A fairy ring, also known as fairy circle, elf circle or pixie ring, is a naturally occurring ring or arc of mushrooms. The rings may grow over ten meters in diameter and 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 not only detectable by sporocarps in rings or arcs, but also by a necrotic zone (dead grass) or a ring of dark green grass. If these manifestations are visible a fairy fungus mycelium is likely present in the ring or arc underneath.
Fairy rings also occupy a prominent place in European folklore as the location of gateways into elfin kingdoms, or places where elves gather and dance.
There are two theories regarding the process involved in creating fairy rings. One states that 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. Mushrooms, the fruiting bodies of fungi that poke their heads up out of the soil after rainstorms, tell only part of the fungi's story. Hidden in the soil is a huge network of threadlike mycelia. Mushrooms are not individual organisms. Rather, they are just one part of the mycelia lurking beneath your lawn.
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.
One of the three manifestations is a necrotic zone, or area in which grass or other plant life has withered or died. These 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 we can see a zone on the surface soil. 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 like nitrogen, causing plant growing within the circle to be stressed which leads to plant discoloration. Some fungi also produce chemicals that act like hormones called gibberellins, which affects plant growth, causing rapid luxuriant growth.
There are two generally recognised types of fairy ring fungus. Those found in the woods are called tethered, because they are formed by mycorrhizal fungi living in commensalism with trees. Meadow fairy rings are called free, because they are not connected with other organisms. These mushrooms are 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, Clitocybe gigantea will cause the grass to wither.
It is said that there are about 40 to 60 mushroom species which can grow in the fairy ring pattern. The best known is the edible Scotch bonnet (Marasmius oreades), which is commonly known as the fairy ring champignon.
One of the largest rings ever found is in France. Formed by Clitocybe geotropa, it is thought to be about 600 m in diameter and over 700 years old. 
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 Walpurgis Night, and Dutch superstition claimed that the circles show where the Devil set his milk churn. In Tyrol, folklore attributed fairy rings to the fiery tales of flying dragons; once a dragon had created such a circle, nothing but toadstools could grow there for seven years. European superstitions routinely warned against entering a fairy ring. French tradition reported that fairy rings were guarded by giant bug-eyed toads that cursed those who violated the circles. In other parts of Europe, entering a fairy ring would result in the loss of an eye. Fairy rings are associated with diminutive spirits in the Philippines.
Scandinavian and Celtic traditions claimed that fairy rings are the result of elves or fairies dancing. Such ideas dated to at least the mediæval period; The Middle English term elferingewort ("elf-ring"), meaning "a ring of daisies caused by elves' dancing" dates to the 12th century. In his History of the Goths (1628), Olaus Magnus makes this connection, saying that fairy rings are burned into the ground by the dancing of elves. British folklorist Thomas Keightley noted that in Scandinavia in the early 20th century, beliefs persisted that fairy circles (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.
The Celtic folklore of England, Ireland, Scotland, and Wales 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 "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.
Celtic 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.
A traditional Scottish rhyme sums up the danger of such places:
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 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.
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.
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.
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.
Celtic legends often 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. Thomas 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.
Although they have strong associations with doom, some legends paint fairy circles as places of fertility and fortune. Welsh folk belief is that mountain sheep that eat the grass of a fairy ring flourish, and that crops sown from such a place will prove more bountiful that those from normal land. A folk belief recorded in the Athenian Oracle claims that a house built on a fairy circle will bring prosperity to its inhabitants. Likewise, a legend from Pont y Wern says that in the 13th or 14th century, the inhabitants of the town of Corwrion watched fairies dancing in a ring around a glow worm every Sunday after church at a place called Pen y Bonc. They even joined the sprites in their revels. The legend survives in a rhyme: "With the fairies nimbly dancing round / The glow-worm on the Rising Ground." A Welsh tale recorded by Rhys in 1901 tells of a man who supposedly lived on the side of the Berwyn, above Cwm Pennant, in the early 19th century. The man destroyed a nest of rooks in a tree surrounded by a fairy ring. In gratitude, the fairies gave him a half crown every day but stopped when he told his friends, "for he had broken the rule of the fair folks by making their liberality known". Nevertheless, fairy boons are not without their curses, and tales often tell of the sprites exacting their revenge.
Fairy rings have featured in the works of European authors, playwrights, and artists from as early as 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:
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 Reconciliaion of Titania and Oberon (1847) by Joseph Noel Paton.
Modern depictions continue in a similar vein. The online game RuneScape features a magical fairy-ring network used for transportation, and Ultima Online includes circles of mushrooms in several locations. The popularity of the garden gnome in England may be the most visible manifestation of the imprint of fairy-ring imagery on popular culture, as it links the fairy-like gnome with imagery of toadstools and mushrooms.
Fairy rings should not be confused with circular cropmarks. These are caused by the enhanced growth of grass or crops over buried archaeological features, particularly the infilled ditches of round barrows or the foundation slots of roundhouses.
Fairy Rings is a research project. It describes and investigates the origin, structure and dynamics of the well-known phenomenon called "Fairy rings". The first section describes clearly what it is, you can also find out in here a section which will offer you a further reeding. Third section offers disambiguation to activities which you can join. The section "Aims of the project" are offering short time aims, which springs during the project development. Very important sections about how we can help other Wikimedia´s Foundation wikiprojects follow and what you can learn by participating in here. The last section offers disambiguation on different ways of sharing ideas, pictures - its focused on discussion and brainstorming. Don't be afraid to ask anytime you need, thats why it is a Wikiversity!
Fairy ring is a natural phenomenon caused by fungi. Its performed by sporocarps growing in a ring, ring of necrotic zone (when there is no grass nor other herbal vegetation) or by a ring of dark higher grass (or meadow herbs). Its occuring in woods and on medows (grassland ecosystems) hole around the world. According the folks and fairy tails fairy rings are places, where at night fairies are dancing; others descibe necrotic rings as places were dragons stopped. Curent investigation shows, that this phenomenon is caused by a mass of mycelia under rings. These studyes are based on PCR methods comparing sporocarp taxa with mycelia mass structure under them. Sometimes they also compare morphotypes (this article not available) to set a species composition of this mycelial mass, which was called "shiro" by Ogawa.
In English literature we can find out a term "fairy ring fungus", which is mostly a term for Scotch bonnet (Marasmius oreades), however it is etimated that fairy rings can be caused by 50-60 Ascomycota and Basidiomycota. It should be state also that ring is just one of the shapes caused by these taxa and there is not a narow line between natural necrotic/dark green occurance and fairy ring apperiance.
Finally it is important to explain two mistakes connected with this phenomenon. Firstly what is a fairy circle? Fairy circle is another natural phenomenon of unknown origin occuring in grasslands of SW Africa. Fairy circles are not in scope of this project! Another missunderstanding is how fairy rings look like below ground. You can mostly find out diagrams describing that mass of mycelia is growing in a ring from the central point outside and dieing in the centre forming a ring of mycelial mass. This widelly know theory was not elucidated yet by scientifical studyes. However Gryndler et al. (2004) summarized the current knoweledge on the structure of a mycelial mass and this shape is one of the description in scientific papers. Another two examples were that genets formed just islands of shiro under each sporocarp, or bigger dollops in the ring which are not connected to make a hole ring.
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they only grow on the grass where cows have been
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FAIRY RING, the popular name for the circular patches of a dark green colour that are to be seen occasionally on permanent grass-land, either lawn or meadow, on which the fairies were supposed to hold their midnight revels. They mark the area of growth of some fungus, starting from a centre of one or more plants. The mycelium produced from the spores dropped by the fungus or from the "spawn" in the soil, radiates outwards, and each year's successive crop of fungi rises from the new growth round the circle. The rich colour of the grass is due to the fertilizing quality of the decaying fungi, which are peculiarly rich in nitrogenous substances. The most complete and symmetrical grass rings are formed by Marasmius oreades, the fairy ring champignon, but the mushroom and many other species occasionally form rings, both on grass-lands and in woods. Observations were made on a ring in a pine-wood for a period of nine years, and it was calculated that it increased from centre to circumference about 82 in. each year. The fungus was never found growing within the circle during the time the ring was under observation, the decaying vegetation necessary for its growth having become exhausted.