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Pycnoporellus alboluteus
''Pycnoporellus alboluteus'', commonly known as the orange sponge polypore, is a species of polypore fungus in the family Fomitopsidaceae. Distributed throughout the boreal conifer zone, the fungus is found in mountainous regions of western North America, and in Europe. It causes a brown cubical rot of conifer wood, especially spruce, but also fir and poplar. The soft, spongy orange fruit bodies grow spread out on the surface of fallen logs. Mature specimens have tooth-like or jagged pore edges. A snowbank mushroom, ''P. alboluteus'' can often be found growing on logs or stumps protruding through melting snow. Although the edibility of the fungus and its usage for human culinary purposes are unknown, several species of beetles use the fungus as a food source.
==Taxonomy==
The species was originally described as ''Fomes alboluteus'' by Job Bicknell Ellis and Benjamin Matlack Everhart in 1895. Collected by botanist Charles Spencer Crandall,〔 the type specimens were found growing on the charred trunks of ''Abies subalpina'' in the mountains of Colorado, at an elevation of .〔 In its taxonomic history, it has been transferred to several genera. The original authors moved it to ''Polyporus'' in 1898, considering it allied to ''Polyporus leucospongia''. They also noted that the pores developed teeth-like elongations like those of genus ''Irpex''.〔 Other generic transfers include ''Scindalma'' by Otto Kuntze in the same year,〔 ''Aurantiporellus'' by William Alphonso Murrill in 1895, ''Aurantiporus'' by Murrill in 1905,〔 ''Phaeolus'' by Albert Pilát in 1937, and ''Hapalopilus'' by Appollinaris Semenovich Bondartsev and Rolf Singer in 1943.〔 It was given its current name in 1963 when Czech mycologists František Kotlaba and Zdeněk Pouzar placed it in ''Pycnoporellus''.〔
The generic name ''Pycnoporellus'' is Ancient Greek for "with countless pores".〔 The specific epithet ''alboluteus'' is a combination of the Latin words for "white" and "yellow". Curtis Gates Lloyd did not approve of the name, opining: "I hardly see how Ellis could have given it a worse name if he had tried, for it is neither "white" nor "yellow", but orange as Ellis described it. The young growth may possibly be white, but not when developed."〔 The fungus is commonly known as the "orange sponge polypore".〔〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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