lengthened treadmill running time to exhaustion as effectively as caffeine. It suppressed the rise in serotonin synthesis in the brain that comes with exercise ^{8Reference 8Zhu M et al. · 2016AnimalCentral anti-fatigue activity of verbascoside — rat in vivoView study →}.

In mice given intensive swimming exercise for five weeks, verbascoside and martynoside from P. dolichocymba (10 mg/kg a day) protected red blood cells from the damage of “sports anaemia” ^{9Reference 9Zhu M et al. · 2010AnimalAnti-sports anaemia effects of verbascoside and martynoside in mice — animal modelView study →}.

Phenylpropanoid-rich fractions of P. densispica lengthened swimming and low-oxygen endurance times in mice ^{10Reference 10Chu H et al. · 2017AnimalContent determination of phenylpropanoids and enhancing exercise ability of effective fractions in Pedicularis densispica — animal modelView study →}. Phenylethanoid glycosides of P. kansuensis lengthened swimming time in mice exposed to simulated high altitude ^{12Reference 12Yu L et al. · 2020AnimalAntioxidant activity and potential ameliorating effective ingredients for high altitude-induced fatigue from Pedicularis kansuensis — animal modelView study →}.

Gap: every study used isolated constituents or fractions from other species in exercise models; none tested P. densiflora, and none tested a muscle-relaxant or antispasmodic action.

3. Neuroprotective

Phenylethanoid glycosides of P. muscicola, given by mouth for a week, protected rats against memory loss after three days at a simulated altitude of 7,500 m. They lowered oxidative stress, nerve-cell damage and the cell-death marker caspase-3 in the hippocampus, and reduced errors in a radial-maze test ^{11Reference 11Zhou B et al. · 2016AnimalPhenylethanoid glycosides of Pedicularis muscicola ameliorate high altitude-induced memory impairment — rat in vivoView study →}.

Reviews of verbascoside and aucubin list neuroprotective activity among their effects ^{1,2Reference 1Alipieva K et al. · 2014ReviewVerbascoside — a review of its occurrence, (bio)synthesis and pharmacological significanceView study →Reference 2Zeng X et al. · 2020ReviewA review of the pharmacology and toxicology of aucubinView study →}.

Gap: a single animal model of high-altitude hypoxia, in another species, plus reviews of single constituents.

4. Hepatoprotective

In a study of compounds isolated from the whole plant of P. rex, four protected mouse liver cells from paracetamol damage in vitro ^{14Reference 14Yang FY et al. · 2025In vitroChemical constituents of Pedicularis rex and their hepatoprotective activities — in vitroView study →}. A review of the genus lists liver protection among its documented activities ^{3Reference 3Li MX et al. · 2014Phytochemistry and pharmacology of the genus Pedicularis used in traditional Chinese medicineView study →}.

The iridoid aucubin has liver-protective, anti-inflammatory and anti-fibrotic effects in its own pharmacology review ^{2Reference 2Zeng X et al. · 2020ReviewA review of the pharmacology and toxicology of aucubinView study →}.

Gap: the evidence is from constituents and other species, with no whole-plant liver study.

5. Anti-Inflammatory

Anti-inflammatory activity is inferred from the constituents. Verbascoside is documented as anti-inflammatory alongside its antioxidant and wound-healing actions ^{1Reference 1Alipieva K et al. · 2014ReviewVerbascoside — a review of its occurrence, (bio)synthesis and pharmacological significanceView study →}, and aucubin has anti-inflammatory and anti-fibrotic effects ^{2Reference 2Zeng X et al. · 2020ReviewA review of the pharmacology and toxicology of aucubinView study →}.

Gap: no Pedicularis extract has been tested in an inflammation model.

6. Antimicrobial

A new neolignan glycoside, armaoside, and six known compounds from P. armata were tested against Bacillus subtilis, Escherichia coli and Staphylococcus aureus ^{15Reference 15Yuan CS et al. · 2007In vitroAntibacterial constituents from Pedicularis armata — in vitroView study →}. Methanol extracts of P. sibthorpii and P. wilhelmsiana were active against bacteria, chiefly the Gram-positive S. aureus and S. epidermidis, and showed no antifungal activity ^{6Reference 6Khodaie L et al. · 2012In vitroAntioxidant and antimicrobial activity of Pedicularis sibthorpii and Pedicularis wilhelmsiana — in vitroView study →}.

Gap: in vitro work on other species, with no potency comparison.

7. Cytotoxic (Anticancer)

Verbascoside from P. striata inhibited telomerase, shortened telomeres and halted the cell cycle in human gastric cancer cells at 17.8 µg/mL ^{16Reference 16Zhang F et al. · 2002In vitroIn vitro modulation of telomerase activity, telomere length and cell cycle in MKN45 cells by verbascoside — in vitroView study →}.

Several iridoids from P. uliginosa inhibited human kidney cancer cells more strongly than the drug vinblastine ^{17Reference 17Liu LF et al. · 2019In vitroIridoid derivatives with cytotoxic activity from Pedicularis uliginosa — in vitroView study →}.

An ethanol extract of the aerial parts of P. longiflora strengthened immune responses in diabetic rats, with an effective dose of 500 mg/kg ^{18Reference 18Yatoo MI et al. · 2018In vitroIn vitro and in vivo immunomodulatory potential of Pedicularis longiflora in alloxan-induced diabetes in rats — animal modelView study →}.

Gap: cell-line work on isolated compounds, with no animal tumour model for the genus and nothing on P. densiflora.

Mechanisms

The phenylpropanoid glycosides verbascoside and martynoside scavenge free radicals and bind iron ^{4,5Reference 4Wang P et al. · 1996In vitroScavenging effects of phenylpropanoid glycosides from Pedicularis on superoxide anion and hydroxyl radical by the spin trapping method — in vitroView study →Reference 5Li J et al. · 1997In vitroAntioxidative and chelating activities of phenylpropanoid glycosides from Pedicularis striata — in vitroView study →}. The anti-fatigue studies link their effect on muscle to this antioxidant action ^{7,9Reference 7Liao F et al. · 1999In vitroRetardation of skeletal muscle fatigue by the two phenylpropanoid glycosides verbascoside and martynoside from Pedicularis plicata — in vitroView study →Reference 9Zhu M et al. · 2010AnimalAnti-sports anaemia effects of verbascoside and martynoside in mice — animal modelView study →}. In rats, verbascoside also reduced the rise in brain serotonin synthesis during exercise ^{8Reference 8Zhu M et al. · 2016AnimalCentral anti-fatigue activity of verbascoside — rat in vivoView study →}.

The iridoid aucubin has been studied for anti-inflammatory and anti-fibrotic effects in its own right ^{2Reference 2Zeng X et al. · 2020ReviewA review of the pharmacology and toxicology of aucubinView study →}.

Clinical Trials

No clinical trial of warrior’s plume or any Pedicularis species has been registered.

Last checked: June 2026.

Phytochemistry

No constituent of Pedicularis densiflora has been measured. Across the genus, the main compounds are iridoid glycosides and phenylpropanoid glycosides, along with lignan glycosides, flavonoids and alkaloids ^{3Reference 3Li MX et al. · 2014Phytochemistry and pharmacology of the genus Pedicularis used in traditional Chinese medicineView study →}.

The phenylpropanoid glycosides isolated from Asian species include verbascoside, isoverbascoside, martynoside and leucosceptoside A ^{4,5Reference 4Wang P et al. · 1996In vitroScavenging effects of phenylpropanoid glycosides from Pedicularis on superoxide anion and hydroxyl radical by the spin trapping method — in vitroView study →Reference 5Li J et al. · 1997In vitroAntioxidative and chelating activities of phenylpropanoid glycosides from Pedicularis striata — in vitroView study →}. In P. densispica, six of them were measured, including salidroside, verbascoside and martynoside ^{10Reference 10Chu H et al. · 2017AnimalContent determination of phenylpropanoids and enhancing exercise ability of effective fractions in Pedicularis densispica — animal modelView study →}.

Louseworts can take up compounds from the plants they parasitise. Pedicularis semibarbata growing on lupines takes up their quinolizidine alkaloids, so a single population can contain both alkaloid-rich and alkaloid-free plants ^{19Reference 19Stermitz FR et al. · 1989Quinolizidine alkaloids obtained by Pedicularis semibarbata (Scrophulariaceae) from Lupinus fulcratus (Leguminosae) fail to influence the specialist herbivore Euphydryas editha (Lepidoptera) — field and chemical studyView study →}.

Findings for the Asian species should be read separately from warrior’s plume, whose own chemistry has not been studied ^{3Reference 3Li MX et al. · 2014Phytochemistry and pharmacology of the genus Pedicularis used in traditional Chinese medicineView study →}.

Constituent Summary

These are reported for the genus, not measured in P. densiflora.

Dosage

No human dose has been studied for any Pedicularis species. The doses below are those used in the laboratory and animal studies.

Traditional Dosage

Safety & Pregnancy

Warrior’s plume has no toxicology of its own and no reported side effects. Its main genus constituents have low reported toxicity. The one caution specific to louseworts is that they can take up compounds from the plants they grow on ^{19Reference 19Stermitz FR et al. · 1989Quinolizidine alkaloids obtained by Pedicularis semibarbata (Scrophulariaceae) from Lupinus fulcratus (Leguminosae) fail to influence the specialist herbivore Euphydryas editha (Lepidoptera) — field and chemical studyView study →}.

Full Safety & Interactions Detail

Toxicology. Warrior’s plume has no published toxicology and no reported side effects. Aucubin, one of the genus’s main constituents, is well tolerated in its review, with no serious adverse reactions reported ^{2Reference 2Zeng X et al. · 2020ReviewA review of the pharmacology and toxicology of aucubinView study →}.

Host plants. Louseworts are partial root parasites and can take up compounds from their hosts. Pedicularis semibarbata growing on lupines contains the lupines’ quinolizidine alkaloids ^{19Reference 19Stermitz FR et al. · 1989Quinolizidine alkaloids obtained by Pedicularis semibarbata (Scrophulariaceae) from Lupinus fulcratus (Leguminosae) fail to influence the specialist herbivore Euphydryas editha (Lepidoptera) — field and chemical studyView study →}. Material gathered beside toxic plants may carry their compounds, so use plants of known origin.

Smoking. Smoking any plant material irritates the airways.

Interactions. No drug-interaction study exists for warrior’s plume or the genus.

References

1. Alipieva K, et al. (2014). Verbascoside — a review of its occurrence, (bio)synthesis and pharmacological significance. Biotechnology Advances. https://pubmed.ncbi.nlm.nih.gov/25048704/
2. Zeng X, et al. (2020). A review of the pharmacology and toxicology of aucubin. Fitoterapia. https://pubmed.ncbi.nlm.nih.gov/31790767/
3. Li MX, et al. (2014). Phytochemistry and pharmacology of the genus Pedicularis used in traditional Chinese medicine. The American Journal of Chinese Medicine. https://pubmed.ncbi.nlm.nih.gov/25242078/
4. Wang P, et al. (1996). Scavenging effects of phenylpropanoid glycosides from Pedicularis on superoxide anion and hydroxyl radical by the spin trapping method — in vitro. Biochemical Pharmacology. https://pubmed.ncbi.nlm.nih.gov/8615906/
5. Li J, et al. (1997). Antioxidative and chelating activities of phenylpropanoid glycosides from Pedicularis striata — in vitro. Acta Pharmacologica Sinica. https://pubmed.ncbi.nlm.nih.gov/10072901/
6. Khodaie L, et al. (2012). Antioxidant and antimicrobial activity of Pedicularis sibthorpii and Pedicularis wilhelmsiana — in vitro. Advanced Pharmaceutical Bulletin. https://pubmed.ncbi.nlm.nih.gov/24312775/
7. Liao F, et al. (1999). Retardation of skeletal muscle fatigue by the two phenylpropanoid glycosides verbascoside and martynoside from Pedicularis plicata — in vitro. Phytotherapy Research. https://pubmed.ncbi.nlm.nih.gov/10548760/
8. Zhu M, et al. (2016). Central anti-fatigue activity of verbascoside — rat in vivo. Neuroscience Letters. https://pubmed.ncbi.nlm.nih.gov/26827721/
9. Zhu M, et al. (2010). Anti-sports anaemia effects of verbascoside and martynoside in mice — animal model. International Journal of Sports Medicine. https://pubmed.ncbi.nlm.nih.gov/20556696/
10. Chu H, et al. (2017). Content determination of phenylpropanoids and enhancing exercise ability of effective fractions in Pedicularis densispica — animal model. Pharmacognosy Magazine. https://pubmed.ncbi.nlm.nih.gov/28539713/
11. Zhou B, et al. (2016). Phenylethanoid glycosides of Pedicularis muscicola ameliorate high altitude-induced memory impairment — rat in vivo. Physiology & Behavior. https://pubmed.ncbi.nlm.nih.gov/26825251/
12. Yu L, et al. (2020). Antioxidant activity and potential ameliorating effective ingredients for high altitude-induced fatigue from Pedicularis kansuensis — animal model. Journal of Traditional Chinese Medicine. https://pubmed.ncbi.nlm.nih.gov/32227769/
13. Yang J, et al. (2002). Effects of Pedicularis decora extract on anti-oxidation injury in mice — animal model. Zhong Yao Cai. https://pubmed.ncbi.nlm.nih.gov/12583242/
14. Yang FY, Liu HQ, Wang FR, et al. (2025). Chemical constituents of Pedicularis rex and their hepatoprotective activities — in vitro. Natural Product Research. https://pubmed.ncbi.nlm.nih.gov/40285472/
15. Yuan CS, et al. (2007). Antibacterial constituents from Pedicularis armata — in vitro. Journal of Asian Natural Products Research. https://pubmed.ncbi.nlm.nih.gov/17943564/
16. Zhang F, et al. (2002). In vitro modulation of telomerase activity, telomere length and cell cycle in MKN45 cells by verbascoside — in vitro. Planta Medica. https://pubmed.ncbi.nlm.nih.gov/11859459/
17. Liu LF, et al. (2019). Iridoid derivatives with cytotoxic activity from Pedicularis uliginosa — in vitro. Chemistry & Biodiversity. https://pubmed.ncbi.nlm.nih.gov/30468024/
18. Yatoo MI, et al. (2018). In vitro and in vivo immunomodulatory potential of Pedicularis longiflora in alloxan-induced diabetes in rats — animal model. Biomedicine & Pharmacotherapy. https://pubmed.ncbi.nlm.nih.gov/29091887/
19. Stermitz FR, Belofsky GN, Ng D, Singer MC. (1989). Quinolizidine alkaloids obtained by Pedicularis semibarbata (Scrophulariaceae) from Lupinus fulcratus (Leguminosae) fail to influence the specialist herbivore Euphydryas editha (Lepidoptera) — field and chemical study. Journal of Chemical Ecology. https://pubmed.ncbi.nlm.nih.gov/24271594/
20. California Native Plant Society. Pedicularis densiflora (Warrior’s Plume) — Calscape species page (description, range and plant communities). https://calscape.org/Pedicularis-densiflora-(Warrior’s-Plume)

View all 20 references▾