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''Suillus brevipes'' is a species of fungus in the family Suillaceae. First described by American mycologists in the late 19th century, it is commonly known as the stubby-stalk or the short-stemmed slippery Jack. The fruit bodies (mushrooms) produced by the fungus are characterized by a chocolate to reddish-brown cap covered with a sticky layer of slime, and a short whitish stipe that does not have either a partial veil or prominent dark or colored glandular dots. The cap can reach a diameter of about , while the stipe is up to long and thick. Like other bolete mushrooms, ''S. brevipes'' produces spores in a vertically arranged layer of spongy tubes with openings that form a layer of small yellowish pores on the underside of the cap. ''Suillus brevipes'' grows in a mycorrhizal association with various species of two- and three-needled pines, especially lodgepole and ponderosa pine. The fungus is found throughout North America, and has been introduced to several other countries via transplanted pines. In the succession of mycorrhizal fungi associated with the regrowth of jack pine after clearcutting or wildfires, ''S. brevipes'' is a multi-stage fungus, found during all stages of tree development. The mushrooms are edible, and are high in the essential fatty acid linoleic acid. ==Taxonomy== The species was first described scientifically as ''Boletus viscosus'' by American mycologist Charles Frost in 1874. In 1885, Charles Horton Peck, who had found specimens in pine woods of Albany County, New York, explained that the species name was a taxonomic homonym (''Boletus viscosus'' was already in use for another species named by Ventenat in 1863〔), and so renamed it to ''Boletus brevipes''.〔〔 Its current name was assigned by German Otto Kuntze in 1898.〔 William Alphonso Murrill renamed it as ''Rostkovites brevipes'' in 1948;〔 the genus ''Rostkovites'' is now considered to be synonymous with ''Suillus''.〔 Agaricales specialist Rolf Singer included ''Suillus brevipes'' in the subsection ''Suillus'' of genus ''Suillus'', an infrageneric (a taxonomic level below genus) grouping of species characterized by a cinnamon-brown spore print, and pores less than 1 mm wide.〔 Molecular phylogenetic analyses of ribosomal DNA sequences shows that the most closely related species to ''Suillus brevipes'' include ''S. luteus'', ''S. pseudobrevipes'', and ''S. weaverae'' (formerly ''Fuscoboletinus weaverae'').〔 The specific epithet is derived from the Latin ''brevipes'', meaning "short-footed".〔 The mushroom is commonly known as the "stubby-stalk"〔 or the "short-stemmed slippery Jack".〔 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「Suillus brevipes」の詳細全文を読む スポンサード リンク
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