Achillea millefolium, known commonly as yarrow // or common yarrow, is a flowering plant in the family Asteraceae. It is native to temperate regions of the Northern Hemisphere in Asia, Europe, and North America. In New Mexico and southern Colorado, it is called plumajillo (Spanish for 'little feather') from its leaf shape and texture. In antiquity, yarrow was known as herbal militaris, for its use in stanching the flow of blood from wounds. Other common names for this species include gordaldo, nosebleed plant, old man's pepper, devil's nettle, sanguinary, milfoil, soldier's woundwort, thousand-leaf, and thousand-seal.
Description[edit source | edit]
Achillea millefolium is an erect herbaceous perennial plant that produces one to several stems 0.2–1 metre (0.66–3.3 ft) in height, and has a spreading rhizomatous growth form. Leaves are evenly distributed along the stem, with the leaves near the middle and bottom of the stem being the largest. The leaves have varying degrees of hairiness (pubescence). The leaves are 5–20 cm long, bipinnate or tripinnate, almost feathery, and arranged spirally on the stems. The leaves are cauline, and more or less clasping.
The inflorescence has 4 to 9 phyllaries and contains ray and disk flowers which are white to pink. The generally 3 to 8 ray flowers are ovate to round. Disk flowers range from 15 to 40. The inflorescence is produced in a flat-topped cluster. The fruits are small achenes.
Distribution[edit source | edit]
Yarrow grows from sea level to 3,500 metres (11,500 ft) in elevation. The plant commonly flowers from May through June. Common yarrow is frequently found in the mildly disturbed soil of grasslands and open forests. Active growth occurs in the spring.
In North America, both native and introduced genotypes, and both diploid and polyploid plants are found. It is found in every habitat throughout California, except the Colorado and Mojave Deserts. common yarrow produces and average yield of 43,000 plants per acre, with a total dry weight of 10,500 ibs 
Varieties[edit source | edit]
- Achillea millefolium subsp. millefolium
- A. m. subsp. m. var. millefolium - Europe, Asia
- A. m. subsp. m. var. borealis - Arctic regions
- A. m. subsp. m. var. rubra - Southern Appalachians
- A. millefolium subsp. chitralensis - western Himalaya
- A. millefolium subsp. sudetica - Alps, Carpathians
- Achillea millefolium var. alpicola — Western United States, Alaska 
- Achillea millefolium var. californica — California, Pacific Northwest 
- Achillea millefolium var. occidentalis — North America 
- Achillea millefolium var. pacifica — west coast of North America, Alaska 
- Achillea millefolium var. puberula — endemic to California 
Uses[edit source | edit]
Cultivation[edit source | edit]
Achillea millefolium is cultivated as an ornamental plant by many plant nurseries. It is planted in gardens and natural landscaping settings of diverse climates and styles. They include native plant, drought-tolerant, and wildlife gardens. The plant is a frequent component of butterfly gardens. The plant prefers well-drained soil in full sun, but can be grown in less ideal conditions.
Propagation[edit source | edit]
For propagation, seeds require light for germination, so optimal germination occurs when planted no deeper than one-quarter inch (6 mm). Seeds also require a germination temperature of 18-24° (64-75°F). It has a relatively short life in some situations, but may be prolonged by division in the spring every other year, and planting 12–18 in (30–46 cm) apart. It can become invasive.
Cultivars[edit source | edit]
The species use in traditional gardens has generally been superseded by cultivars with specific 'improved' qualities. Some are used as drought tolerant lawn replacements, with periodic mowing.
The many different ornamental cultivars include: 'Paprika', 'Calistoga', 'Cerise Queen', 'Island Pink', and 'Red Beauty'. and 'Sonoma Coast'. Several, including 'Kelwayi', and 'Lansdorferglut' have gained the Royal Horticultural Society's Award of Garden Merit.
Companion planting[edit source | edit]
Yarrow, Achillea millefolium, is considered an especially useful companion plant, repelling some insect pests while attracting good, predatory ones. It attracts predatory wasps, which drink the nectar and then use insect pests as food for their larvae. Similarly, it attracts ladybugs and hoverflies.
It is also planted for improving soil quality. Its leaves are thought to be good fertilizer, and a beneficial additive for compost.
It is also considered directly beneficial to other plants, improving the health of sick plants when grown near them.
Agriculture[edit source | edit]
Achillea millefolium can be planted to combat soil erosion due to the plant's resistance to drought. Before the arrival of monocultures of ryegrass, both grass leys and permanent pasture always contained A. millefolium at a rate of about 0.3 kg/ha. At least one of the reasons for its inclusion in grass mixtures was its deep roots, with leaves rich in minerals. Thus its inclusion helped to prevent mineral deficiencies in the ruminants to which it was fed.
Herbal and traditional uses[edit source | edit]
The herb is purported to be a diaphoretic, astringent, tonic, stimulant and mild aromatic. It contains isovaleric acid, salicylic acid, asparagin, sterols, flavonoids, bitters, tannins, and coumarins. The plant also has a long history as a powerful 'healing herb' used topically for wounds, cuts and abrasions. The genus name Achillea is derived from mythical Greek character, Achilles, who reportedly carried it with his army to treat battle wounds. This medicinal action is also reflected in some of the common names mentioned below, such as staunchweed and soldier's woundwort.
In the Middle Ages, yarrow was part of a herbal mixture known as gruit used in the flavouring of beer prior to the use of hops. The flowers and leaves are used in making some liquors and bitters.
Traditional names for A. millefolium include arrowroot, bad man's plaything, bloodwort, carpenter's weed, death flower, devil's nettle, eerie, field hops, gearwe, hundred leaved grass, knight's milefoil, knyghten, milefolium, milfoil, millefoil, noble yarrow, nosebleed, old man's mustard, old man's pepper, sanguinary, seven year's love, snake's grass, soldier, soldier's woundwort, stanchweed, thousand seal, woundwort, yarroway, yerw. The English name yarrow comes from the Saxon (Old English) word gearwe, which is related to both the Dutch word gerw and the Old High German word garawa.
Yarrow has also been used as a food, and was very popular as a vegetable in the 17th century. The younger leaves are said to be a pleasant leaf vegetable when cooked like spinach, or in a soup. Yarrow is sweet with a slight bitter taste. The leaves can also be dried and used as a herb in cooking.
A. millefolium has seen historical use as a medicine, often because of its astringent effects.
The leaves encourage clotting, so it can be used fresh for nosebleeds. The aerial parts of the plant are used for phlegm conditions, as a bitter digestive tonic to encourage bile flow, and as a diuretic. The aerial parts act as a tonic for the blood, stimulate the circulation, and can be used for high blood pressure; it is also useful in menstrual disorders, and as an effective sweating remedy to bring down fevers.
Native American uses[edit source | edit]
Yarrow, Achillea millefolium and its North American varieties, was used in traditional Native American herbal medicine by tribes across the continent. The Navajo considered it to be a "life medicine", chewed it for toothaches, and poured an infusion into ears for earaches. The Miwok in California used the plant as an analgesic and head cold remedy.
Several tribes of the Plains Indians used common yarrow. The Pawnee used the stalk for pain relief. The Chippewa used the leaves for headaches by inhaling it in a steam. They also chewed the roots and applied the saliva to their appendages as a stimulant. The Cherokee drank a tea of common yarrow to reduce fever and aid in restful sleep.
Among the Zuni people use the occidentalis variety medicinally. The blossoms and root are chewed, and the juice applied before fire-walking or fire-eating. A poultice of the pulverized plant is mixed with water and applied to burns.
Dangers[edit source | edit]
In rare cases, yarrow can cause severe allergic skin rashes; prolonged use can increase the skin's photosensitivity. This can be triggered initially when wet skin comes into contact with cut grass and yarrow together.
In one study, aqueous extracts of yarrow impaired the sperm production of laboratory rats.
Birds[edit source | edit]
Several cavity-nesting birds, including the common starling, use yarrow to line their nests. Experiments conducted on the tree swallow, which does not use yarrow, suggest adding yarrow to nests inhibits the growth of parasites.
Similar plants[edit source | edit]
- Similar species
- Similar genera
Other plants with white flowers in large compound umbels may be confused with Achillea millefolium, these include: water parsnip—Sium suave (swamp parsnip); western water hemlock—Cicuta douglasii (poison hemlock); and spotted water hemlock—Cicuta maculata (spotted parsley, spotted cowbane). Water parsnip and water hemlock have clusters of small white flowers that are shaped like umbrellas, and both grow in moist soils. Water parsnip leaves are once compound, and water hemlock leaves are three times compound. Water hemlock has a large swelling at the stem base. All parts of water hemlock are highly poisonous.
Gallery[edit source | edit]
Illustration in Koehlers Medizinal-Pflanzen in naturgetreuen Abbildungen und kurz erläuterndem Texte (Franz Eugen Köhler; 1883-1914). Achillea millefolium at BioTrek, California State Polytechnic University, Pomona.
Field of Yarrow in Russia.
See also[edit source | edit]
References[edit source | edit]
- Gualtiero Simonetti (1990). Stanley Schuler, ed. Simon & Schuster's Guide to Herbs and Spices. Simon & Schuster, Inc. ISBN 0-671-73489-X.
- Dodson & Dunmire, 2007, Mountain Wildfowers of the Southern Rockies, UNM Press, ISBN 978-0-8263-4244-7
- Achillea millefolium in Flora of North America @ efloras.org . accessed 1.31.2013
- Alan S. Weakley (April 2008). "Flora of the Carolinas, Virginia, and Georgia, and Surrounding Areas".
- Jepson Manual treatment for ACHILLEA millefolium . accessed 1.31.2013
- Calflora database: Achillea millefolium . accessed 1.31.2013
- A Grower’s Guide_Yarrow_Achillea millefolium
- USDA Plants Profile for Achillea millefolium var. alpicola (common yarrow) . accessed 1.31.2013
- Profile for Achillea millefolium var. californica (California yarrow) . accessed 1.31.2013
- Tropicos: Achillea millefolium var. californica . accessed 1.31.2013
- Bert Wilson (2012-07-29). "Las Pilitas Nursery horticultural treatment: ''Achillea millefolium'' var. ''californica''". Laspilitas.com. Retrieved 2013-05-19.
- USDA Plants Profile for Achillea millefolium var. occidentalis (western yarrow) . accessed 1.31.2013
- USDA Plants Profile for Achillea millefolium var. pacifica (Pacific yarrow) . accessed 1.31.2013
- USDA Plants Profile for Achillea millefolium var. puberula . accessed 1.31.2013
- Missouri Botanical Garden horticultural treatment: Achillea millefolium . accessed 1.31.2013
- Fine Gardening magazine Plant Guide — Achillea millefolium (Yarrow) . accessed 1.31.2013
- Lady Bird Johnson Wildflower Center Native Plant Database: Achillea millefolium (common yarrow) . accessed 1.31.2013
- USDA, NRCS. 2006. The PLANTS Database (http://plants.usda.gov, 22 May 2006). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
- RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964.
- San Marcos Growers horticulture — The Yarrow Lawn . accessed 1.31.2013
- "Missouri Botanical Garden horticultural treatment: ''Achillea millefolium'' 'Paprika'". Missouribotanicalgarden.org. Retrieved 2013-05-19.
- "California Natives Wiki: ''Achillea millefolium'' 'Calistoga'". Theodorepayne.org. 2010-08-19. Retrieved 2013-05-19.
- Bert Wilson (2012-01-08). "Las Pilitas Nursery: ''Achillea millefolium rosea'' Island Pink (Pink Yarrow)". Laspilitas.com. Retrieved 2013-05-19.
- "Missouri Botanical Garden horticultural treatment: ''Achillea millefolium'' 'Red Beauty'". Missouribotanicalgarden.org. Retrieved 2013-05-19.
- "California Natives Wiki: ''Achillea millefolium'' 'Sonoma Coast'". Theodorepayne.org. 2010-08-19. Retrieved 2013-05-19.
- "RHS Plant Selector Achillea millefolium 'Kelwayi' / RHS Gardening". Apps.rhs.org.uk. Retrieved 2013-05-19.
- "RHS Plant Selector Achillea millefolium 'Lansdorferglut' AGM / RHS Gardening". Apps.rhs.org.uk. Retrieved 2013-05-19.
- Clausen, Ruth Rogers; Ekstrom, Nicolas H. (1989). Perennials for American gardens. New York: Random House. p. 4. ISBN 0-394-55740-9.
- Monrovia Growers: Achillea x 'Moonshine' — Moonshine Yarrow.
- Yarrow Herb[dead link]
- Alma R. Hutchens (1973). Indian Herbology of North America. Shambhala Publications. ISBN 0-87773-639-1.
- "Introduction to the I Ching - By Richard Wilhelm". Iging.com. Retrieved 2013-05-19.
- Oxford English Dictionary. 2nd ed. Yarrow.
- Inhibitory effect of lactone fractions and individual components from three species of the Achillea millefolium complex of Bulgarian origin on the human neutrophils respiratory burst activity Choudhary M.I., Jalil S., Todorova M., Trendafilova A., Mikhova B., Duddeck H. Natural Product Research 2007 21:11 (1032-1036)
- Teresa Skwarek (1979). "Effects of Herbal Preparations on the propagation of influenza viruses". Acta Polon Pharm. XXXVI (5): 1–7.
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- Combining Western Herbs and Chinese Medicine (book), 2003, "Achillea", P.165-181. Jeremy Ross. ISBN 978-0-9728193-0-5.
- Rodale's Illustrated Encyclopedia of Herbs, Kowalchik C & Hylton WH, Eds, "Companion Planting", P.108. ISBN 978-0-87596-964-0.
- Rodale's Illustrated Encyclopedia of Herbs, Kowalchik C & Hylton WH, Eds, P.293, 367, 518. ISBN 978-0-87596-964-0
- Analgesic Effect of aqueous extract of Achillea millefolium L. on rat's formalin test Noureddini M., Rasta V.-R. Pharmacologyonline 2008 3 (659-664)
- Benedek, Birgit; Kopp, Brigitte (2007). "Achillea millefolium L. S.l. Revisited: Recent findings confirm the traditional use". Wiener Medizinische Wochenschrift 157 (13–14): 312–314. doi:10.1007/s10354-007-0431-9. PMID 17704978.
- Aqueous extract of Achillea millefolium L. (Asteraceae) inflorescences suppresses lipopolysaccharide-induced inflammatory responses in RAW 264.7 murine macrophages Burk D.R., Cichacz Z.A., Daskalova S.M. Journal of Medicinal Plant Research 2010 4:3 (225-234)
- Choleretic effects of yarrow (Achillea millefolium s.l.) in the isolated perfused rat liver Benedek B., Geisz N., Jäger W., Thalhammer T., Kopp B. Phytomedicine 2006 13:9-10 (702-706)
- Effects of two Achillea species tinctures on experimental acute inflammation Popovici M., Pârvu A.E., Oniga I., Toiu A., Tǎmaş M., Benedec D. Farmacia 2008 56:1 (15-23)
- In vitro estrogenic activity of Achillea millefolium L. Innocenti G., Vegeto E., Dall'Acqua S., Ciana P., Giorgetti M., Agradi E., Sozzi A., Fico G., Tomè F. Phytomedicine 2007 14:2-3 (147-152)
- Antiulcerogenic activity of hydroalcoholic extract of Achillea millefolium L.: Involvement of the antioxidant system Potrich F.B., Allemand A., da Silva L.M., dos Santos A.C., Baggio C.H., Freitas C.S., Mendes D.A.G.B., Andre E., de Paula Werner M.F., Marques M.C.A. Journal of Ethnopharmacology 2010 130:1 (85-92)
- "Chinese Superstitions". Chinatownconnection.com. Retrieved 2013-05-19.
- Homer. Iliad. pp. 11.828–832.
- University of Michigan - Dearborn: Native American Ethnobotany; Achillea millefolium . accessed 1.31.2013
- Stevenson, Matilda Coxe 1915 Ethnobotany of the Zuni Indians. SI-BAE Annual Report #30 (p. 42)
- Contact Dermatitis 1998, 39:271-272.
- Dalsenter P, Cavalcanti A, Andrade A, Araújo S, Marques M (2004). "Reproductive evaluation of aqueous crude extract of Achillea millefolium L. (Asteraceae) in Wistar rats". Reprod Toxicol 18 (6): 819–23. doi:10.1016/j.reprotox.2004.04.011. PMID 15279880.
- Shutler D, Campbell AA (2007). "Experimental addition of greenery reduces flea loads in nests of a non-greenery using species, the tree swallow Tachycineta bicolor". Journal of Avian Biology 38 (1): 7–12. doi:10.1111/j.2007.0908-8857.04015.x.
- Essential oil composition and larvicidal activity of six Mediterranean aromatic plants against the mosquito Aedes albopictus (Diptera: Culicidae) Conti B., Canale A., Bertoli A., Gozzini F., Pistelli L. Parasitology Research 2010 107:6 (1455-1461)
- "Cicuta maculata".
Further reading[edit source | edit]
- Blanchan, Neltje (2005). Wild Flowers Worth Knowing. Project Gutenberg Literary Archive Foundation.
- Wood, John (2006). Hardy Perennials and Old Fashioned Flowers. Project Gutenberg Literary Archive Foundation.
- Hickman, James C., ed. (1993). The Jepson Manual: Higher plants of California. Berkeley, Los Angeles, and London: University of California Press.
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