''Hemipholiota'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of agaric fungi in the order

Agaricales The fungal order Agaricales, also known as gilled mushrooms (for their distinctive gills) or euagarics, contains some of the most familiar types of mushrooms. The order has 33 extant families, 413 genera, and over 13,000 described species, alo ...

. It was originally proposed by

Rolf Singer Rolf Singer (June 23, 1906 – January 18, 1994) was a Germany, German-born mycologist and one of the most important Taxonomy (biology), taxonomists of gilled mushrooms (agarics) in the 20th century. After receiving his Ph.D. at the University ...

in 1962 as a

subgenus In biology, a subgenus (plural: subgenera) is a taxonomic rank directly below genus. In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between t ...

of '' Pholiota'' to contain species with absent or sparse pleurocystidia and absent chrysocystidia. Henri Romagnesi raised it to generic status in 1980, but this naming was

invalid Invalid may refer to: * Patient, a sick person * one who is confined to home or bed because of illness, disability or injury (sometimes considered a politically incorrect term) * .invalid, a top-level Internet domain not intended for real use As t ...

as it did not meet the requirements of the

International Code of Nomenclature for algae, fungi, and plants The ''International Code of Nomenclature for algae, fungi, and plants'' (ICN) is the set of rules and recommendations dealing with the formal botanical names that are given to plants, fungi and a few other groups of organisms, all those "trad ...

Marcel Bon Marcel Bon (17 March 1925 – 11 May 2014)http://fmbds.org/wp-content/uploads/2014/06/CAFAM-2014-CR-complet.pdf was one of France's best known field mycologists. He was born in Picardy in 1925 and came to mycology through general botany, and ph ...

published the genus validly in 1986. Molecular analyses revealed that ''Hemipholiota'' was distinct from '' Pholiota'' and also from a new genus ''

Hemistropharia ''Hemistropharia'' is a genus of agarics of unclear classification, though possibly related to the Hymenogastraceae or Tubarieae. A monotypic genus, it contains the single species ''Hemistropharia albocrenulata''. This species, originally named ...

'' that had been classified with ''Hemipholiota''. Both genera fall outside of the Strophariaceae. The generic name required conservation against an older obscure name. The Hemipholiota spore print is brown in its appearance.

References

Agaricales genera Strophariaceae Taxa named by Rolf Singer {{Agaricales-stub