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Amanita Muscaria

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Amanita muscaria



 
 
Amanita muscaria, commonly known as the fly agaric or fly Amanita, is a poisonous and psychoactive basidiomycete fungus
Fungus

A fungus is a Eukaryote organism that is a member of the Kingdom Fungi . The fungi are a monophyletic group, also called the Eumycota , that is phylogeny distinct from the morphologically similar slime molds and water molds ....
, one of many in the genus Amanita
Amanita

The genus Amanita contains about 600 species of agarics including some of the most toxic known mushrooms found worldwide. This genus is responsible for approximately 95% of the fatalities resulting from mushroom poisoning, with the death cap accounting for about 50% on its own....
. Native throughout the temperate
Temperate

In geography, temperate or tepid latitudes of the globe lie between the tropics and the polar circles. The changes in these regions between summer and winter are generally mild, rather than extreme hot or cold....
 and boreal
Boreal ecosystem

'Boreal' is usually applied to ecosystems localized to subarctic and subantarctic zones, although Austral is also used for the latter. A "boreal forest", also known as the taiga, is the set of forest ecosystems that can survive in northern, specifically subarctic, regions....
 regions of the Northern Hemisphere, Amanita muscaria has been unintentionally introduced to many countries in the Southern Hemisphere, generally as a symbiont with pine plantations, and is now a true cosmopolitan
Cosmopolitan distribution

In biogeography, a biological category of living things is said to have cosmopolitan distribution if this category can be found almost anywhere around the world....
 species.






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Amanita muscaria, commonly known as the fly agaric or fly Amanita, is a poisonous and psychoactive basidiomycete fungus
Fungus

A fungus is a Eukaryote organism that is a member of the Kingdom Fungi . The fungi are a monophyletic group, also called the Eumycota , that is phylogeny distinct from the morphologically similar slime molds and water molds ....
, one of many in the genus Amanita
Amanita

The genus Amanita contains about 600 species of agarics including some of the most toxic known mushrooms found worldwide. This genus is responsible for approximately 95% of the fatalities resulting from mushroom poisoning, with the death cap accounting for about 50% on its own....
. Native throughout the temperate
Temperate

In geography, temperate or tepid latitudes of the globe lie between the tropics and the polar circles. The changes in these regions between summer and winter are generally mild, rather than extreme hot or cold....
 and boreal
Boreal ecosystem

'Boreal' is usually applied to ecosystems localized to subarctic and subantarctic zones, although Austral is also used for the latter. A "boreal forest", also known as the taiga, is the set of forest ecosystems that can survive in northern, specifically subarctic, regions....
 regions of the Northern Hemisphere, Amanita muscaria has been unintentionally introduced to many countries in the Southern Hemisphere, generally as a symbiont with pine plantations, and is now a true cosmopolitan
Cosmopolitan distribution

In biogeography, a biological category of living things is said to have cosmopolitan distribution if this category can be found almost anywhere around the world....
 species. It associates
Mycorrhiza

A mycorrhiza is a symbiosis association between a fungus and the roots of a plant. In a mycorrhizal association the fungus may colonize the roots of a host plant either intracellularly or extracellularly....
 with various deciduous and coniferous trees. The quintessential toadstool, it is a large white-gilled, white-spotted, usually deep red mushroom, one of the most recognizable and widely encountered in popular culture. Several subspecies, with differing cap colour have been recognised to date, including the brown regalis (considered a separate species), the yellow-orange flavivolata, guessowii, and formosa, and the pinkish persicina. Genetic studies published in 2006 and 2008 show several sharply delineated clades which may represent separate species.

Although generally considered poisonous, it has been consumed as a food in parts of Europe, Asia, and North America after parboiling in plentiful water. However, Amanita muscaria is now primarily famed for its hallucinogenic properties with its main psychoactive constituent being the compound muscimol
Muscimol

Muscimol is the major psychoactive alkaloid present in many mushrooms of the Amanita genus. Unlike psilocybin, a tryptamine, muscimol is a potent, selective agonist of the GABA A receptor receptor....
. It was used as an intoxicant and entheogen
Entheogen

An entheogen , in the strictest sense, is a psychoactive substance used in a religion or shamanism context. Historically, entheogens are derived primarily from plant sources and have been used in a variety of traditional religious contexts....
 by the peoples of Siberia and has a religious significance in these cultures. There has been much speculation on traditional use of this mushroom as an intoxicant existed beyond Siberia, however, such traditions are far less well-documented. The American banker and amateur ethnomycologist R. Gordon Wasson proposed the fly agaric was in fact the Soma
Soma

Soma , or Haoma , from Proto-Indo-Iranian *sauma-, was a ritual drink of importance among the early Indo-Iranians, and the later Vedic civilization and Greater Iran cultures....
 talked about in the ancient Rig Veda texts of India; although this theory has been refuted by anthropologists, it gained common credence when first published in 1968.

The common name in English is thought to have been derived from its European use as an insecticide
Insecticide

An insecticide is a pesticide used against insects in all developmental forms. They include ovicides and larvicides used against the Egg and larvae of insects respectively....
, when sprinkled in milk. The fly-killing agent is now known to be ibotenic acid
Ibotenic acid

Ibotenic acid is a chemical compound that is naturally occurring in the mushrooms Amanita muscaria and Amanita pantherina, among others....
. An alternative derivation proposes that the term fly- refers not to insects as such but rather the delirium
Delirium

Delirium is an acute and relatively sudden decline in attention-focus, perception, and cognition. In medical usage it is not synonymous with drowsiness, and may occur without it....
 resulting from consumption of the fungus. This is based on the medieval belief that flies could enter a person's head and cause mental illness.

Taxonomy and naming

The name of the mushroom in many European languages is derived from the fact that it was used as an insecticide
Insecticide

An insecticide is a pesticide used against insects in all developmental forms. They include ovicides and larvicides used against the Egg and larvae of insects respectively....
, when sprinkled in milk. This practice has been recorded from Germanic-
Germanic languages

The Germanic languages are a group of related languages that constitute a branch of the Indo-European languages language family. The common ancestor of all the languages in this branch is Proto-Germanic, spoken in approximately the mid-1st millennium BC in Pre-Roman Iron Age....
 (bar England) and Slavic-speaking
Slavic languages

File:Slavic europe.svgThe Slavic languages , a group of closely related languages of the Slavic peoples and a subgroup of Indo-European languages, have speakers in most of Eastern Europe, in much of the Balkans, in parts of Central Europe, and in the northern part of Asia....
 parts of Europe, as well as the Vosges
Vosges mountains

For the department of France of the same name, see Vosges.The Vosges are a range of low mountains in eastern France, near its border with Germany....
 region and pockets elsewhere in France, and Romania. Albertus Magnus
Albertus Magnus

Saint Albertus Magnus, Ordo Praedicatorum , also known as Saint Albert the Great and Albert of Cologne, was a Dominican Order Dominican friar and bishop who achieved fame for his comprehensive knowledge of and advocacy for the peaceful Relationship between religion and science....
 was the first to record it in his work De vegetabilibus sometime before 1256, commenting:

The 16th century Flemish botanist Carolus Clusius traced the practice to Frankfurt
Frankfurt

is the largest city in the German States of Germany of Hesse and the List of cities in Germany with more than 100,000 inhabitants in Germany, with a 2008 population of 670,000....
 in Germany, while Carl Linnaeus, the "father of taxonomy", reported it from Småland
Småland

is a historical Provinces of Sweden in southern Sweden.Sm?land borders Blekinge, Scania or Sk?ne, Halland, V?sterg?tland, ?sterg?tland and the island ?land in the Baltic Sea....
 in southern Sweden where he had lived as a child. He officially described it in Volume Two of his Species Plantarum
Species Plantarum

Species Plantarum was first published in 1753, as a two-volume work by Carl Linnaeus. Its prime importance is perhaps that it is the primary starting point of botanical nomenclature as it exists today....
 in 1753, giving it the name Agaricus muscarius, the specific epithet deriving from Latin
Latin

Latin is an Italic language, historically spoken in Latium and Ancient Rome. Through the Military history of the Roman Empire, Latin spread throughout the Mediterranean and a large part of Europe....
 musca meaning "fly". It gained its current name in 1783, when placed in the genus Amanita
Amanita

The genus Amanita contains about 600 species of agarics including some of the most toxic known mushrooms found worldwide. This genus is responsible for approximately 95% of the fatalities resulting from mushroom poisoning, with the death cap accounting for about 50% on its own....
 by Jean-Baptiste Lamarck
Jean-Baptiste Lamarck

Jean-Baptiste Pierre Antoine de Monet, Chevalier de la Marck, usually known as Lamarck, was a France soldier, natural history, academia and an early proponent of the idea that evolution occurred and proceeded in accordance with Naturalism ....
 and sanctioned by Elias Magnus Fries
Elias Magnus Fries

Elias Magnus Fries was a Sweden mycologist and botanist born at Femsj? in Sm?land....
.

The starting date had been formerly set as January 1 1821, the date of the works of the "father of mycology", Swedish naturalist Elias Magnus Fries
Elias Magnus Fries

Elias Magnus Fries was a Sweden mycologist and botanist born at Femsj? in Sm?land....
, and under these conditions, the full name was Amanita muscaria (L.:Fr.) Hook.
William Jackson Hooker

Sir William Jackson Hooker, Fellow of the Royal Society was an English botany....
. However, a recent revision of the International Code of Botanical Nomenclature
International Code of Botanical Nomenclature

The International Code of Botanical Nomenclature is the set of rules and recommendations dealing with the formal botanical names that are given to plants....
 in 1987 changed the rules regarding the starting date and primary work for names of fungi, and now names can be considered valid as far back as May 1 1753, the date of publication of Linnaeus's seminal work. Hence, Linnaeus and Lamarck became the namers of the Amanita muscaria (L.) Lam.

English mycologist John Ramsbottom
John Ramsbottom (mycologist)

John Ramsbottom was a British mycology. He was Keeper of Botany at the British Museum . He served as general secretary and twice as president of the British Mycological Society, and was long editor of its Transactions....
 reported that Amanita muscaria was used for getting rid of bugs in England and Sweden, and bug agaric was an old alternate name. French mycologist Pierre Bulliard
Jean Baptiste François Pierre Bulliard

Jean Baptiste Fran?ois Pierre Bulliard was a French physician and botanist.Bulliard studied in Langres, afterwards in Clairvaux and in Paris....
 tried to replicate its fly-killing properties without success in his work Histoire des plantes vénéneuses et suspectes de la France, and proposed a new binomial name Agaricus pseudo-aurantiacus because of this. One compound isolated from the fungus is 1,3-diolein, which is in fact an insect attractor.

An alternative derivation proposes that the term fly- refers not to insects as such but rather the delirium
Delirium

Delirium is an acute and relatively sudden decline in attention-focus, perception, and cognition. In medical usage it is not synonymous with drowsiness, and may occur without it....
 resulting from consumption of the fungus
Fungus

A fungus is a Eukaryote organism that is a member of the Kingdom Fungi . The fungi are a monophyletic group, also called the Eumycota , that is phylogeny distinct from the morphologically similar slime molds and water molds ....
. This is based on the medieval belief that flies could enter a person's head and cause mental illness. Several regional names appear to be linked with this connotation, meaning either "mad-" or "fool's" Amanita caesarea. Hence there is oriol foll "mad oriol" in Catalan
Catalan language

Catalan is a Romance languages, the national language and official language of Andorra, and a official language in the Autonomous Communities of Spain of the Balearic Islands, Catalonia and Valencian Community and in the city of Alghero in the Italy List of islands in the Mediterranean of Sardinia....
, mujolo folo from Toulouse
Toulouse

Toulouse is a commune of France in southwest France on the banks of the Garonne, half-way between the Atlantic Ocean and the Mediterranean Sea....
, concourlo fouolo from the Aveyron
Aveyron

Aveyron is a departments of France in southern France named after the Aveyron River....
 department in Southern France, ovolo matto from the Province of Trento
Province of Trento

The Province of Trento , often referred simply as Trentino, is an Autonomous area Provinces of Italy of Italy. In the local languages, typically the word Trentin is used....
 in Italy. A local dialect name in Fribourg
Fribourg

Fribourg , is the capital of the Switzerland Cantons of Switzerland of Fribourg and the district of Sarine . It is located on both sides of the river Saane/Sarine, on the Swiss plateau, and is an important economic, administrative and educational center on the cultural border between German speaking part of Switzerland and French Switzerla...
 in Switzerland is tsapi de diablhou, which translates as "Devil's hat".

The word toadstool in English does not refer to any particular species, yet it has a more definite specific connotation with A. muscaria in continental Europe. Yet another name is crapaudin in many parts of France, and a Basque
Basque language

Basque is the language spoken by the Basque people who inhabit the Pyrenees in North-Central Spain and the adjoining region of South-Western France....
 term from Guipúzcoa and Biscay
Biscay

Biscay is a province of the Basque Country in Spain.It is generally accepted that Bizkaia, the original Basque term, means something like 'mountain' or 'cliff'....
 is amoroto, all alluding to toads. The toad is thought to be associated with the mushroom because it symbolizes toxicity and chthonic
Chthonic

Chthonic designates, or pertains to, deities or spirits of the underworld, especially in relation to Ancient Greek religion.Greek khthon is one of several words for "earth"; it typically refers to the interior of the soil, rather than the living surface of the Landscape or the land as territory ....
 forces in the same way that the serpent
Serpent (symbolism)

Serpent is a word of Latin origin that is commonly used in a specifically mythology or religion context, signifying a snake that is to be regarded not as a mundane natural phenomenon nor as an object of scientific zoology, but as the bearer of some symbolic value....
 does. Wasson proposed this was due to its being a shamanic and also taboo
Taboo

A taboo is a strong social prohibition against words, objects, actions, or discussions that are considered undesirable or offensive by a group, culture, society, or community....
 object and hence unable to be named specifically in ancient Celtic culture. He speculates that the power of this taboo may have perpetuated its maligned reputation while other lethal fungi such as the death cap (A. phalloides) have had few cultural connotations throughout European history. In addition, a common name from China is ha-ma chün, meaning "toad mushroom", although the toad does not carry a negative connotation in Chinese culture and symbolism. An unusual derivation is the Japanese beni-tengu-take "long-nosed goblin-mushroom".

Classification

]]Amanita muscaria is the type species
Type species

In taxonomy, a type species is the species that originally defined a genus . It is an individual specimen that fixes the name of a genus . Two different definitions are used interchangeably, in a general term and a botanical term....
 of the genus Amanita. By extension, it is also the type species of Amanita subgenus
Subgenus

In biology, a subgenus is a taxonomic rank directly below genus. See rank and rank .In ICZN, a subgeneric name can be used independently or included in a binomen, in parentheses, placed between the name of a biological genus and specific name: e.g....
 Amanita, as well as section Amanita within this subgenus. Amanita subgenus Amanita includes all Amanita with inamyloid spores. Amanita section
Section (botany)

In botany, a section is a low-level taxonomic rank directly below subgenus. See rank and rank . It is typically used to help organize very large genus, which may have hundreds of species....
 Amanita includes those species with patchy universal veil
Universal veil

The universal veil is a Mycology term to describe a structure that envelops all or most of some gilled mushrooms. The young, developing Agaricus bisporus, which may resemble a puffball at this point, is protected by this egg-like structure....
 remnants, including a volva that is reduced to a series of concentric rings and the veil remnants on the cap
Pileus (mycology)

The pileus is the technical name for what is commonly known as the cap of a fungal fruiting body. It is particularly characteristic of agarics, boletes, and some polypores, tooth fungi, and ascocarps....
 being a series of patches or warts. Most species in this group also have a bulbous base. Amanita section Amanita consists of A. muscaria and its close relatives, including A. pantherina (the panther cap), A. gemmata
Amanita gemmata

The gemmed mushroom is a mushroom of the genus Amanita, a genus of fungi including some of the most deadly mushrooms, as well as notably psychedelic mushrooms....
, A. farinosa
Amanita farinosa

Amanita farinosa is a North American poisonous mushroom of the genus Amanita, a genus of fungi including some of the most deadly mushrooms, as well as notably psychedelic mushrooms....
, and A. xanthocephala
Amanita xanthocephala

The vermilion grisette, also known as pretty grisette or vermilion Amanita is a colourful mushroom of the genus Amanita. It is important to note, however, that although it is often referred to by the common name "grisette", it is not closely related to other edible species that carry this common name, such as Amanita va...
. Modern fungal taxonomists have classified Amanita muscaria and its allies this way based on gross morphology
Morphology (biology)

The term morphology in biology refers to form, structure and configuration of an organism. This includes aspects of the outward appearance as well as the form and structure of the internal parts like bones and organs....
 and spore inamyloidy. Two recent molecular phylogenetic studies have confirmed this classification as natural.

Amanita muscaria varies considerably in its morphology and many authorities recognize a number of subspecies or varieties within the species. In The Agaricales in Modern Taxonomy, German mycologist Rolf Singer
Rolf Singer

Rolf Singer was a Germany-born mycologist and one of the most important taxonomy of gilled mushrooms in the 20th century.After receiving his Ph.D....
 listed three subspecies, though without description: A. muscaria ssp. muscaria, A. muscaria ssp. americana, and A. muscaria ssp. flavivolvata.

Contemporary authorities recognize up to seven varieties:
  • var. muscaria, the typical red-and-white spotted variety. Some authorities, such as Rodham Tulloss, only use this name for Eurasian and western Alaskan populations.
  • var. flavivolvata is red, with yellow to yellowish-white warts, and occurs in the western regions of the North American continent, from southern Alaska down through the Rocky Mountains
    Rocky Mountains

    The Rocky Mountains, often called the Rockies, are a mountain range in western North America. The Rocky Mountains stretch more than 4,800 kilometre from the northernmost part of British Columbia, in Canada, to New Mexico, in the United States....
    , through Central America
    Central America

    Central America is a central geography region of the Americas. It is the southernmost, isthmus portion of the North American continent, which connects with South America on the southeast....
    , to at least Andean Colombia
    Colombia

    Colombia , officially the Republic of Colombia , is a country in north-western South America. Colombia is bordered to the east by Venezuela and Brazil; to the south by Ecuador and Peru; to the north by the Caribbean Sea; to the north west by Panama; and to the west by the Pacific Ocean....
    . Rodham Tulloss uses this name to describe all "typical" A. muscaria from indigenous New World populations from Alaska southward.
  • var. alba, an uncommon fungus, has a white to silvery white cap with white warts but otherwise similar to the usual form.
  • var. formosa, has a yellow to orange-yellow cap with yellowish or tan warts and stem. Some authorities use this name for all A. muscaria fitting this description worldwide (cf, Jenkins), others (cf, Tulloss) restrict its use to Eurasian populations.
Amanita Muscaria Americana
* var. guessowii is yellow to orange, with center of cap more orange or reddish orange than the outer part. It is found throughout North America, but is most common in northeastern North America, from Newfoundland
Newfoundland and Labrador

Newfoundland and Labrador is a Provinces and territories of Canada of Canada, on the country's Atlantic Ocean coast in northeastern North America....
 and Quebec
Quebec

Quebec , in French language, Qu?bec , is a Provinces and territories of Canada in the Central Canada and Eastern Canada regions of Canada....
 down to Tennessee
Tennessee

Tennessee is a U.S. state located in the Southern United States United States. In 1796, it became the sixteenth state to join the United States....
. Some authorities (cf, Jenkins) treat these populations as part of A. muscaria var. formosa, while others (cf, Tulloss) recognize it as a distinct variety.
  • var. persicina is pinkish to orangish "melon" colored with poorly formed or absent remnants of universal veil on the stem and vasal bulb, known from the Southeastern Coastal areas of the U.S.A, described in 1977.
  • var. regalis from Scandinavia
    Scandinavia

    Scandinavia is a historical and geographical subregion in northern Europe that includes the Scandinavian Peninsula. It consists of the kingdoms of Norway, Sweden, and Denmark; some authorities also include Finland and some might even include Iceland....
     and Alaska
    Alaska

    Alaska is the largest U.S. state of the United States by area; it is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait....
    , is liver-brown and has yellow warts. It appears to be uniformly distinctive and some authorities (cf, Tulloss) treat it as a separate species, while others (cf, Jenkins) treat it as a variety of A. muscaria.


A 2006 molecular phylogenetic study of different regional populations of A. muscaria by mycologist József Geml and colleagues found three distinct clades within this species representing, roughly, Eurasian, Eurasian "subalpine", and North American populations. Specimens belonging to all three clades have been found in Alaska; this has led to the hypothesis that this was the center of diversification of this species. The study also looked at four named varieties of this species: var. alba, var. flavivolvata, var. formosa (including var. guessowii), and var. regalis from both areas. All four varieties were found within both the Eurasian and North American clades, evidence that these morphological forms are simply polymorphisms
Polymorphism (biology)

Polymorphism in biology occurs when two or more clearly different phenotypes exist in the same population of a species ? in other words, the occurrence of more than one form or morph....
 found throughout the species rather than distinct subspecies or varieties. Further molecular study by Geml and colleagues published in 2008 show these three genetic groups, plus a fourth associated with oak–hickory–pine forest in the southeastern United States, and two more on Santa Cruz Island in California, are delineated from each other enough genetically to be considered separate species; thus A. muscaria as it stands currently is a species complex
Cryptic species complex

In biology, a cryptic species complex is a group of species which satisfy the biological definition of species, that is, they are reproductively isolated from each other, but their morphology is very similar ....
. The complex also includes at least three other closely related taxa currently regarded as species: A. breckonii is a buff-capped mushroom associated with conifers from the Pacific Northwest, and the brown-capped A. gioiosa and A. heterochroma from the mediterranean and Sardinia alone respectively. Both these last two are found with Eucalyptus
Eucalyptus

Eucalyptus is a diverse genus of Flowering plant trees in the Myrtus family, Myrtaceae. Members of the genus dominate the tree flora of Australia....
 and Cistus
Cistus

Cistus is a genus of flowering plants in the rockrose family Cistaceae, containing about 20 species . They are Perennial plant shrubs found on dry or rocky soils throughout the Mediterranean region, from Morocco and Portugal through to the Middle East, and also on the Canary Islands....
 trees and it is unclear whether they are native or have been introduced from Australia.

Description

, New Zealand
New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses , and numerous Islands of New Zealand, most notably Stewart Island/Rakiura and the Chatham Islands....
, with a distinctive ring
Annulus (mycology)

An annulus is the ring like structure sometimes found on the Stipe of a mushroom. The annulus represents the remaining part of the partial veil, after it has ruptured to expose the gill s or other spore-producing surface....
]] A large conspicuous mushroom
Mushroom

A mushroom is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground on soil or on its food source. The standard for the name "mushroom" is the cultivated white button mushroom, Agaricus bisporus, hence the word mushroom is most often applied to those fungi that have a stem , a cap , and gills on the unde...
, Amanita muscaria is generally common and numerous where it grows, and is often found in groups with basidiocarp
Basidiocarp

A basidiocarp, basidiome or basidioma , is the sporocarp of a basidiomycete, the multi-cellular structure on which the spore-producing hymenium is borne....
s in all stages of development. Fly agaric fruiting bodies emerge from the soil looking like a white egg, covered in the white warty material of the universal veil. Dissecting the mushroom at this stage will reveal a characteristic yellowish layer of skin under the veil which assists in identification. As the fungus grows, the red color appears through the broken veil and the warts become less prominent; they do not change in size but are reduced relative to the expanding skin area. The cap changes from globose to hemispherical, and finally to plate-like and flat in mature specimens. Fully grown, the bright red cap
Pileus (mycology)

The pileus is the technical name for what is commonly known as the cap of a fungal fruiting body. It is particularly characteristic of agarics, boletes, and some polypores, tooth fungi, and ascocarps....
 is usually around 8–20 cm (3–8 in) in diameter, although larger specimens have been found. The red color may fade after rain and in older mushrooms. After emerging from the ground, the cap is covered with numerous small white to yellow pyramid-shaped warts. These are remnants of the universal veil
Universal veil

The universal veil is a Mycology term to describe a structure that envelops all or most of some gilled mushrooms. The young, developing Agaricus bisporus, which may resemble a puffball at this point, is protected by this egg-like structure....
, a membrane that encloses the entire mushroom when it is still very young. The free gills are white, as is the spore print
Spore print

The spore print of a mushroom is an important diagnostic character in most handbooks for identifying mushrooms. It shows the color of the mushroom spores if viewed en masse....
. The oval spores measure 9–13 by 6.5–9 µm
Micrometre

A micrometre or micron is one Micro- of a metre, or equivalently one thousandth of a millimetre. It is also commonly known as a micron....
, and are non-amyloid
Amyloid (mycology)

In mycology the term amyloid refers to a crude chemical test using iodine in either Melzer's reagent or Lugol's solution, to produce a black to blue-black positive reaction....
, that is, they do not turn blue with the application of iodine
Melzer's Reagent

Melzer's reagent is a chemical reagent used by mycologists to assist with the identification of fungi....
. The stipe
Stipe (mycology)

In mycology a stipe refers to the stem or stalk-like feature supporting the pileus of a mushroom. Like all tissues of the mushroom other than the hymenium, the stipe is composed of sterile hyphae tissue....
 is white, 5–20 cm high (2–8 in) by 1–2 cm (0.4–0.8 in) wide, and has the slightly brittle, fibrous texture typical of many large mushrooms. At the base is a bulb
Volva (mycology)

The volva is a Mycology term to describe a cup-like structure at the base of a mushroom which is a remnant of the Universal veil. This Macroscopicfeature is very important in wild mushroom identification due to it being an easily observed, taxonomically significant feature which almost always signifies a member of Amanitaceae....
 that bears universal veil remnants in the form of two to four distinct rings or ruffs. Between the basal universal veil remnants and gills are remnants of the partial veil
Partial veil

Partial veil is a mycology term which describes a structure of some mushrooms which protects the developing gill or other spore-producing surface....
 (which covers the gills during development) in the form of a white ring
Annulus (mycology)

An annulus is the ring like structure sometimes found on the Stipe of a mushroom. The annulus represents the remaining part of the partial veil, after it has ruptured to expose the gill s or other spore-producing surface....
. It can be quite wide and flaccid with age. There is generally no associated smell other than a mild earthiness.

Although very distinctive in appearance, the fly agaric has been mistaken for other yellow to red species in the Americas, including Armillaria cf. mellea and the edible Amanita basii—a Mexican species similar to A. caesarea
Amanita caesarea

Amanita caesarea, commonly known in English as Caesar's Mushroom, is a highly regarded edible mushroom in the genus Amanita, native to southern Europe and North Africa....
 of Europe. Poison control centers in the U.S. and Canada are aware that amarill is a common name for A. caesarea-like species in Mexico, not just the Spanish for 'yellow'. Amanita caesarea can be distinguished as it has an entire orange red cap, lacking the numerous white warty spots of the fly agaric. Furthermore the stem, gills and ring are bright yellow, not white. Finally the volva is a distinct white bag, not broken into scales. In Australia, the introduced fly agaric may be confused with the native vermilion grisette (Amanita xanthocephala
Amanita xanthocephala

The vermilion grisette, also known as pretty grisette or vermilion Amanita is a colourful mushroom of the genus Amanita. It is important to note, however, that although it is often referred to by the common name "grisette", it is not closely related to other edible species that carry this common name, such as Amanita va...
), which grows in association with eucalypts. The latter species generally lacks the white warts of A. muscaria and bears no ring.

Distribution and habitat


A. muscaria is a cosmopolitan
Cosmopolitan distribution

In biogeography, a biological category of living things is said to have cosmopolitan distribution if this category can be found almost anywhere around the world....
 mushroom, native to conifer and deciduous woodlands throughout the temperate
Temperate

In geography, temperate or tepid latitudes of the globe lie between the tropics and the polar circles. The changes in these regions between summer and winter are generally mild, rather than extreme hot or cold....
 and boreal
Boreal ecosystem

'Boreal' is usually applied to ecosystems localized to subarctic and subantarctic zones, although Austral is also used for the latter. A "boreal forest", also known as the taiga, is the set of forest ecosystems that can survive in northern, specifically subarctic, regions....
 regions of the Northern Hemisphere, including high elevations of warmer latitudes in regions like the Hindu Kush
Hindu Kush

The Hindu Kush is a mountain range located in eastern and central Afghanistan, northwestern Pakistan and northeastern India.The origin of the name Hindu Kush is disputed, despite its coinage apparently dating back no further than c.1330....
, the Mediterranean and Central America. A recent molecular study proposes an ancestral origin in the Siberia
Siberia

Siberia , is the name given to the vast region constituting almost all of North Asia and for the most part currently serving as the massive central and eastern portion of the Russian Federation, having served in the same capacity previously for the Soviet Union from its beginning, and the Russian Empire beginning in the 16th century....
n–Beringian region in the Tertiary
Tertiary

The Tertiary is a a term for a Geologic time scale#Terminology 65 million to 1.8 million years ago. The Tertiary covered the time span between the superseded Secondary period and an out-of-date definition of the Neogene#Controversy....
 period before radiating outwards across Asia, Europe and North America. Though generally encountered in autumn, the season can vary in different climates: fruiting occurs in summer and autumn across most of North America, but later in autumn and early winter on the Pacific coast
Pacific Coast

A country's Pacific coast is the part of its coast facing the Pacific Ocean....
. It is often found in similar locations to Boletus edulis
Boletus edulis

Boletus edulis is an edible basidiomycete mushroom. Most commonly known as porcini , it has a number of common names, including cep , king bolete and penny bun....
, and may appear in fairy ring
Fairy ring

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....
s. Conveyed with pine seedlings, it has been widely transported into the southern hemisphere, including Australia, New Zealand
New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses , and numerous Islands of New Zealand, most notably Stewart Island/Rakiura and the Chatham Islands....
, South Africa and South America.

Ectomycorrhizal
Mycorrhiza

A mycorrhiza is a symbiosis association between a fungus and the roots of a plant. In a mycorrhizal association the fungus may colonize the roots of a host plant either intracellularly or extracellularly....
, Amanita muscaria forms symbiotic relationships with a wide variety of trees, including pine
Pine

Pines are Pinophyta trees in the genus Pinus, in the family Pinaceae. They make up the monotypic subfamily Pinoideae. There are about 115 species of pine, although different authorities accept between 105 and 125 species....
, spruce
Spruce

A spruce is a tree of the genus Picea, a genus of about 35 species of coniferous evergreen trees in the Family Pinaceae, found in the northern temperate and boreal regions of the earth....
, fir
Fir

Firs are a genus of between 45-55 species of evergreen Pinophyta in the family Pinaceae. All are trees, reaching heights of 10-80 m tall and trunk diameters of 0.5-4 m when mature....
, birch
Birch

Birch is the name of any tree of the genus Betula , in the family Betulaceae, closely related to the beech/oak family, Fagaceae....
, and cedar
Cedar

Cedar is a genus of coniferous trees in the plant family Pinaceae. They are most closely related to the Firs , sharing a very similar cone structure....
. Commonly seen under introduced trees, A. muscaria is the fungal equivalent of a weed
WEED

WEED is a radio station broadcasting a Gospel format. Licensed to Rocky Mount, North Carolina, USA, it serves the area. The station is currently owned by Northstar Broadcasting Corporation....
 in New Zealand
New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses , and numerous Islands of New Zealand, most notably Stewart Island/Rakiura and the Chatham Islands....
, Tasmania
Tasmania

Tasmania is an Australian island and States and territories of Australia of the same name. It is located south of the eastern side of the continent, being separated from it by Bass Strait....
 and Victoria
Victoria (Australia)

File:Map Victoria Aboriginal tribes .jpgVictoria is a States and territories of Australia located in the southeastern corner of Australia. It is the smallest mainland state in area but the most Population density and urbanised....
, forming new associations with southern beech (Nothofagus
Nothofagus

Nothofagus, also known as the southern beeches, is a genus of about 35 species of trees and shrub native to the temperate oceanic to tropical Southern Hemisphere in southern South America and Australasia ....
). It is also invading native rainforest in Australia, where it may be displacing native species. Furthermore, it appears to be spreading northwards, with recent reports placing it near Port Macquarie
Port Macquarie, New South Wales

Port Macquarie is a large town on the mid-North Coast, New South Wales, Australia, located about 390 km north of Sydney, and 570 km south of Brisbane....
 on the New South Wales
New South Wales

New South Wales is Australia's oldest and most populous States and territories of Australia, located in the south-east of the country, north of Victoria and south of Queensland....
 north coast. Although it has not spread to eucalypts in Australia, it has been recorded associating with them in Portugal.

Toxicity

Amanita muscaria poisoning typically occurs in either young children or people ingesting it for a hallucinogenic experience. Occasionally, immature button forms have been mistaken for edible puffball
Puffball

A puffball is a member of any of a number of groups of fungi in the division Basidiomycota. The puffballs were previously treated as a taxonomic group called the Gasteromycetes or Gasteromycetidae, but they are now known to be a polyphyletic assemblage....
s. Additionally, the white spots may be washed away during heavy rain and it can then appear similar to the edible A. caesarea
Amanita caesarea

Amanita caesarea, commonly known in English as Caesar's Mushroom, is a highly regarded edible mushroom in the genus Amanita, native to southern Europe and North Africa....
.

Amanita muscaria contains a number of biologically active agents, at least two of which, muscimol
Muscimol

Muscimol is the major psychoactive alkaloid present in many mushrooms of the Amanita genus. Unlike psilocybin, a tryptamine, muscimol is a potent, selective agonist of the GABA A receptor receptor....
 and ibotenic acid
Ibotenic acid

Ibotenic acid is a chemical compound that is naturally occurring in the mushrooms Amanita muscaria and Amanita pantherina, among others....
, are known to be psychoactive. A toxic dose in adults is approximately 6 mg muscimol or 30 to 60 mg ibotenic acid, this is typically about the amount found in one cap of Amanita muscaria. However, the amount and ratio of chemical compounds per mushroom varies widely from region to region and season to season, which further confuses the issue. Spring and summer mushrooms have been reported to contain up to 10 times as much ibotenic acid and muscimol compared to autumn fruitings. Ibotenic acid has shown to be highly neurotoxic
Neurotoxin

A neurotoxin is a toxin that acts specifically on nerve cells , usually by interacting with membrane proteins such as ion channels.Some sources are more general, and define the effect of neurotoxins as occurring at nerve tissue....
 when injected directly into the brains of mice and rats.

A fatal dose has been calculated at approximately 15 caps. Deaths from A. muscaria have been reported in historical journal articles and newspaper reports; however, with modern medical treatment a fatal outcome would be extremely rare. Many older books mistakenly list it as deadly, giving the impression that it is far more toxic than it really is. The vast majority of mushroom poisoning
Mushroom poisoning

Mushroom poisoning, also known as mycetism, refers to deleterious effects from ingestion of toxic substances present in a mushroom. These symptoms can vary from slight Gastrointestinal tract discomfort to death....
 fatalities (90% or more) are from having eaten either the greenish to yellowish death cap (A. phalloides) or one of the several white Amanita species known as destroying angel
Destroying angel

The name destroying angel applies to several similar, closely related species of deadly all-white mushrooms in the genus Amanita. They are Amanita bisporigera and Amanita ocreata in eastern and western North America, and Amanita virosa in Europe....
s.

The active constituents of this species are water soluble, and boiling and then discarding the cooking water will at least partly detoxify A. muscaria. However, drying may increase potency as the process facilitates the conversion of ibotenic acid to the more potent muscimol. According to some sources, once detoxified, the mushroom becomes edible.

Pharmacology

Muscarine
Muscarine

Muscarine, L--muscarine, or muscarin is a Secondary metabolite found in certain mushrooms, particularly in Inocybe and Clitocybe species, such as the deadly Clitocybe dealbata....
, discovered in 1869, was long thought to be the active hallucinogenic agent in A. muscaria. Muscarine binds with muscarinic acetylcholine receptor
Muscarinic acetylcholine receptor

Muscarinic receptors, or mAChRs, are G protein-coupled receptor acetylcholine receptors found in the plasma membranes of certain neurons and other Cell s....
s leading to the excitation of neurons bearing these receptors. The levels in Amanita muscaria, however, are minute when compared with other poisonous fungi, such as Inocybe erubescens or small white Clitocybe
Clitocybe

Hundreds of species of mushrooms compose the genus Clitocybe. They are characterized by white, off-white, buff, cream, pink, or light-yellow spores, gills running down the stem, and pale white to brown or lilac coloration....
 species C. dealbata
Clitocybe dealbata

Clitocybe dealbata, also known as the ivory funnel, is a small white funnel-shaped toadstool widely found in lawns, meadows and other grassy areas in Europe and North America....
 and C. rivulosa
Clitocybe rivulosa

Clitocybe rivulosa, commonly known as the false champignon or fool's funnel, is a poisonous basidiomycete fungus of the large genus Clitocybe....
, and are too insignificant to play a role in the symptoms of poisoning. , a principal psychoactive agent in A. muscaria]] The major toxins involved in poisoning are muscimol
Muscimol

Muscimol is the major psychoactive alkaloid present in many mushrooms of the Amanita genus. Unlike psilocybin, a tryptamine, muscimol is a potent, selective agonist of the GABA A receptor receptor....
 (3-hydroxy-5-aminomethyl-1-isoxazole, an unsaturated
Unsaturated compound

In organic chemistry, an unsaturated compound is a chemical compound that contains carbon-carbon double bonds or triple bonds such as in alkenes or alkynes....
 cyclic hydroxamic acid
Hydroxamic acid

A hydroxamic acid is a class of chemical compounds sharing the same functional group in which an hydroxylamine is inserted into an carboxylic acid....
) and ibotenic acid
Ibotenic acid

Ibotenic acid is a chemical compound that is naturally occurring in the mushrooms Amanita muscaria and Amanita pantherina, among others....
. Muscimol is the product of the decarboxylation
Decarboxylation

Decarboxylation is any chemical reaction in which a carboxyl group is split off from a compound as carbon dioxide ....
 or drying of ibotenic acid. Muscimol and ibotenic acid were discovered in the mid 20th century. Researchers in England, Japan, and Switzerland showed that the effects produced were due mainly to ibotenic acid and muscimol, not muscarine.

Ibotenic acid and muscimol are structurally related to each other and to two major neurotransmitter
Neurotransmitter

Neurotransmitters are chemistry which relay, amplify and modulate signals between a neuron and another cell . Neurotransmitters are packaged into vesicles that cluster beneath the membrane on the presynaptic side of a synapse, and are released into the synaptic cleft, where they bind to receptors in the membrane on the postsynaptic side of...
s of the central nervous system: glutamic acid
Glutamic acid

Glutamic acid is one of the 20 proteinogenic amino acids and its codons are GAA and GAG. It is a non-essential amino acid. The carboxylate anions and salt of glutamic acid are known as glutamates....
 and GABA
Gabâ

Gab? or gabaa, for the Cebuano people , is the concept of a non-human and non-divine, imminent Retributive justice. A sort of negative karma, it is generally seen as an evil effect on a person because of their wrongdoings or transgressions....
 respectively. Ibotenic acid and muscimol act like these neurotransmitters, muscimol being a potent GABAA
GABA A receptor

The GABAA receptor is one of two Ligand-gated ion channel ion channels responsible for mediating the effects of gamma-aminobutyric acid , the major inhibitory neurotransmitter in the brain....
 agonist
Agonist

An agonist is a term used to describe a type of Ligand or drug that binds and alters the activity of a Receptor . The ability to alter the activity of a receptor, also known as the agonist's efficacy is a property that distinguishes it from receptor antagonist, a type of receptor ligand which also binds a receptor but which does not alter t...
, while ibotenic acid is an agonist of NMDA glutamate receptors
NMDA receptor

The NMDA receptor is an ionotropic receptor for glutamate . Activation of NMDA receptors results in the opening of an ion channel that is nonselective to ion....
 and certain metabotropic glutamate receptor
Metabotropic glutamate receptor

The metabotropic glutamate receptors, or mGluRs, are a type of glutamate receptor which are active through an indirect metabotropic receptor process....
s which are involved in the control of neuronal activity. It is these interactions which are thought to cause the psychoactive effects found in intoxication. Following ingestion some of the ibotenic acid is metabolized to muscimol which would appear to be the agent responsible for the majority of the psychoactivity.

Muscazone
Muscazone

Muscazone is a toxic psychoactive chemical compound. It is an amino acid found in European Amanita muscaria mushrooms....
 is another compound more recently isolated from European specimens of the fly agaric. It is a product of the breakdown of ibotenic acid by ultra-violet radiation. Muscazone is of minor pharmacological activity
Biological activity

Pharmacological or biological activity is an expression describing the beneficial or adverse effects of a drug on organism. When the drug is a complex chemical mixture, this activity is exerted by the substance's active ingredient or pharmacophore but can be modified by the other constituents....
 compared with the other agents. Amanita muscaria and related species are known as effective bioaccumulators
Bioaccumulation

Bioaccumulation refers to the accumulation of substances, such as pesticides, or other organic chemicals in an organism. Bioaccumulation occurs when an organism absorbs a toxin at a rate greater than that at which the substance is lost....
 of vanadium
Vanadium

Vanadium is the chemical element with the symbol V and atomic number 23. It is a soft, silvery grey, ductile transition metal. The formation of an oxide layer stabilizes the metal against oxidation....
; some species concentrate vanadium to levels of up to 400 times those typically found in plants. Vanadium is present in fruit-bodies as an organometallic
Organometallic chemistry

Organometallic chemistry is the study of chemical compounds containing chemical bonding between carbon and a metal. Since many compounds without such bonds are chemically similar, an alternative may be compounds containing metal-element bonds of a largely covalent character....
 compound called amavadine. However, the biological importance of the accumulation process is unknown.

Symptoms

Fly agarics are known for the unpredictability of their effects. Depending on habitat and the amount ingested per body weight, effects can range from nausea
Nausea

Nausea is the sensation of unease and discomfort in the stomach with an urge to vomit....
 and twitching to drowsiness, cholinergic crisis
Cholinergic crisis

A cholinergic crisis is an over-stimulation at a neuromuscular junction due to an excess of acetylcholine , as of a result of the inactivity of the AChE enzyme, which normally breaks down acetylcholine....
-like effects (low blood pressure
Blood pressure

Blood pressure is the pressure exerted by circulating blood on the walls of blood vessels, and constitutes one of the principal vital signs. The pressure of the circulating blood decreases as it moves away from the heart through artery and capillary, and toward the heart through veins....
, sweat
SWEAT

SWEAT is an OLN/The Sports Network television program hosted by Julie Zwillich that aired in 2003-2004.Each of the 13 half-hour episodes of SWEAT features a different outdoor sport: kayaking, mountain biking, ice hockey, beach volleyball, soccer, windsurfing, Sport rowing, Ultimate , triathlon, wakeboarding, snowboarding, telemark skiin...
ing and saliva
Saliva

Saliva is the watery and usually frothy substance produced in the mouths of humans and most other animals. Saliva is produced in and secreted from the salivary glands....
tion), auditory and visual distortions, mood changes, euphoria
Euphoria (emotion)

Euphoria is medically recognized as an emotional and mental state defined as a sense of great happiness and quality_of_life. Technically, euphoria is an affect , but the term is often colloquially used to define emotion as an intense, Wiktionary:transcendent happiness combined with an overwhelming sense of well-being....
, relaxation, ataxia
Ataxia

Ataxia is a neurology sign and symptom consisting of gross lack of coordination of muscle movements. Ataxia is a non-specific clinical manifestation implying dysfunction of parts of the nervous system that coordinate movement, such as the cerebellum....
, and loss of equilibrium
Vertigo (medical)

Vertigo is a specific type of dizziness, a major symptom of a balance disorder. It is the sensation of spinning or swaying while the body is actually stationary with respect to the surroundings....
.

In cases of serious poisoning it causes a delirium
Delirium

Delirium is an acute and relatively sudden decline in attention-focus, perception, and cognition. In medical usage it is not synonymous with drowsiness, and may occur without it....
, similar in effect to anticholinergic
Anticholinergic

An anticholinergic agent is a substance that blocks the neurotransmitter acetylcholine in the central nervous system and the peripheral nervous system....
 poisoning it is characterized by bouts of marked agitation
Psychomotor agitation

Psychomotor agitation is a series of unintentional and purposeless motions that stem from mental tension and Anxiety of an individual. This includes pacing around a room, wringing one's hands, pulling off clothing and putting it back on and other similar actions....
 with confusion, hallucinations, and irritability followed by periods of central nervous system
Central nervous system

The central nervous system is the part of the nervous system that functions to coordinate the activity of all parts of the bodies of multicellular organisms....
 depression. Seizures and coma
Coma

In medicine, a coma is a profound state of unconsciousness. A comatose person cannot be awakened, fails to respond normally to pain or light, does not have sleep-wake cycles, and does not take voluntary actions....
 may also occur in severe poisonings. Symptoms typically appear after around 30 to 90 minutes and peak within three hours, but certain effects can last for a number of days. In the majority of cases recovery is complete within 12 to 24 hours. The effect is highly variable between individuals with similar doses potentially causing quite different reactions. Some cases of intoxication have exhibited headaches up to ten hours afterwards. Retrograde amnesia
Amnèsia

Amn?sia is an Italian language drama film directed by Gabriele Salvatores in 2002 in film.External links...
 and somnolence
Somnolence

Somnolence is a state of near-sleep, a strong desire for sleep, or sleeping for unusually long periods . It has two distinct meanings, referring both to the usual state preceding falling asleep, and the chronic condition referring to being in that state independent of a circadian rhythm....
 frequently results following recovery.

Treatment

Medical attention should be sought in cases of suspected poisoning. Initial treatment consists of gastric decontamination. If the delay between ingestion and treatment is less than four hours, activated charcoal is given. Gastric lavage
Gastric lavage

Gastric lavage, also commonly called stomach pumping or Gastric irrigation, is the process of cleaning out the contents of the stomach....
 can be considered if the patient presents within 1 hour of ingestion. Inducing vomiting with syrup of ipecac
Syrup of ipecac

Syrup of ipecac commonly referred to as simply Ipecac is derived from the dried rhizome and roots of the ipecacuanha plant and is a well known emetic ....
 is no longer recommended in any poisoning situations.

There is no antidote, and supportive care is the mainstay of further treatment for intoxication. Patients can develop symptoms similar to anticholinergic
Anticholinergic

An anticholinergic agent is a substance that blocks the neurotransmitter acetylcholine in the central nervous system and the peripheral nervous system....
 or cholinergic
Cholinergic crisis

A cholinergic crisis is an over-stimulation at a neuromuscular junction due to an excess of acetylcholine , as of a result of the inactivity of the AChE enzyme, which normally breaks down acetylcholine....
 poisoning; however, the use of atropine
Atropine

Atropine is a tropane alkaloid extracted from deadly nightshade , jimsonweed , Mandrake and other plants of the family Solanaceae. It is a secondary metabolite of these plants and serves as a hard drug with a wide variety of effects....
 or physostigmine
Physostigmine

Physostigmine is a parasympathomimetic, specifically, a reversible cholinesterase inhibitor alkaloid of the Calabar bean.The chemical was synthesized for the first time in 1935 by the chemists Percy Lavon Julian and Josef Pikl....
 as an antidote is not recommended as muscimol and ibotenic acid do not produce a true anticholinergic syndrome nor do they have activity at muscarinic receptors. If a patient is delirious
Delirium

Delirium is an acute and relatively sudden decline in attention-focus, perception, and cognition. In medical usage it is not synonymous with drowsiness, and may occur without it....
 or agitated, this can usually be treated by reassurance and, if necessary, physical restraints. Additionally, benzodiazepine
Benzodiazepine

The benzodiazepines are a class of psychoactive drugs with varying hypnotic, sedative, anxiolytic , anticonvulsant, muscle relaxant and anterograde amnesia properties, which are mediated by slowing down the central nervous system....
 such as diazepam
Diazepam

Diazepam , first marketed as Valium by Hoffmann-La Roche, is a benzodiazepine derivative drug. It possesses anxiolytic, anticonvulsant, hypnotic, sedative, skeletal muscle relaxant and amnestic properties....
 or lorazepam
Lorazepam

Lorazepam, initially marketed under the brand names Ativan and Temesta, is a benzodiazepine drug with short to medium duration of action....
 can be used to control combativeness, agitation, muscular overactivity, and seizures. However, small doses of benzodiazepines should be used as they may worsen the respiratory depressant effects of muscimol. Recurrent vomiting is rare but if present may lead to fluid and electrolyte imbalances; intravenous rehydration or electrolyte replacement may be required. Serious cases may develop loss of consciousness
Consciousness

Consciousness is a difficult term to define, because the word is used and understood in a wide variety of ways, so that it frequently happens that what one person sees as a definition of consciousness is seen by others as about something else altogether....
 or coma
Coma

In medicine, a coma is a profound state of unconsciousness. A comatose person cannot be awakened, fails to respond normally to pain or light, does not have sleep-wake cycles, and does not take voluntary actions....
, and may necessitate intubation
Intubation

In medicine, intubation refers to the placement of a tube into an external or internal orifice of the body. Although the term can refer to endoscopy procedures, it is most often used to denote tracheal intubation....
 and artificial ventilation. Hemodialysis
Hemodialysis

File:Plugged into dialysis.jpgIn medicine, hemodialysis is a method for removing waste products such as potassium and urea, as well as free water from the blood when the kidneys are in renal failure....
 can remove the toxins, although this intervention is generally considered unnecessary. With modern medical treatment the prognosis is typically good following supportive treatment.

Psychoactive use

Basket of Amanita Muscaria
Unlike the hallucinogenic mushrooms of the Psilocybe
Psilocybe

Psilocybe is a genus of small mushrooms growing worldwide. This genus is best known for its species with Psychedelic drug properties, widely known as "psychedelic mushroom", though the majority of species do not contain hallucinogenic compounds....
, Amanita muscaria has been rarely consumed recreationally. However, following the outlawing of psilocybin
Psilocybin

Psilocybin is a psychedelic drug indole of the tryptamine family, found in psilocybin mushrooms. It is present in List of Psilocybin mushrooms of fungi, including those of the genus Psilocybe, such as Psilocybe cubensis and liberty cap , but also reportedly isolated from a dozen or so other genera....
-containing mushrooms in the United Kingdom, an increased quantity of legal A. muscaria mushrooms began to be sold and consumed.

In eastern Siberia, the shaman
Shamanism

Shamanism is a range of traditional beliefs and practices concerned with communication with the spirit world. A practitioner of shamanism is known as a shaman, , noun ....
 would consume the mushrooms, and others would drink his urine. This urine, still containing active hallucinogens may actually be more potent than the A. muscaria mushrooms with fewer negative effects, such as sweating and twitching, suggesting that the initial user may act as a screening filter for other components in the mushroom. Among the Koryak, one report held the poor would consume the urine of the wealthy, who could afford to buy the mushrooms.

Siberia

A. muscaria was widely used as a hallucinogenic drug by many of the indigenous peoples of Siberia. Its use was known among almost all of the Uralic-speaking peoples of western Siberia and the Paleosiberian-speaking peoples of the Russian Far East
Russian Far East

Russian Far East is a term that refers to the Russian part of the Far East, i.e., extreme east parts of Russia, between Siberia and the Pacific Ocean....
. However, there are only isolated reports of A. muscaria use among the Tungusic
Tungusic peoples

The term Tungusic peoples is used to describe peoples speaking a Tungusic languages....
 and Turkic peoples
Turkic peoples

The Turkic peoples are Eurasian peoples residing in northern, central and western Eurasia, and who mostly speak languages belonging to the Turkic languages....
 of central Siberia and it is believed that hallucinogenic use of A. muscaria was largely not a practice of these peoples. In western Siberia, the use of A. muscaria was restricted to shamans, who used it as an alternate method of achieving a trance state. (Normally, Siberian shamans achieve a trance state by prolonged drumming and dancing.) In eastern Siberia, A. muscaria was used by both shamans and laypeople alike, and was used recreationally as well as religiously.

The Koryak
Koryaks

Koryaks are an indigenous people of Kamchatka Krai in the Russian Far East, who inhabit the coastlands of the Bering Sea to the south of the Anadyr River basin and the country to the immediate north of the Kamchatka Peninsula, the southernmost limit of their range being Tigilsk....
 of eastern Siberia have a story about the fly agaric (wapaq) which enabled Big Raven to carry a whale to its home. In the story, the deity Vahiyinin ("Existence") spat onto earth, and his spittle became the wapaq, and his saliva becomes the warts. After experiencing the power of the wapaq, Raven was so exhilarated that he told it to grow forever on earth so his children, the people, can learn from it.

Other reports of entheogenic use

Beyond Siberia, there are only isolated and unconfirmed reports of the hallucinogenic use of A. muscaria. The Finnish historian T. I. Itkonen
T. I. Itkonen

Toivo Immanuel Itkonen was a Finland historian and linguist, specializing in Sami language and the history of the Sami people.References...
 mentions that it was once used among the Sami people
Sami people

The S?mi people, are the indigenous people Indigenous peoples of Europe inhabiting S?pmi , which today encompasses parts of northern Sweden, Norway, Finland and the Kola Peninsula of Russia....
, sorcerers in Inari
Inari, Finland

Inari is a municipalities of Finland in Finland. The municipality was established in 1876. The largest villages of the municipality are Ivalo and Inari ....
 would consume fly agarics with seven spots. In 1979, Said Gholam Mochtar and Hartmut Geerken
Hartmut Geerken

Hartmut Geerken is a Germans musician, composer, writer, journalist, playwright, and filmmaker....
 published an article in which they claim to have discovered a tradition of recreational use of this mushroom among a Parachi-speaking group in Afghanistan
Afghanistan

Afghanistan , officially the Islamic republic of Afghanistan, is a landlocked country that is located approximately in the center of Asia....
. There are also unconfirmed reports of religious use of A. muscaria among two Subarctic Native American
Indigenous peoples of the Americas

The indigenous peoples of the Americas are the pre-Columbian inhabitants of the Americas, their descendants, and many ethnic groups who identify with those peoples....
 tribes. Ojibwa
Ojibwa

The Ojibwa or Chippewa is the largest group of Native Americans in the United States-First Nations north of Mexico, including M?tis people ....
 ethnobotanist Keewaydinoquay Peschel
Keewaydinoquay Peschel

Keewaydinoquay Pakawakuk Peschel was a scholar, ethnobotanist, herbalist, medicine woman, teacher and author. She was an Anishinaabeg Elder of the Doodem....
 reported its use among her people, where it was known as the miskwedo. This information was enthusiastically received by Wasson, although evidence from other sources was lacking. There is also one account of a Euro-American who claims to have been initiated into traditional Tlicho use of Amanita muscaria.

Soma


In 1968, R. Gordon Wasson's proposed that A. muscaria was the Soma
Soma

Soma , or Haoma , from Proto-Indo-Iranian *sauma-, was a ritual drink of importance among the early Indo-Iranians, and the later Vedic civilization and Greater Iran cultures....
 talked about in the Rig Veda of India
India

India, officially the Republic of India , is a country in South Asia. It is the List of countries and outlying territories by total area country by geographical area, the List of countries by population country, and the most populous liberal democracy in the world....
, which received widespread publicity and popular support at the time. He noted that descriptions of Soma omitted description of roots, stems or seeds, which suggested a mushroom, and used the adjective hári "dazzling" or "flaming" which the author interprets as red. One line described men urinating Soma; this recalled the practice of recycling urine in Siberia. Soma is mentioned as coming "from the mountains", which Wasson interpreted as being brought with the Aryan invaders from the north. However, Indian scholars Santosh Kumar Dash and Sachinanda Padhy noted that both the eating of mushrooms and drinking of urine were proscribed, using as a source the Manusm?ti. In 1971, Vedic scholar John Brough from Cambridge University rejected Wasson's theory; he noted the language was too vague to determine a description of Soma.

Vikings

A single source for the notion that viking
Viking

A Viking is one of the Norsemen explorers, warriors, merchants, and Piracy who raided and colonized wide areas of Europe from the late eighth to the early eleventh century....
s used A. muscaria to produce their berserker
Berserker

Berserkers were Norsemen warriors who wore coats of wolf or bear skin and were commonly understood to have fought in an uncontrollable rage or trance of fury, hence the modern word berserk....
 rages was first suggested by the Swedish professor Samuel Ödman in 1784. Ödman based his theories on reports about the use of fly agaric among Siberian shamans. The notion has become widespread since the 19th century, but no contemporary sources mention this use or anything similar in their description of berserkers. Today, it is generally considered an urban legend or at best speculation that cannot be proven. Muscimol is generally a mild relaxant, but could create a range of reactions within a range of people. It is possible that it could make a person incredibly angry, as well as make them "very jolly or sad, jump about, dance, sing or give way to great fright".

Christianity

Biblical scholar John Marco Allegro
John Marco Allegro

John Marco Allegro was a scholar who challenged orthodox views of the Dead Sea Scrolls, the Bible and the history of religion, with books that attracted popular attention and scholarly derision....
 controversially proposed that the Roman Theology was derived from a sex and psychedelic mushroom cult in his 1970 book The Sacred Mushroom and the Cross, although his theory has found little support by scholars outside the field of ethnomycology
Ethnomycology

Ethnomycology is the study of the historical uses and sociological impact of fungi , and can be considered a subfield of ethnobotany or ethnobiology....
. The book was roundly discredited by academics and theologians, including Sir Godfrey Driver
Godfrey Rolles Driver

Godfrey Rolles Driver was an England Orientalist noted for his studies of Semitic languages and Assyriology.Driver was born in Oxford, England, son of the noted English Biblical studies Samuel Rolles Driver, and educated at Winchester College and New College, Oxford where he won the Pusey and Ellerton and Senior Kennicott Hebrew Scholarsh...
, Emeritus Professor of Semitic Philology at Oxford University, and Henry Chadwick
Henry Chadwick (theologian)

Henry Chadwick Order of the British Empire was a United Kingdom academic and Church of England clergyman. A former Dean of Christ Church Cathedral, Oxford ? and as such also head of Christ Church, Oxford, University of Oxford ? he also served as Master of Peterhouse, University of Cambridge, becoming the first person in four centuries to ha...
, the Dean of Christ Church College, Oxford. Christian author John C. King wrote a detailed rebuttal of Allegro's theory in the 1970 book A Christian View of the Mushroom Myth; he notes neither fly agarics nor their host trees are found in the middle east, and highlights the tenuous nature of the links between biblical and Sumerian names coined by Allegro. He concludes that if the theory was true, the use of the mushroom must have been "the best kept secret in the world" as it was so well concealed for all this time.

In Magic Mushrooms in Religion and Alchemy (formerly called Strange Fruit) Clark Heinrich interprets A. muscaria usage by Adam and Eve
Adam and Eve

Adam and Eve are the First man or woman created by God in the Hebrew creation story told in Genesis 1-2....
, Moses
Moses

Moses is a Hebrew Bible Hebrews religious leader, lawgiver, prophet, to whom the Mosaic authorship of the Torah is traditionally attributed. Also called Moshe Rabbeinu in Hebrew , he is the most important prophet in Judaism, and also an important prophet of Christianity, Islam, the Bah?'? Faith, Rastafari movement, Chrislam and many ot...
, Elijah and Elisha
Elisha

Elisha is a Biblical prophet. In Greek and Latin, he is known as Saint Eliseus; however, the standard English form of the name has been "Elisha," at least since the introduction of the King James Version of the Bible....
, Isaiah
Isaiah

Isaiah is the main figure in the Biblical Book of Isaiah, and is traditionally considered to be its author. He was an 8th-century Before Christ Judean prophet who declared that all the world belonged to God and that God will destroy it....
, Ezekiel
Ezekiel

This article is about the main speaker in the biblical Book of Ezekiel. For a summary and analysis of the book itself, see Book of Ezekiel.According to religious texts, Ezekiel was a prophet and priest in the Hebrew Bible who prophesied for 22 years sometime in the 6th century BC in the form of visions while exiled in Babylon, as recorded...
, Jonah
Jonah

According to the Hebrew Bible and Arab Qur'an, Jonah was a prophet who was swallowed by a great fish....
, Jesus
Jesus

Jesus of Nazareth , also known as Jesus Christ, is the central figure of Christianity and is revered by most Christian churches as the Son of God and the Incarnation ....
 and his disciples, and John of Patmos
John of Patmos

John of Patmos is the name given to the author of the Book of Revelation in the New Testament. According to the text of Revelation, the author, who gives his name as "John," is living on the Greek island of Patmos....
. In the book Apples of Apollo the mushroom is identified in a wide range of mythological tales such as those involving Perseus
Perseus

Perseus , the legendary founder of Mycenae and of the Mycenae there, was the first of the mythic heroes of Greek mythology whose exploits in defeating various archaic monsters provided the founding myths in the cult of the Twelve Olympians....
, Prometheus
Prometheus

In Greek mythology, Prometheus is a Titan known for his wily intelligence, who stole fire from Zeus and gave it to human beings for their use....
, Heracles
Heracles

In Greek mythology, Heracles or Herakles meaning "glory of Hera", or "Glorious through Hera" Alcides or Alcaeus " was a hero, the son of Zeus and Alcmene, foster son of Amphitryon and great-grandson of Perseus....
, Jason and the Argonauts
Jason

Jason was a late ancient Greece Greek mythology figure, famous as the leader of the Argonauts and their quest for the Golden Fleece. He was the son of Aeson, the rightful king of Iolcus....
, Jesus and the Holy Grail
Holy Grail

According to Christian mythology, the Holy Grail was the dish, plate, or cup used by Jesus at the Last Supper, said to possess miraculous powers....
.

Culinary use

The toxins in A. muscaria are water soluble. When sliced thinly, or chopped into thin dice and boiled in plentiful water until thoroughly cooked, it seems to be detoxified. Although its consumption as a food has never been widespread, the consumption of detoxified A. muscaria has been practiced in some localities in Europe (notably by Russian settlers in Siberia) since at least the 19th century, and likely earlier. The German physician and naturalist Georg Heinrich von Langsdorff wrote the earliest published account on how to detoxify this mushroom in 1823. In the late 19th Century, the French physician Félix Archimède Pouchet
Félix Archimède Pouchet

F?lix-Archim?de Pouchet was a French naturalist and a leading proponent of spontaneous generation of life from from non-living materials, and as such an opponent of Louis Pasteur?s germ theory....
 was a popularizer and advocate of A. muscaria consumption, comparing it to manioc, an important food source in tropical South America that nevertheless must be detoxified before consumption.

Use of this mushroom as a food source also seems to have existed in North America as well. A classic description of this use of A. muscaria by an African-American mushroom seller in Washington D.C. in the late nineteenth century is described by American botanist Frederick Vernon Coville
Frederick Vernon Coville

Frederick Vernon Coville was an American botanist who careered in the United States Department of Agriculture , where he became Chief Botanist, and was the first director of the United States National Arboretum....
. In this case, the mushroom, after parboiling, and soaking in vinegar is made into a mushroom sauce for steak. It is also consumed as a food in parts of Japan. The most well-known current use as an edible mushroom is in Nagano Prefecture
Nagano Prefecture

is a Prefectures of Japan of Japan located in the Chubu region of the island of Honshu. The capital is the city of Nagano, Nagano....
, Japan. There, it is primarily salted and pickled.

A 2008 paper by mycologist David Arora
David Arora

David Arora is an United States mycologist, naturalist, and writer. He is the author of two popular mushroom field guides, Mushrooms Demystified and All That the Rain Promises and More.......
 and food historian William Rubel gives a history of consumption of A. muscaria as a food and describes detoxification methods. They advocate that Amanita muscaria be described in field guides as an edible mushroom, though accompanied by a description on how to detoxify it. The authors state that the widespread descriptions in field guides of this mushroom as poisonous is a reflection of cultural bias
Cultural bias

Cultural bias is when someone is biased due to his or her culture. The alleged problem of cultural bias is sometimes said to be central to social and human sciences, such as economics, psychology, anthropology and sociology....
, as several other popular edible species, notably morels, are toxic unless properly cooked.

Cultural depictions

's 1851 painting Ruebezahl features fly agarics.]] The red-and-white spotted toadstool is a common image in many aspects of popular culture, especially in children's books, film, garden ornaments, greeting cards, and more recently computer games. Garden ornaments, and children's picture books depicting gnome
Gnome

A gnome is a mythical creature characterized by its extremely small size and wiktionary:subterranean lifestyle. The word gnome is derived from the New Latin gnomus....
s and fairies, such as the Smurfs, very often show fly agarics used as seats, or homes. Fly agarics have been featured in paintings since the Renaissance
Renaissance

The Renaissance was a cultural movement that spanned roughly the 14th to the 17th century, beginning in Italy in the late Middle Ages and later spreading to the rest of Europe....
, albeit in a subtle manner. In the Victorian era
Victorian era

The Victorian Era of the United Kingdom of Great Britain and Ireland was the period of Victoria of the United Kingdom reign from June 1837 to January 1901....
 they became more visible, even becoming the main topic of some fairy painting
Fairy painting

Fairy painting is a genre of painting and illustration featuring fairies and fairy tale settings, often with extreme attention to detail. The genre is most closely associated with the Victorian era in United Kingdom of Great Britain and Ireland, but has experienced a contemporary revival....
s. Two of the most famous uses of the mushroom are in the video game series Super Mario Bros., and the dancing mushroom sequence in the 1940 Disney film Fantasia
Fantasia (film)

Fantasia is a 1940 in film List of animated feature-length films produced by Walt Disney, and is the third film in the List of Disney theatrical animated features#official canon....
.

Literature

The journeys of Philip von Strahlenberg
Philip Johan von Strahlenberg

Philip Johan von Strahlenberg was a Sweden Officer and geographer of Germans origin who made important contributions to the cartography of Russia....
 to Siberia and his descriptions of the use of the mukhomor there was published in English in 1736. The drinking of urine of those who had imbibed the mushroom was commented on by Anglo-Irish writer Oliver Goldsmith
Oliver Goldsmith

Oliver Goldsmith was an Anglo-Irish writer, poet, and physician known for his novel The Vicar of Wakefield , his pastoral poem The Deserted Village , and his plays The Good-Natur'd Man and She Stoops to Conquer ....
 in his widely-read 1762 novel Citizen of the World. The mushroom had been identified as the fly agaric by this time. Other authors recorded the distortions of the size of perceived objects while intoxicated by the fungus, including naturalist Mordecai Cubitt Cooke
Mordecai Cubitt Cooke

Mordecai Cubitt Cooke was an England botanist and mycologist.Cooke came from a mercantile family in Horning, Norfolk, and worked as an apprentice to a fabric merchant before becoming a clerk in a law firm, but his chief interest was in botany....
 in his books The Seven Sisters of Sleep and A Plain and Easy Account of British Fungi. This observation is thought to have formed the basis of the effects of eating the mushroom in the 1865 popular story Alice's Adventures in Wonderland
Alice's Adventures in Wonderland

Alice's Adventures in Wonderland is a novel written by England author Charles Lutwidge Dodgson under the pseudonym Lewis Carroll. It tells the story of a girl named Alice who falls down a Rabbit hole into a fantasy world populated by peculiar and anthropomorphic creatures....
. A hallucinogenic "scarlet toadstool" from Lappland is also featured as a plot element in Charles Kingsley
Charles Kingsley

Charles Kingsley was an England university professor, historian, and novelist, particularly associated with the West Country and north-east Hampshire....
's 1866 novel Hereward the Wake based on the medieval figure
Hereward the Wake

Hereward the Wake , known in his own times as Hereward the Outlaw or Hereward the Exile, was an 11th-century Anglo-Saxons leader involved in resistance to the Norman conquest of England....
 of the same name; fly agaric shamanism is explored more recently in the 2003 novel Thursbitch
Thursbitch

Thursbitch is a novel by English writer Alan Garner, named after the valley in the Pennines of England where the action occurs . It was published in 2003....
 by Alan Garner
Alan Garner

Alan Garner Order of the British Empire is an English writer whose work is firmly rooted in Cheshire....
.

Christmas decorations and Santa Claus

Fly agarics appear on Christmas cards and New Year
New Year

The New Year is an event that happens when a culture celebrates the end of one year and the beginning of the next year. Cultures that measure yearly calendars all have New Year celebrations....
 cards from around the world as a symbol of good luck
Luck

Luck is a chance happening, or that which happens beyond a person's control. Luck can be good or bad ....
. The ethnobotanist Jonathan Ott
Jonathan Ott

Jonathan Ott is an ethnobotany, writer, natural products chemist and botanical researcher in the area of entheogens and their cultural and historical uses....
 has suggested that the idea of Santa Claus
Santa Claus

Santa Claus is a folklore figure in various cultures who distributes gifts to children, normally on Christmas Eve. Each name is a variation of Saint Nicholas, but refers to Santa Claus....
 and tradition of hanging stockings over the fireplace is based centrally upon the fly agaric mushroom itself. With its generally red and white color scheme, he argues that Santa Claus's suit is related to the mushroom. He also draws parallels with flying reindeer: reindeer had been reported to consume the mushroom and prance around in an intoxicated manner afterwards. American ethnopharmacologist Scott Hajicek-Dobberstein, researching possible links between religious myths and the red mushroom, notes, "If Santa Claus had but one eye [like Odin
Odin

Odin , is considered the chief ?sir in Norse paganism. Homologous with the Anglo-Saxons Woden and the Old High German Wotan, it is descended from Proto-Germanic *Wodanaz or *Wodanaz....
], or if magic urine
Amanita muscaria

Amanita muscaria, commonly known as the fly agaric or fly Amanita, is a poisonous and psychoactive basidiomycete fungus, one of many in the genus Amanita....
 had been a part of his legend, his connection to the Amanita muscaria would be much easier to believe."

The connection was reported to a much wider audience with an article in the magazine
The Sunday Times Magazine

The Sunday Times Magazine is a supplement to the Sunday Times newspaper. It was launched in 1962, and in November 2008 was redesigned....
 of The Sunday Times
The Sunday Times

The Sunday Times is a British Sunday newspaper.The Sunday Times may also refer to:*The Sunday Times *The Sunday Times *The Sunday Times ...
 in 1980, and New Scientist
New Scientist

New Scientist is a liberal weekly international science magazine and website covering recent developments in science and technology for a general English language-speaking audience....
 in 1986. Historian Ronald Hutton has since ruled out the connection; he noted reindeer spirits did not appear in Siberian mythology, shamans did not travel by sleigh, nor did they wear red and white, or climb out of smoke holes in yurt
Yurt

A yurt is a portable, felt-covered, wood latticework-framed dwelling structure used by nomads in the steppes of Central Asia....
 roofs. Finally, American awareness of Siberian shamanism postdated the appearance of much of the folklore around Santa.

See also

  • List of Amanita species
    List of Amanita species

    The following is a list of some notable species of the agaric genus Amanita. This genus contains over 500 named species and varieties, so the list is far from exhaustive....


Cited texts


External links

  • documentary on Google Video