Polyporus is a genus of polypore in the family Polyporaceae.
Elias Fries divided Polyporus into three subgenus in his 1855 work Novae Symbol Mycologici: Eupolyporus, Fomes, and Poria. In a 1995 monograph, Maria Núñez and Leif Ryvarden grouped 32 Polyporus species into 6 morphologically-based infrageneric groups: Admirabilis, Dendropolyporus, Favolus, Polyporellus, Melanopus, and Polyporus sensu stricto.
The identity of the type species of Polyporus has long been a matter of contention among mycologists. Some have preferred P. brumalis, some P. squamosus, while others have preferred P. tuberaster.
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