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Pulveroboletus ravenelii
''Pulveroboletus ravenelii'', commonly known as Ravenel's bolete or the powdery sulfur bolete, is a species of bolete fungus in the family Boletaceae. Described as new to science in 1853, the widely distributed species is known from Asia, Australia, North America, Central America, and South America. Mycorrhizal with oak, the fungus fruits on the ground singly, scattered, or in groups in woods. Fruit bodies (mushrooms) have convex to flat, yellowish to brownish-red caps up to in diameter. On the cap underside, the pore surface is bright yellow before turning dingy yellow to grayish brown with age; it stains greenish blue then grayish brown after injury. A cottony and powdery partial veil remains as a ring on the stipe. The mushrooms are edible, and have been used in traditional Chinese medicine and for mushroom dyeing.
== Taxonomy ==
The species was first described as ''Boletus ravenelii'' by Miles Joseph Berkeley and Moses Ashley Curtis in 1853. Specimens were sent to them by American botanist Henry William Ravenel, who collected them in South Carolina. They considered the bolete "a most splendid species closely allied to ''B. hemichrysus'', and, like that, remarkable for the pulverulent veil."〔 The specific epithet honors Ravenel.〔 William Alphonso Murrill transferred the fungus to the genus ''Pulveroboletus'' in 1909, giving it the name by which it is known today.〔 The mushroom is commonly known as "Ravenel's bolete"〔 or the "powdery sulfur bolete".〔
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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