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Gyrodon lividus : ウィキペディア英語版 | Gyrodon lividus
''Gyrodon lividus'', commonly known as the alder bolete, is a pored mushroom bearing close affinity to the genus ''Paxillus''. Although found predominantly in Europe, where it grows in a mycorrhizal association with alder, it has also recorded from China, Japan and California. Fruit bodies are distinguished from other boletes by decurrent bright yellow pores that turn blue-grey on bruising. ''G. lividus'' mushrooms are edible. ==Taxonomy== The alder bolete was initially described by French mycologist Pierre Bulliard in 1791 as ''Boletus lividus'',〔 before being given its current binomial name in 1888 by Pier Andrea Saccardo when he transferred it to ''Gyrodon''.〔 When Saccardo circumscribed ''Gyroporus'', he included ''Boletus sistotremoides'' (published by Elias Fries in 1815) as the type species. Rolf Singer later determined that Fries's taxon was the same species as ''Gyroporus lividus''.〔 Before this, in 1886 Lucien Quélet erected the genus ''Uliporus'' with ''Boletus lividus'' as the type.〔 As a result of Singer's discovery, the genus ''Uliporus'' was rendered obsolete, and ''Boletus sistrotremoides'' became synonymous with ''Gyropus lividus''.〔 The generic term ''Gyrodon'' is derived from the Ancient Greek ''gyros'' "whorl" and ''odon'' "tooth",〔〔 while the specific epithet ''lividus'' is Latin for "lead-coloured".〔 The fungus is commonly known as the alder bolete.〔 Molecular research confirms the relations of the genus ''Gyrodon'' and the gilled genus ''Paxillus'' as sister taxa, and one of the earliest diverging lineages of the suborder Boletineae.〔 Two subspecies of ''G. lividus'' have been described: subsp. ''alneti'', published by Sven Johan Lindgren in 1874, and subsp. ''labyrinthicus'', published by Saccardo in 1888. Neither are considered to have independent taxonomic significance.〔
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