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Musk milfoil

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Achillea erba-rotta

Family: Asteraceae Genus: Achillea Species: erba-rotta

Synonyms: Ptarmica erba-rotta

Musk milfoil
Musk milfoil

Western Herbalism Properties

Actions:
bittercarminativetonic

Botanical Description

Achillea erba-rotta, commonly known as musk milfoil or musk yarrow, is a small perennial herb in the family Asteraceae native to the European Alps, Apennines, Pyrenees, and Carpathians, where it grows in acidic alpine pastures, screes, and rocky outcrops between 1,500 and 3,000 metres elevation. The plant grows 5 to 25 centimetres tall from a slender creeping rhizome that forms loose mats. Leaves are basal and cauline, sessile, linear to narrowly oblanceolate, 2 to 6 centimetres long, simple and entire to weakly toothed (unlike the deeply pinnatisect leaves typical of most Achillea), bright green, somewhat fleshy, and aromatic with a musky resinous scent when crushed. Stems are erect, simple, slightly hairy, bearing a compact terminal corymb of three to twelve flower heads. Each capitulum is about 8 to 12 millimetres across, with five to nine white ray florets surrounding a small disc of cream-yellow tubular florets. The phyllaries are oblong, with dark brown to blackish scarious margins.

Native Region: Austria, France, Italy, Switzerland

Active Constituents

cis- and trans-Thujone

Monoterpene ketone

Concentration: Often a dominant essential-oil component (cis-thujone up to ~48%, trans-thujone up to ~34% in some accessions)

A characteristic and highly variable monoterpene of the essential oil contributing to the bitter, aromatic character used in digestive liqueurs. Thujone is a GABA-A antagonist and is neurotoxic/convulsant at high doses, so intake should be moderate.

Camphor

Monoterpene ketone

Concentration: Major EO component (up to ~37%)

Aromatic monoterpene contributing to the pungent scent; mild rubefacient and antimicrobial properties.

1,8-Cineole (eucalyptol)

Monoterpene oxide

Concentration: Major EO component (roughly 5-23%)

Contributes to the fresh, camphoraceous aroma; has documented anti-inflammatory, mucolytic and antimicrobial activity.

p-Cymene

Aromatic monoterpene

Concentration: Minor EO component (roughly 2-5%)

Contributes to aroma and to antioxidant and antimicrobial activity of the volatile oil.

Chamazulene

Sesquiterpene (azulene)

Concentration: Present in some accessions (reported for the first time in this species)

A blue anti-inflammatory sesquiterpene formed from matricin during distillation, associated with the soothing and antiphlogistic properties attributed to Achillea oils.

Apigenin-7-O-glucoside and other flavonoids

Flavone glycosides

Concentration: Major phenolic constituents of aerial parts (7-O-beta-glucosyl apigenin most abundant)

Antioxidant and anti-inflammatory flavonoids that dominate the non-volatile phenolic fraction and contribute to the plant's radical-scavenging activity.

Dicaffeoylquinic acids and chlorogenic acid

Caffeoylquinic (phenolic) acids

Concentration: Prominent phenolic acids (3,4-, 4,5- and 3,5-dicaffeoylquinic acids; 5-O-caffeoylquinic acid)

Strong antioxidant phenolic acids that contribute to the antioxidant and gastroprotective activity demonstrated for aqueous infusions of the herb.

⚠ Drug Interactions

Antiepileptic drugs / seizure-threshold-lowering agents

Minor Evidence: Theoretical

The essential oil can be rich in thujone, a GABA-A receptor antagonist that lowers seizure threshold at high doses; concentrated oil or excessive liqueur intake could theoretically oppose anticonvulsant therapy.

Clinical note: Avoid concentrated essential oil and limit thujone-containing liqueurs in people with epilepsy; ordinary culinary/infusion use has no documented clinical interactions.

Preparation Methods

Herbal infusion (digestive tea)

Parts: flowering aerial parts, flower

Dried flowering tops infused in hot water and drunk after meals as a traditional Alpine bitter digestive; this aqueous infusion is the preparation with preclinical support for pancreatic-lipase and gastroprotective effects.

Bitter digestive liqueur / amaro

Parts: flowering aerial parts

The aromatic herb (locally called 'iva') is a key botanical in Alpine digestive liqueurs and amari (for example Amaro Braulio of Bormio and 'Taneda'). Because the oil can contain thujone, such products should be consumed in moderation.

Aromatic culinary/flavouring use

Parts: flowering aerial parts, leaf

Used in small amounts to flavour spirits and foods for its musky, resinous aroma. Avoid ingestion of the concentrated essential oil owing to its thujone content.

Historical Texts

Alpine folk medicine of Valtellina, Valmalenco and the Rhaetian Alps (Italy/Switzerland)

Traditional / documented in modern ethnobotanical surveys
Known locally as 'iva', the flowering tops have long been harvested by mountain communities and used as an infusion or liqueur ingredient for digestive and gastric complaints.

Alpine digestive liqueur tradition (Amaro Braulio, Bormio; 'Taneda')

Late 19th century onward
Musk yarrow became a signature botanical of regional bitter digestive liqueurs of the Central Alps, reflecting its established reputation as a stomachic and aromatic herb.

References

  1. Vitalini S, Garzoli S, Sisto F, Pezzani R, Argentieri MP, Scarafoni A, Ciappellano S, Zorzan M, Capraro J, Collazuol D, Iriti M. Digestive and gastroprotective effects of Achillea erba-rotta subsp. moschata (Wulfen) I.Richardson (syn. A. moschata Wulfen) (Asteraceae): From traditional uses to preclinical studies . Journal of Ethnopharmacology (2022) [DOI]
  2. Fusani P, Piazza S, Tava A, et al.. Variability in the Essential Oil Composition of Achillea erba-rotta subsp. moschata (Wulfen) I. Richardson Growing in the Eastern Italian Alps . Chemistry & Biodiversity (2022) [DOI]
  3. Vitalini S, et al.. Non-Volatile Terpenoids and Lipophilic Flavonoids from Achillea erba-rotta Subsp. moschata (Wulfen) I. Richardson . Plants (2023) [DOI]
  4. Vitalini S, Beretta G, Iriti M, Orsenigo S, Basilico N, Dall'Acqua S, Iorizzi M, Fico G. Chemical Profile, Antioxidant and Antibacterial Activities of Achillea moschata Wulfen, an Endemic Species from the Alps . Molecules (2016) [DOI]
  5. Vitalini S, et al.. From Primary Data to Ethnopharmacological Investigations on Achillea erba-rotta subsp. moschata (Wulfen) I.Richardson as a Remedy against Gastric Ailments in Valmalenco (Italy) . Plants (2024) [DOI]

This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.

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