A fairy ring, also known as fairy circle, elf circle, elf ring or pixie ring, is a naturally occurring ring or arc of mushrooms. The rings may grow to over 10 metres (33 ft) in diameter, and they become stable over time as the fungus grows and seeks food underground. They are found mainly in forested areas, but also appear in grasslands or rangelands. Fairy rings are detectable by sporocarps in rings or arcs, as well as by a necrotic zone (dead grass), or a ring of dark green grass. Fungus mycelium is present in the ring or arc underneath.
Fairy rings are the subject of much folklore and myth worldwide—particularly in Eastern Europe. While they are often seen as hazardous or dangerous places, they can sometimes be linked with good fortune.
- Genesis 1
- Necrotic or rapid growth zones 2
- Types 3
Species involved 4
- List of species 4.1
Cultural references 5
- Oral tradition and folklore 5.1
- Literature 5.2
- Art 5.3
- Notes 6
- Cited texts 7
- External links 8
- References 9
The mycelium of a fungus growing in the ground absorbs nutrients by secretion of enzymes from the tips of the hyphae (threads making up the mycelium). This breaks down larger molecules in the soil into smaller molecules that are then absorbed through the walls of the hyphae near their growing tips. The mycelium will move outward from the center, and when the nutrients in the center are exhausted, the center dies, thereby forming a living ring, from which the fairy ring arises.
There are two theories regarding the process involved in creating fairy rings. One states that the fairy ring is begun by a spore from the sporocarpus. The underground presence of the fungus can also cause withering or varying colour or growth of the grass above. The second theory, which is presented in the investigations of Japanese scientists on the Tricholoma matsutake species, shows that fairy rings could be established by connecting neighbouring oval genets of these mushrooms. If they make an arc or a ring, they continuously grow about the centre of this object.
Necrotic or rapid growth zones
One of the manifestations of fairy ring growth is a necrotic zone—an area in which grass or other plant life has withered or died. These zones are caused by the mycelia which, during a very dry year, coat the roots of grasses and other herbs in meadows. After some time they are removed by biotic factors from the ground, at which stage a zone on the surface soil becomes visible. Patterns other than the basic ring or arc are also possible: circles, doubled arcs, sickle-shaped arcs, and other complicated formations are also formed by this process. Fungi can deplete the soil of readily available nutrients such as nitrogen, causing plants growing within the circle to be stressed which leads to plant discoloration. Some fungi also produce chemicals which act like hormones called gibberellins, which affect plant growth, causing rapid luxuriant growth.
Long-term observations of fairy rings on Shillingstone Hill in Dorset, England, further suggested that the cycle depended on the continuous presence of rabbits. Chalky soils on higher elevations in the counties of Wiltshire and Dorset in southern England used to support many meadow-type fairy rings. Rabbits crop grass very short in open areas and produce nitrogen-rich droppings. Mushrooms need more soil nitrogen than grass does. A ring can start from a single spore from which the mycelium develops; the fruiting bodies of the mushrooms only appearing later, when sufficient mycelial mass has been generated to support them. Subsequent generations of fungi grow only outwards, because the parent generations have depleted their local nitrogen levels. Meanwhile, rabbits keep cropping the grass, but do not eat the fungi, allowing them to grow through their competition to tower, relatively, above the grass. By the time a circle of mushrooms reaches about 6 metres (20 ft) in diameter, rabbit droppings have replenished the nitrogen levels near the centre of the circle, and a secondary ring may start to grow inside the first.
Soil analysis of soil containing mycelium from a wood blewit (
Fairy rings have featured in the works of European authors, playwrights, and artists since the 13th century. In his Arthurian romance Meraugis de Portlesguez, Raoul de Houdenc describes a scene clearly derived from Celtic fairy-ring lore: The title character visits the Château des Caroles and sees a circle of women and a knight dancing around a pine in the castle courtyard. Meraugis is unable to fight the intense desire to join in, thus freeing the previous knight from the spell. Meraugis is helpless to leave the dance until, ten weeks later, another knight joins it and frees him. Fairy circles feature in works by several Elizabethan poets and playwrights. William Shakespeare alludes to them in A Midsummer Night's Dream, Act II, Scene I ("And I serve the fairy queen, / To dew her orbs upon the green" and "To dance our ringlets to the whistling wind"), and The Tempest, Act V, Scene I:
- ... you demi-puppets that
- By moonshine do the green sour ringlets make,
- Whereof the ewe not bites, and you whose pastime
- Is to make midnight mushrooms, that rejoice
- To hear the solemn curfew ...
- And in their courses make that round
- In meadows and in marshes found,
Of them so called the Fairy Ground,
- Of which they have the keeping.
Fairy imagery became especially popular in the Victorian era. Thomas Hardy uses a fairy ring as a symbol of lost love in The Mayor of Casterbridge (1886); the character Michael Henchard passes a fairy ring and remembers that he last saw his wife Susan there when he sold her to a sailor in a drunken rage. Victorian poets who have referred to fairy rings in their works include Elizabeth Barrett Browning, Eliza Cook, Robert Stephen Hawker, Felicia Hemans, Gerald Massey, and Alfred, Lord Tennyson. W. H. Cummings composed the cantata The Fairy Ring, and William Butler Yeats wrote of them in The Land of Heart's Desire (1894).
Fairy circles have appeared in European artwork since at least the 18th century. For example, William Blake painted Oberon, Titania and Puck with Fairies Dancing, depicting a scene from Shakespeare's A Midsummer Night's Dream, around 1785, and Daniel Maclise painted Faun and the Fairies around 1834. Images of fairies dancing in circles became a favourite trope of painters in the Victorian period. On the one hand, artists were genuinely interested in the culture such imagery represented, and on the other, fairies could be depicted as titillating nudes and semi-nudes without offending Victorian mores, which made them a popular subject of art collectors. Examples of Victorian fairy-ring paintings include Come unto these Yellow Sands (1842) by Richard Dadd and Reconciliation of Titania and Oberon (1847) by Joseph Noel Paton.
Faun and the Fairies (1834) by Daniel Maclise
Come unto These Yellow Sands (1842) by Richard Dadd. Images of nude and semi-nude fairies dancing in rings became popular during the Victorian era.
The Fairy Ring; the Enchanted Piper (c.1880) by William Holmes Sullivan
- 'Chambers's Edinburgh journal, Volume 9 by William Chambers, Robert Chamber, W. Orr, 1841, Page. 55
- "What is a Fungus?". Australian National Botanic Gardens.
- Hjelm, Olof (1996). "Analysis of halogenated organic compounds in coniferous forest soil from a Lepista nuda (wood blewitt) fairy ring". Chemosphere 32 (9): 1719–28.
- Böttcher, Helmuth M. Miracle Drugs William Henemann Ltd. London 1963 p. 227
- Kirk PM, Cannon PF, Minter DW, Stalpers JA. (2008). Dictionary of the Fungi (10th ed.). Wallingford: CABI. p. 253.
- Gregory, P.H. (1982). "Fairy rings; Free and tethered". Bulletin of the British Mycological Society 16 (2): 161–163.
- Edwards PJ. (1988). "Effects of the fairy ring fungus Agaricus arvensis on nutrient availability in grassland". New Phytologist 110 (3): 377–81.
- Wang B, Lu B, Jia DH. (2009). "Genetic relationships between Agaricus campestris fruit bodies from fairy rings based on ISSR markers". Acta Edulis Fungi (in Chinese) 16 (4): 1–4.
- Benjamin, Mushrooms: poisons and panaceas, p. 305.
- Terashima Y, Fukiharu T, Fujiie A. (2004). "Morphology and comparative ecology of the fairy ring fungi, Vascellum curtisii and Bovista dermoxantha, on turf of bentgrass, bluegrass, and Zoysiagrass". Mycoscience 45 (4): 251–60.
- Dickinson, C.H. (1979). "Fairy rings in Norfolk". Bulletin of the British Mycological Society 13 (2): 91–94.
- "Chanterelle Fairy Ring".
- Haas 1969, p. 132.
- Dowson CG, Rayner ADM, Boddy L. (1989). "Spatial dynamics and interactions of the woodland fairy ring fungus Clitocybe nebularis". New Phytologist 111 (4): 699–705.
- Evenson VS (1997). Mushrooms of Colorado and the Southern Rocky Mountains. Big Earth Publishing. p. 121.
- Mercier J, Carson TD, White DB. (1999). "Fairy rings in turf associated with the bird's nest fungus Cyathus stercoreus". Plant disease 83 (8): 781.
- Zeitlmayr, Linus (1976). Wild Mushrooms:An Illustrated Handbook. Garden City Press, Hertfordshire. p. 80.
- Haas 1969, p. 62.
- Haas 1969, p. 130.
- Bas, Cornelis; Kuyper, Th. W.; Noordeloos, M. E. (1995). Flora Agaricina Neerlandica - 3. CRC Press. pp. 74–75.
- Choi J-H, Fushimi K, Abe N, Tanaka H, Maeda S, Morita A, Hara M, Motohashi R, Matsunaga J, Eguchi Y, Ishigaki N, Hashizume D, Koshino H, Kawagishi H. (2010). "Disclosure of the "fairy" of fairy-ring-forming fungus Lepista sordida". Chembiochem 11 (10): 1373–37.
- Nilsson & Persson 1977, p. 38.
- Haas 1969, p. 170.
- Haas 1969, p. 46.
- Nilsson & Persson 1977, p. 24.
- Haas 1969, p. 142.
- Lamaison, Jean-Louis; Polese, Jean-Marie (2005). The Great Encyclopedia of Mushrooms. Könemann. p. 89.
- Morgan 1995, p. 30.
- Morgan 1995, p. 13.
- Morgan 1995, p. 12.
- Hall 75.
- Keightley 1905, p. 81.
- The term for fairy ring in modern Norwegian is alvedans.
- Ripley and Dana 402.
- Sikes 70.
- Gwyndaf 161.
- Bennett 110.
- Gwyndaf 163.
- Silver 175.
- Keightley 1905, p. 297.
- McPherson 96.
- Wilde 39.
- Quoted in Hazlitt 230.
- Coxhead, J. R. W., The Devil in Devon, p. 39-40. Quoted in Briggs 328.
- Radford and Radford 157.
- Bray 149.
- Daniels and Stevens 1300.
- Cielo 73.
- Sikes 85-6.
- Cheviot 398.
- Bray 150.
- Wilde 234.
- Chambers, Popular Rhymes, 324; quoted in McPherson 97.
- Franklin 87.
- Briggs and Tongue 51.
- Sikes 71.
- Howells, W. (1831). Cambrian Superstitions, p. 148; translated in Sikes 83.
- Rhys 108.
- Hartland 165-6.
- Trevelyan and Hartland 97.
- Hartland 163.
- Sikes 75.
- Rhys 239–240.
- Sikes 72.
- Hartland 166-7.
- Hartland 164.
- Keightley 1905, p. 310.
- Daniels and Stevens 1406.
- Pickering 186.
- Hazlitt 231.
- Rhys 60.
- Rhys 140-1.
- Paton 90–92.
- Hazlitt 230.
- Shakespeare, A Midsummer Night's Dream, Act II, Scene I.
- Shakespeare, The Tempest, Act V, Scene I.
- Silver 153.
- See Browning, "The Deserted Garden"; Cook, "'Don't You Remember?'"; Hawker, "The Fairy Vision" and "Chorus of Fairies"; Hemans, "Canto III"; Massey, "Love's Fairy-ring"; and Tennyson, "Guinevere".
- Skelton 181.
- Silver 26.
- Silver 230, note 20.
- Bennett, Margaret (1991). "Balquhidder Revisited: Fairylore in the Scottish Highlands, 1690–1990", The Good People: New Fairylore Essays. Lexington: The University Press of Kentucky. ISBN 0-8131-0939-6.
- Bray, Mrs. (1854). A Peep at the Pixies; or, Legends of the West. London: Grant and Griffith.
- Briggs, Katherine M. (2002). British Folk-Tales and Legends. Routledge. ISBN 0-415-28602-6.
- Briggs, Katherine M., and Ruth L. Tongue, eds. (1965). Folktales of England. The University of Chicago Press. ISBN 0-226-07493-5.
- Cheviot, Andrew (1898). Proverbs, Proverbial Expressions, and Popular Rhymes of Scotland. London: Alexander Gardner.
- Cielo, Astra (1918). Signs, Omens and Superstitions. New York City: George Sully & Company.
- Croker, Thomas Crofton (1838). Fairy Legends and Traditions of the South of Ireland v. 1–3. London: John Murray.
- Daniels, Cora Linn, and C. M. Stevens, eds. (1903). Encyclopaedia of Superstitions, Folklore, and the Occult Sciences of the World, Vol. 3. Milwaukee, Wisconsin: J. H. Yewdale & Sons Co.
- Drayton, Michael (2002 ). Nymphidia: The Court of Fairy. Luminarium Editions. Online version accessed 10 March 2008.
- Franklin, Anna (2002). The Illustrated Encyclopedia of Fairies. London: Paper Tiger. ISBN 1-84340-240-8.
- Gwyndaf, Robin (1991). "Fairylore: Memorates and Legends from Welsh Oral Tradition", The Good People: New Fairylore Essays. Lexington: The University Press of Kentucky. ISBN 0-8131-0939-6.
- Haas, Hans (1969). The Young Specialist looks at Fungi. Burke. p. 132.
- Hall, Alaric (2007). Elves in Anglo-Saxon England: Matters of Belief, Health, Gender and Identity. Rochester, New York: Boydell & Brewer. ISBN 978-1-84383-294-2
- Hartland, Edwin Sidney (1891). The Science of Fairy Tales: An Inquiry into Fairy Mythology. London: Walter Scott.
- Hazlitt, W. Carew (1905). Faiths and Folklore: A Dictionary of National Beliefs, Superstitions and Popular Customs, Past and Current, with Their Classical and Foreign Analogues, Described and Illustrated, Vol I. London: Reeves and Turner.
- Keightley, Thomas (1905). The Fairy Mythology: Illustrative of the Romance and Superstition of Various Countries. London, United Kingdom: George Bell & Sons.
- McPherson, J. M. (2003 ). Primitive Beliefs in the Northeast of Scotland. Kessinger Publishing. ISBN 0-7661-6310-5.
- Morgan, Adrian (1995). Toads and Toadstools: The Natural History, Folklore, and Cultural Oddities of a Strange Association. Berkeley, California: Celestial Arts Publishing.
- Nilson, Sven; Persson, Olle (1977). Fungi of Northern Europe 2: Gill-Fungi. Penguin.
- Paton, Lucy Allen (1970 ). Studies in the Fairy Mythology of Arthurian Romance, 2nd ed. New York City: Burt Franklin. ISBN 0-8337-2683-8.
- Pickering, David (1995). Cassell's Dictionary of Superstitions. London: Wellington House. ISBN 0-304-36561-0.
- Radford, E., and M. A. Radford (1996 ). The Encyclopedia of Superstitions, revised and enlarged edition. Barnes & Noble, Inc. ISBN 0-7607-0228-4.
- Rhys, John (1901). Celtic Folklore: Welsh and Manx, Vol. I. Oxford at the Clarendon Press.
- Ripley, George, and Charles A. Dana, eds. (1864). "Fairy Circle", The New American Cyclopædia: A Popular Dictionary of General Knowledge, Vol. VII. New York City: D. Appleton and Company.
- Shakespeare, William (1993 ). A Midsummer Night's Dream. The Tech. Online version accessed 10 March 2008.
- Shakespeare, William (1993 ). The Tempest. The Tech. Online version accessed 10 March 2008.
- Sikes, Wirt (1880). British Goblins: Welsh Folk-lore, Fairy Mythology, Legends and Traditions. London: Sampson Low, Marston, Searle, & Rivington.
- Silver, Carol G. (1999). Strange and Secret Peoples: Fairies and Victorian Consciousness. Oxford University Press. ISBN 0-19-512199-6.
- Skelton, Robin (1990). "Margaret Blackwood". Earth, Air, Fire, Water. Arkana, Penguin Group. p. 181.
- Trevelyan, Marie, and E. Sidney Hartland (2002 ). Folk-Lore and Folk-Stories of Wales. Kessinger Publishing. ISBN 1-4254-9354-8.
- Wilde, Lady (1902). Ancient Legends, Mystic Charms & Superstitions of Ireland with Sketches of the Irish Past. London: Chatto & Windus.
- Fairy Ring information
- from California FungiMarasmius oreades
- as Norwegian fungus of the month, with ring photographsMarasmius oreades – from webarchive
Some legends assert that the only safe way to investigate a fairy ring is to run around it nine times. This affords the ability to hear the fairies dancing and frolicking underground. According to a 20th-century tradition of Northumberland, this must be done under a full moon, and the runner must travel in the direction of the sun; to go widdershins allows the fairies to place the runner under their sway. To circle the ring a tenth time is foolhardy and dangerous. Keightley recorded a similar tradition from Northumberland in 1905: "The children constantly run this number [nine times], but nothing will induce them to venture a tenth run." A story from early 20th century England says that a mortal can see the sprites without fear if a friend places a foot on that of the person stepping beyond the circle's perimeter. Another superstition says that wearing a hat backwards can confuse the fairies and prevent them from pulling the wearer into their ring.
Mortals who have danced with the fairies are rarely safe after being saved from their enthrallment. Often, they find that what seemed to be but a brief foray into fairyland was indeed much longer in the mortal realm, possibly weeks or years. The person rescued from the fairy ring may have no memory of their encounter with the sprites, as in a story from Anglesea recorded in 1891. In most tales, the saved interlopers face a grim fate. For example, in a legend from Carmarthenshire, recorded by Sikes, a man is rescued from a fairy ring only to crumble to dust. In a tale from Mathavarn, Llanwrin Parish, a fairy-ring survivor moulders away when he eats his first bite of food. Another vulnerability seems to be iron; in a tale from the Aberystwyth region, a touch from the metal causes a rescued woman to disappear.
Freedom from a fairy ring often requires outside intervention. A tactic from early 20th-century Wales is to cast wild marjoram and thyme into the circle and befuddle the fairies; another asks the rescuer to touch the victim with iron. Other stories require that the enchanted victim simply be plucked out by someone on the outside, although even this can be difficult: A farmer in a tale from the Langollen region has to tie a rope around himself and enlist four men to pull him from the circle as he goes in to save his daughter. Other folk methods rely on Christian faith to break the enchantment: a stick from a rowan tree (thought to be the wood from which the cross of Jesus Christ was built) can break the curse, as can a simple phrase such as "what, in Heaven's name", as in a 19th-century tale from Carmarthenshire. A common element to these recoveries is that the rescuer must wait a year and a day from the point where the victim entered the ring.
Entering the ring on May Eve or Halloween night was especially dangerous. One source near Afon fach Blaen y Cae, a tributary of the Dwyfach, tells of a shepherd accidentally disturbing a ring of rushes where fairies are preparing to dance; they capture him and hold him captive, and he even marries one of them. In variants from Scotland recorded by Edwin Sidney Hartland in 1891, the ring is replaced by a cavern or an old mill.
... he saw the Tylwyth Teg, in appearance like tiny soldiers, dancing in a ring. He set out for the scene of revelry, and soon drew near the ring where, in a gay company of males and females, they were footing it to the music of the harp. Never had he seen such handsome people, nor any so enchantingly cheerful. They beckoned him with laughing faces to join them as they leaned backward almost falling, whirling round and round with joined hands. Those who were dancing never swerved from the perfect circle; but some were clambering over the old cromlech, and others chasing each other with surprising swiftness and the greatest glee. Still others rode about on small white horses of the most beautiful form ... All this was in silence, for the shepherd could not hear the harps, though he saw them. But now he drew nearer to the circle, and finally ventured to put his foot in the magic ring. The instant he did this, his ears were charmed with strains of the most melodious music he had ever heard.
Numerous legends focus on mortals entering a fairy ring—and the consequences. One superstition is that anyone who steps into an empty fairy ring will die at a young age. A 20th-century tradition from Somerset calls the fairy ring a "galley-trap" and says that a murderer or thief who walks in the ring will be hanged. Most often, someone who violates a fairy perimeter becomes invisible to mortals outside and may find it impossible to leave the circle. Often, the fairies force the mortal to dance to the point of exhaustion, death, or madness. In Welsh tales, fairies actively try to lure mortals into their circles to dance with them. A tale from the Cambrian Mountains of Wales, current in the 19th century, describes a mortal's encounter with a fairy ring:
- He wha tills the fairies' green
- Nae luck again shall hae :
- And he wha spills the fairies' ring
- Betide him want and wae.
- For weirdless days and weary nights
- Are his till his deein' day.
- But he wha gaes by the fairy ring,
- Nae dule nor pine shall see,
- And he wha cleans the fairy ring
- An easy death shall dee.
A traditional Scottish rhyme sums up the danger of such places:
Many folk beliefs generally paint fairy rings as dangerous places, best avoided. Sikes traces these stories of people trespassing into forbidden territory and being punished for it to the tale of Psyche and Eros. In it, Psyche is forbidden to view her lover, and when she does so, her palace disappears and she is left alone. Superstition calls fairy circles sacred and warns against violating them lest the interloper (such as a farmer with a plough) anger the fairies and be cursed. In an Irish legend recorded by Wilde, a farmer builds a barn on a fairy ring despite the protests of his neighbours. He is struck senseless one night, and a local "fairy doctor" breaks the curse. The farmer says that he dreamed that he must destroy the barn. Even collecting dew from the grass or flowers of a fairy ring can bring bad luck. Destroying a fairy ring is unlucky and fruitless; superstition says it will just grow back.
The folklores of the British Isles contain a wealth of fairy lore, including the idea from which fairy rings take their name: the phenomena result from the dancing of fairies. In 19th-century Wales, where the rings are known as cylch y Tylwyth Teg, fairies were almost invariably described as dancing in a group when encountered, and in Scotland and Wales in the late 20th century, stories about fairy rings were still common; some Welsh even claimed to have joined a fairy dance. Victorian folklorists regarded fairies and witches as related, based in part on the idea that both were believed to dance in circles. These revels are particularly associated with moonlit nights, the rings only becoming visible to mortals the following morning. Local variants add other details. An early 20th-century Irish tradition says that fairies enjoy dancing around the hawthorn tree so that fairy rings often centre on one. One resident of Balquhidder, Scotland, said that the fairies sit on the mushrooms and use them as dinnertables, and a Welsh woman claimed that fairies used the mushrooms as parasols and umbrellas. Olaus Magnus in Historia de Gentibus Septentrionalibus wrote that the brightness of the fairy ring comes not from the dancing of the fairies, who harm it with their feet, but from Puck, who refreshes the grass. A Devon legend says that a black hen and chickens sometimes appear at dusk in a large fairy ring on the edge of Dartmoor. A Welsh and Manx variant current in the 1960s removes dancing from the picture and claims that fairy rings spring up over an underground fairy village. These associations have become linked to specific sites. For example, "The Pixies' Church" was a rock formation in Dartmoor surrounded by a fairy ring, and a stone circle tops Cader Idris in northern Wales, believed to be a popular spot for fairy dances.
 British folklorist Thomas Keightley noted that in Scandinavia in the early 20th century, beliefs persisted that fairy rings (elfdans) arose from the dancing of elves. Keightley warned that while entering an elfdans might allow the interloper to see the elves—although this was not guaranteed—it would also put the intruder in thrall to their illusions.
A great deal of folklore surrounds fairy rings. Their names in European languages often allude to supernatural origins; they are known as ronds de sorciers ("sorcerers' rings") in France, and Hexenringe ("witches' rings") in German. In German tradition, fairy rings were thought to mark the site of witches' dancing on 
Oral tradition and folklore
- Agaricus arvensis
- Agaricus campestris
- Agaricus praerimosus
- Agrocybe praecox
- Amanita muscaria
- Amanita phalloides
- Amanita rubescens
- Bovista dermoxantha
- Calocybe gambosa
- Calvatia cyathiformis
- Calvatia gigantea
- Cantharellus cibarius
- Clitocybe dealbata
- Clitocybe nebularis
- Clitocybe nuda
- Clitocybe rivulosa
- Chlorophyllum molybdites
- Chlorophyllum rhacodes
- Cortinarius glaucopus
- Cyathus stercoreus
- Disciseda subterranea
- Entoloma sinuatum
- Gomphus clavatus
- Hygrophorus agathosmus 
- Infundibulicybe geotropa
- Lepista flaccida
- Lepista sordida
- Leucopaxillus giganteus 
- Lycoperdon curtisii
- Lycoperdon gemmatum
- Macrolepiota procera
- Marasmius oreades
- Sarcodon imbricatus
- Suillus luteus
- Tricholoma album
- Tricholoma orirubens
- Tricholoma pardinum
- Tricholoma matsutake
- Tricholoma terreum
- Tuber melanosporum
List of species
One of the largest rings ever found is near Belfort in France. Formed by Infundibulicybe geotropa, it is thought to be about 600 metres (2,000 ft) in diameter and over 700 years old. On the South Downs in southern England, Calocybe gambosa has formed huge fairy rings that also appear to be several hundred years old.
There are about 60 mushroom species which can grow in the fairy ring pattern. The best known is the edible Scotch bonnet (Marasmius oreades), commonly known as the fairy ring champignon.
There are two generally recognised types of fairy ring fungus. Those found in the woods are called tethered, because they are formed by saprotrophic. The effects on the grass depend on the type of fungus that is growing; when Calvatia cyathiformis is growing in the area grass will grow more abundantly; however, Leucopaxillus giganteus will cause the grass to wither.