Omphalotus olearius

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Omphalotus olearius
Omphalotus olearius.JPG
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Omphalotaceae
Genus: Omphalotus
Species:
O. olearius
Binomial name
Omphalotus olearius
(DC.) Sing. (1948)
Synonyms [1]
  • Agaricus oleariusDC. (1815)
  • Agaricus olearius subsp. phosphoreusBattarra ex Pers. (1828)
  • Dryophila phosphorea(Battarra ex Pers.) Quél. (1888)
  • Clitocybe olearia(DC.) Maire (1933)
  • Clitocybe phosphorea(Battarra ex Pers.) Bohus (1957)
Omphalotus olearus from South Africa Omphalotus olearus.png
Omphalotus olearus from South Africa

Omphalotus olearius, [2] commonly known as the jack-o'-lantern mushroom, is a poisonous orange gilled mushroom that to an untrained eye appears similar to some chanterelles. It is notable for its bioluminescent properties. It is found in woodland areas in Europe, where it grows on decaying stumps, on buried roots or at the base of hardwood trees. It has also been reported from the Western Cape Province, South Africa. A similar, but phylogenetically distinct [3] species found in eastern North America is Omphalotus illudens .

Contents

Unlike chanterelles, Omphalotus olearius and other Omphalotus species contain the toxin illudin S, and are poisonous to humans. While not lethal, consuming this mushroom leads to very severe cramps, vomiting, and diarrhea.

Description

The jack-o'-lantern mushroom is orange. Its bioluminescence, a blue-green color, can be observed in fresh specimens in low light conditions once the eye becomes dark-adapted. The whole mushroom does not glow—only the gills do so. This is due to an enzyme called luciferase, acting upon a compound called luciferin, leading to the emission of light much as fireflies do when glowing. [4]

Omphalotus olearius
Information icon.svg
Gills icon.png Gills on hymenium
Infundibuliform cap icon.svg Cap is infundibuliform
Decurrent gills icon2.svg Hymenium is decurrent
Bare stipe icon.svg Stipe is bare
Transparent spore print icon.svg
Spore print is yellow
Saprotrophic fungus.svgEcology is saprotrophic
Mycomorphbox Poison.pngEdibility is poisonous

Similar species

Unlike chanterelles, jack-o'-lantern mushrooms have true, sharp, non-forking gills; this is possibly the simplest trait for distinguishing between the two. Furthermore, if the jack-o'-lantern's stem is peeled, the inside is orange, while the chanterelle is paler inside the stem.

Omphalotus illudens of eastern North America, and the Western jack-o'-lantern mushroom Omphalotus olivascens common in southern to central California, are both poisonous. The similarly poisonous mushroom Tsukiyotake ( Omphalotus japonicus , formerly known as Lampteromyces japonicus, found in Japan and eastern Asia, is also bioluminescent and contains the same poison, illudin. [3]

See also

Related Research Articles

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<i>Cantharellus</i> Genus of fungi

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<i>Cantharellus cibarius</i> Species of fungus

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<i>Omphalotus illudens</i> Species of fungus

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<i>Omphalotus</i> Genus of fungi

Omphalotus is a genus of basidiomycete mushroom, in the family Omphalotaceae, formally circumscribed by Victor Fayod in 1889. Members have the traditional cap and stem structure. They are saprobic, and fruit in clumps on the ground, adjacent to host trees. The best known and type species is the jack-o'-lantern mushroom (Omphalotus olearius). Species of Omphalotus have been mistaken for chanterelles. All Omphalotus species are presumed poisonous, causing gastrointestinal symptoms. Some Omphalotus species have bioluminescent properties.

<span class="mw-page-title-main">Acylfulvene</span> Chemical compound

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<i>Omphalotus nidiformis</i> Species of bioluminescent fungus in the family Marasmiaceae

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<i>Cantharellus lateritius</i> Species of fungus

Cantharellus lateritius, commonly known as the smooth chanterelle, is a species of edible fungus in the mushroom family Cantharellaceae. An ectomycorrhizal species, it is found in Asia, Africa, and North America. The species has a complex taxonomic history, and has undergone several name changes since its first description by American mycologist Lewis David de Schweinitz in 1822. The fruit bodies of the fungus are brightly colored yellow to orange, and usually highly conspicuous against the soil in which they are found. At maturity, the mushroom resembles a filled funnel with the spore-bearing surface along the sloping outer sides. The texture of the fertile undersurface (hymenium) of the caps is a distinguishing characteristic of the species: unlike the well-known golden chanterelle, the hymenium of C. lateritius is much smoother. Chemical analysis has revealed the presence of several carotenoid compounds in the fruit bodies.

<i>Cantharellus formosus</i> Species of fungus

Cantharellus formosus, commonly known as the Pacific golden chanterelle, is a fungus native to the Pacific Northwest region of North America. It is a member of the genus Cantharellus along with other popular edible chanterelles. It was distinguished from the similar C. cibarius of Europe in the 1990s. It is orange to yellow, meaty and funnel-shaped. On the underside of the smooth cap, it has gill-like ridges that run down onto its stipe, which tapers down seamlessly from the cap. The false gills often have a pinkish hue. It has a mild, sweet odor. It is solitary to gregarious in coniferous forests, fruiting from July to December.

<i>Cantharellus californicus</i> Species of fungus

Cantharellus californicus, sometimes called the mud puppy or oak chanterelle, is a fungus native to California, United States. It is a member of the genus Cantharellus along with other popular edible chanterelles. It is generally similar in appearance to C. cibarius and C. formosus except for its large size at maturity; individual specimens larger than 1 kilogram (2.2 lb), or greater, are reported, making it the largest known species of chanterelle. Their unusual size is due in part to their capacity for indeterminate growth, making Cantharellus californicus specimens actively grow for far longer than most other mushrooms.

Jack o' lantern mushroom is a common name for several fungus species in the genus Omphalotus:

<i>Omphalotus olivascens</i> Species of fungus

Omphalotus olivascens, commonly known as the western jack-o'-lantern mushroom, is an orange to brown-colored gilled mushroom native to California and Mexico.

<i>Omphalotus japonicus</i> Species of fungus

Omphalotus japonicus, commonly known as the tsukiyotake(月夜茸), is an orange to brown-colored gilled mushroom native to Japan and Eastern Asia. It is a member of the cosmopolitan genus Omphalotus, the members of which have bioluminescent fruit bodies which glow in darkness. A 2004 molecular study shows it to be most closely related to a clade composed of Omphalotus nidiformis of Australia, Omphalotus olivascens of Western North America and Omphalotus olearius of Europe.

References

  1. "Synonymy: Omphalotus olearius (DC.) Singer". Species Fungorum. CAB International. Retrieved 2015-09-24.
  2. Singer R (1948) In: Pap. Mich. Acad. Sci. 32: 133 ('1946').
  3. 1 2 Kirchmair M, Morandell S, Stolz D, Pöder R, Sturmbauer C (2004). "Phylogeny of the genus Omphalotus based on nuclear ribosomal DNA-sequences" (PDF). Mycologia. 96 (6): 1253–60. doi:10.2307/3762142. JSTOR   3762142. PMID   21148949 . Retrieved 2010-05-26.
  4. Oliveira AG, Desjardin DE, Perry BA, Stevani CV (2012). "Evidence that a single bioluminescent system is shared by all known bioluminescent fungal lineages". Photochemical and Photobiological Sciences. 11 (5): 848–852. doi: 10.1039/c2pp25032b . PMID   22495263.