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Boletus subluridellus : ウィキペディア英語版 | Boletus subluridellus
''Boletus subluridellus'' is a species of bolete fungus in the family Boletaceae. Described as new to science in 1971 by American mycologists, the bolete is found in the eastern United States and Canada. It grows on the ground in coniferous and mixed forests in a mycorrhizal association with deciduous trees, especially oak. The fruit bodies (mushrooms) have orangish-red, broadly convex caps that are up to in diameter, with small, dark reddish pores on the underside. The pale yellow stipe measures long by thick. All parts of the fruit body will quickly stain blue when injured or touched. ==Taxonomy==
The species was described by American mycologists Alexander H. Smith and Harry D. Thiers in their 1971 monograph on the bolete fungi of Michigan.〔 The type collection was made by Smith on a golf course near Ypsilanti, Michigan in September of 1961; it is kept at the University of Michigan herbarium.〔 ''Boletus subluridellus'' is classified in the section ''Luridi'' of the genus ''Boletus''. Section ''Luridi'' is characterized by boletes that immediately turn blue with cutting or bruising, narrow pores that are usually red, and the occasional presence of toxins in the fruit bodies. According to the scheme proposed by Smith and Thiers, the form of the dermatocystidia (cystidia on the cap cuticle) is important to species delimitation in section ''Luridi''. In a 1993 study, however, Roland Treu found no major consistent microscopic differences between ''B. subluridellus'', ''B. rufocinnamomeus'', and ''B. roseobadius''.〔 The specific epithet ''subluridellus'' refers to its similarity to ''Boletus luridellus''. ''Luridellus'' means "drab yellow to dirty brown".〔
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