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An agaric (/ˈæɡərɪk, əˈɡærɪk/) is a type of fungal fruiting body characterized by the presence of a pileus (cap) that is clearly differentiated from the stipe (stalk), with lamellae (gills) on the underside of the pileus. It is a type of mushroom or (particularly if poisonous) toadstool, the diverse group of agarics being lumped together as gilled mushrooms.^[1]^[2] "Agaric" can also refer to a basidiomycete species characterized by an agaric-type fruiting body.

Etymology

Originally, agaric meant 'tree-fungus' (after Latin agaricum); however, that changed with the Linnaean interpretation in 1753 when Linnaeus used the generic name Agaricus for gilled mushrooms.

Taxonomy

Most species of agarics belong to the order Agaricales in the subphylum Agaricomycotina. The exceptions, where agarics have evolved independently, feature largely in the orders Russulales, Boletales, Hymenochaetales, and several other groups of basidiomycetes. Old systems of classification placed all agarics in the Agaricales and some (mostly older) sources use "agarics" as the colloquial collective noun for the Agaricales. Contemporary sources now tend to use the term euagarics to refer to all agaric members of the Agaricales. "Agaric" is also sometimes used as a common name for members of the genus Agaricus, as well as for members of other genera; for example, Amanita muscaria is known by its common name "fly agaric". The genus Agaricus was first described by Carl Linnaeus in 1753,^[3] and back then it contained all agarics. In the 19th century, Elias Magnus Fries split the genus into several smaller genera.^[4] More recently, DNA studies revealed that agarics are not necessarily closely related to each other, and that mushroom gills are an example of convergent evolution.^[2]

References

^ "Gilled Mushroom". Mushroom-Growing.com. Retrieved 7 August 2024.
^ ^a ^b Kuo, Michael. "The Gilled Mushrooms". MushroomExpert.com. Retrieved 7 August 2024.
^ "Agaricus Linnaeus, 1753". www.gbif.org. Retrieved 2024-10-09.
^ Arora, David (1986). Mushrooms demystified: a comprehensive guide to the fleshy fungi (2nd ed.). Berkeley: Ten Speed Press. ISBN 978-0-89815-170-1.

External links

"Gilled Mushrooms" at AmericanMushrooms.com
"Evolution & Morphology in the Homobasidiomycetes" by Gary Lincoff & Michael Wood, MykoWeb.com

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