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''Laetiporus sulphureus'' is a species of bracket fungus (fungus that grows on trees) found in Europe and North America. Its common names are crab-of-the-woods, sulphur polypore, sulphur shelf, and chicken-of-the-woods. Its fruit bodies grow as striking golden-yellow shelf-like structures on tree trunks and branches. Old fruibodies fade to pale beige or pale grey. The undersurface of the fruit body is made up of tubelike pores rather than gills. ''Laetiporus sulphureus'' is a saprophyte and occasionally a weak parasite, causing brown cubical rot in the heartwood of trees on which it grows. Unlike many bracket fungi, it is edible when young, although adverse reactions have been reported. ==Taxonomy and phylogenetics== ''Laetiporus sulphureus'' was first described as ''Boletus sulphureus'' by French mycologist Pierre Bulliard in 1789. It has had many synonyms and was finally given its current name in 1920 by American mycologist William Murrill. ''Laetiporus'' means with bright pores and ''sulphureus'' means the colour of sulphur. Investigations in North America have shown that there are several similar species within what has been considered ''L. sulphureus'', and that the true ''L. sulphureus'' may be restricted to regions east of the Rocky Mountains. Phylogenetic analyses of ITS, nuclear large subunit and mitochondrial small subunit rDNA sequences from North American collections have delineated five distinct clades within the core ''Laetiporus'' clade:〔Burdsall, Jr., Harold H.; Banik, Mark T. (2001). "The genus Laetiporus in North America". Harvard Papers in Botany 6 (1): 43–55.〕 *Conifericola clade: contains species that live on conifers, such as ''L. conifericola'' and ''L. huroniensis''. All of the other tested species grow on angiosperms. *Cincinnatus clade: contains ''L. cincinnatus'' *Sulphureus clade I: contains white-pored ''L. sulfureus'' isolates. *Sulphureus clade II: contains yellow-pored ''L. sulfureus'' isolates. *Gilbertsonii clade: contains ''L. gilbertsonii'' and unidentified Caribbean isolates 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Laetiporus sulphureus」の詳細全文を読む スポンサード リンク
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