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Fly Agaric

Amanita muscaria
(L.:Fr.) Lam.
Matamosca
Mata-moscas

Family: Amanitaceae
Order: Agaricales
Class: Agaricomycetes
Phylum / Division: Basidiomycota
Kingdom: Fungi

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Records from San Martin de los Andes

DANGEROUS

Other common names: Falsa Oronja.


Description: It is a highly recognizable mushroom due to its bright red cap with white warts, an iconic feature in popular imagery. The fruiting body displays a cap ranging from orange to vivid red, covered with remnants of the universal veil forming white patches. The stem is white, cylindrical, and sturdy, featuring a well-defined ring and a bulbous base with a volva. The gills are white, free, and crowded, producing white spores. As it matures, the cap flattens and may lose some warts due to rainfall.

Geographic distribution: This species is widely distributed across temperate and boreal regions of the Northern Hemisphere, including Europe, Asia, and North America. It has also been introduced into the Southern Hemisphere, such as South America and Oceania, often associated with non-native tree plantations. In regions like Argentina, it is commonly found in pine and birch forests. The species corresponds to Amanita muscaria.

Habitat: It grows mainly in coniferous and deciduous forests, forming symbiotic relationships with tree roots through mycorrhizae. It prefers acidic, well-drained soils and typically appears in autumn, although in colder climates it may fruit in late summer. It is often found in moist, shaded environments, sometimes in scattered groups.

Feeding: As a mycorrhizal fungus, it obtains nutrients through a mutualistic relationship with plants, exchanging minerals and water for carbohydrates produced by the host tree. This nutritional strategy is essential for forest ecosystems, enhancing nutrient uptake and contributing to soil dynamics.

Toxicity: It contains psychoactive and toxic compounds, mainly ibotenic acid and muscimol, which affect the central nervous system. Ingestion can cause nausea, vomiting, confusion, hallucinations, drowsiness, and motor disturbances. Although it is rarely fatal, its consumption is considered unsafe and not suitable for eating. The severity of effects varies depending on dosage, preparation, and individual sensitivity.

Reproduction: It reproduces via spores, which are released from the gills and dispersed by the wind. When they germinate under suitable conditions, they form a mycelium that can eventually produce new fruiting bodies. The development of the mushroom is regulated by complex environmental cues.

Conservation status: It is generally considered of least concern, given its wide distribution. However, local populations may be affected by habitat loss and changes in forest composition.


Author of this compilation: EcoRegistros – 04/12/2026




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Last published photographs

Foto
Photography ID: 581881
♂ ♀
  Button stage

San Martin de los Andes
Neuquén
Argentina
04/18/2024
Hernán Tolosa



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
202738818/04/2024ArgentinaNeuquénLaguna Rosales, San Martin de los AndesJorgelina Lopez
202738018/04/2024ArgentinaNeuquénLaguna Rosales, San Martin de los AndesHernán Tolosa
Page 1

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Citation recommended:

EcoRegistros. 2026. Fly Agaric (Amanita muscaria) - Species sheet. Acceded from https://www.ecoregistros.org on 15/04/2026.