Omphalotus olearius | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Fungi |
Division: | Basidiomycota |
Class: | Agaricomycetes |
Order: | Agaricales |
Family: | Omphalotaceae |
Genus: | Omphalotus |
Species: | O. olearius |
Binomial name | |
Omphalotus olearius | |
Synonyms [1] | |
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. A similar, but phylogenetically distinct [3] species found in eastern North America is Omphalotus illudens .
Unlike chanterelles, Omphalotus olearius and other Omphalotus species contain the toxin illudin S, and are poisonous to humans. While not typically lethal, consuming this mushroom leads to very severe cramps, vomiting, and diarrhea. [4] [5]
Omphalotus olearius is the same shade of orange internally and externally. It does not change color when bruised or sliced, a feature which helps to distinguish it from visibly similar species. [6] 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. [7] Bioluminescence has been shown to aid in the reproduction of fungi by attracting insects to them to spread spores. [8] However, the jack-o'-lantern mushroom does not use bioluminescence for the purpose of attracting insects, and studies on it have not yet determined the exact purpose of bioluminescence in this species. [9]
Identifiable characteristics of the jack-o'-lantern mushroom include true, sharp, decurrent, non-forking gills. [10] The smell of these mushrooms is non-distinctive. Cap size can range from 4-12 cm in diameter. The jack-o'-lantern stem can vary between 1-2 cm (0.4-0.8 in) in thickness and 3.5-9 cm (1.2-3.5 in) in total length from attachment to cap to base of stem. [11]
Omphalotus olearius are an uncommon find and can be seen in the summer and fall seasons (July-October) in regions of southern Europe. This range includes southern France, the Iberian Peninsula, and other Mediterranean countries. [12] This species has also been reported from the Western Cape Province, South Africa. [2] Clusters of jack-o'-lantern mushrooms can be found in forests that contain primarily deciduous trees. The roots, decaying stumps, and bases of hardwoods are their preferred habitat, particularly on the decaying roots of olive trees. [12] [13]
Omphalotus olearius | |
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Gills on hymenium | |
Cap is infundibuliform | |
Hymenium is decurrent | |
Stipe is bare | |
Spore print is yellow | |
Ecology is saprotrophic | |
Edibility is poisonous |
Several species of chanterelles may be confused with the jack-o'-lantern mushroom. A characteristic that distinguishes chanterelles from the jack-o'-lantern is the appearance of the gills. Jack-o'-lanterns have sharp, bendable, paper-like gills; chanterelles, however, have false gills that take the appearance of blunt ridges. [14] Furthermore, if the jack-o'-lantern's stem is peeled, the same shade of orange as the outer flesh, while the chanterelle is paler inside the stem.
Two common bioluminescent species that can be found in North America are the Omphalotus illudens and the Omphalotus olivascens.Omphalotus olivascens is common to southern to central California, while Omphalotus illudens is found in eastern North America. Both of these species are poisonous. The similarly poisonous mushroom Tsukiyotake ( Omphalotus japonicus , formerly known as Lampteromyces japonicus), can be found in Japan and eastern Asia and is also bioluminescent and contains the same poison, illudin. [3]
Chanterelle is the common name of several species of fungi in the genera Cantharellus, Craterellus, Gomphus, and Polyozellus. They are orange, yellow or white, meaty and funnel-shaped. On the lower surface, most species have rounded, forked folds that run almost all the way down the stipe, which tapers down from the cap. Many species emit a fruity aroma and often have a mildly peppery taste.
Cantharellus is a genus of mushrooms, commonly known as chanterelles, a name which can also refer to the type species, Cantharellus cibarius. They are mycorrhizal fungi, meaning they form symbiotic associations with plants. Chanterelles may resemble a number of other species, some of which are poisonous.
A jack-o'-lantern is a decoratively carved and internally lit pumpkin or turnip. associated with Halloween
Luciferin is a generic term for the light-emitting compound found in organisms that generate bioluminescence. Luciferins typically undergo an enzyme-catalyzed reaction with molecular oxygen. The resulting transformation, which usually involves breaking off a molecular fragment, produces an excited state intermediate that emits light upon decaying to its ground state. The term may refer to molecules that are substrates for both luciferases and photoproteins.
Cantharellus cibarius is the golden chanterelle, the type species of the chanterelle genus Cantharellus. It is also known as girolle.
Omphalotus illudens, commonly known as the eastern jack-o'lantern mushroom, is a large, orange mushroom that is often found in clumps on decaying stumps, buried roots, or at the base of hardwood trees in eastern North America. Its gills often exhibit a weak green bioluminescence when fresh. This green glow has been mentioned in several journal articles, which state that the phenomenon can persist up to 40–50 hours after the mushroom has been picked. It is believed that this display serves to attract insects to the mushroom's gills during nighttime, which can then distribute its spores across a wider area.
Foxfire, also called fairy fire and chimpanzee fire, is the bioluminescence created by some species of fungi present in decaying wood. The bluish-green glow is attributed to a luciferase, an oxidative enzyme, which emits light as it reacts with a luciferin. The phenomenon has been known since ancient times, with its source determined in 1823.
The illudins are a family of sesquiterpenes with antitumor antibiotic properties produced by some mushrooms. In their isolated form, illudins show selective toxicity for myelocytic leukemia and other carcinoma cells.
Clitocybe is a genus of mushrooms 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. They are primarily saprotrophic, decomposing forest ground litter. There are estimated to be around 300 species in the widespread genus.
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.
Acylfulvene is a class of cytotoxic semi-synthetic derivatives of illudin, a natural product that can be extracted from the jack o'lantern mushroom (Omphalotus olearius). One important acylfulvene, 6-hydroxymethylacylfulvene (irofulven), has been evaluated for the treatment of a wide assortment of cancers and tumors. It is thought that acylfulvene compounds kill cancer cells by DNA alkylation.
Omphalotus nidiformis, or ghost fungus, is a gilled basidiomycete mushroom most notable for its bioluminescent properties. It is known to be found primarily in southern Australia and Tasmania, but was reported from India in 2012 and 2018. The fan or funnel shaped fruit bodies are up to 30 cm (12 in) across, with cream-coloured caps overlain with shades of orange, brown, purple, or bluish-black. The white or cream gills run down the length of the stipe, which is up to 8 cm (3 in) long and tapers in thickness to the base. The fungus is both saprotrophic and parasitic, and its fruit bodies are generally found growing in overlapping clusters on a wide variety of dead or dying trees.
Cantharellus lateritius, commonly known as the smooth chanterelle, is a species of edible fungus in the mushroom family Cantharellaceae. 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.
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 C. cibarius 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 from the cap. The false gills often have a pinkish hue. It has a mild, sweet odor.
Cantharellus californicus, also called the California golden chanterelle, 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.
Jack o' lantern mushroom is a common name for several fungus species in the genus Omphalotus:
Omphalotus olivascens, commonly known as the western jack-o'-lantern mushroom, is an orange to brown-colored gilled poisonous mushroom endemic to the California Floristic Province. It is sometimes mistaken for chanterelles.
Omphalotus subilludens, commonly known as the Southern Jack O'lantern mushroom, is a basidiomycete fungi in the genus Omphalotus. It has been definitively recorded in Florida and Texas with reports of species in Arizona and Mexico. It fruits on dead and dying trees during warmer parts of the year, producing a fairly large orange to brown-orange fruiting body that occurs in clusters. It is most closely related to O. olivascans, O. olearius, and O. japonicus and has high cross compatibility with O. olivescans and O. olearis. It is poisonous to humans and animals when eaten but rarely produces life-threatening symptoms, usually poisonings are resolved in 24-48 hours, with the majority of symptoms being gastrointestinal. Compounds in these mushrooms have pharmacological potential with potential applications in anti-coagulants, cancer therapies, and antibiotics. It is also bioluminescent producing a faint glow around the gills through the oxidation of luciferase.
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.