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''Mycena adscendens'', commonly known as the frosty bonnet, is a species of fungus in the family Mycenaceae. The fungus produces small white fruit bodies (mushrooms) with caps up to in diameter that appear to be dusted with sugar-like granules. Caps are supported by thin, hollow stems up to long, which are set on a disc-like base. It is distributed in the United States, where it has been found from Washington to California, Europe, and Turkey. The fruit bodies grow on fallen twigs and other woody debris on the forest floor, including fallen hazel nuts. The variety ''carpophila'' is known from Japan. There are several small white ''Mycena'' species that are similar in appearance to ''M. adscendens'', some of which can be reliably distinguished only by examining microscopic characteristics. ==Taxonomy== The species, originally named ''Agaricus adscendens'' by Wilhelm Gottfried Lasch in 1829, was first collected in the Province of Brandenburg, in what was then the Kingdom of Prussia (now Germany).〔 It was Dutch mycologist Maas Geesteranus who assigned the species its current name in a 1981 publication.〔 According to Maas Geesteranus,〔〔 Miles Berkeley's 1836 ''Agaricus tenerrimus''〔 is the same species as ''Mycena adscendens'', as well as all later synonyms based on this basionym: ''Mycena tenerrima'', published by Lucien Quélet in 1872;〔 ''Prunulus tenerrimus'' by William Alphonso Murrill in 1916;〔 and Karel Cejp's 1930 ''Pseudomycena tenerrima''.〔 Although Index Fungorum agrees with Maas Geesteranus's synonymy,〔 other authorities treat the species as independent.〔〔 An additional synonym is ''Agaricus'' (''Mycena'') ''farinellus'', described by Johann Feltgen from Luxembourg in 1906.〔 The variety ''M. adscendens'' var. ''carpophila'', published by Dennis Desjardin in 1995,〔 was originally proposed as ''M. tenerrima'' var. ''carpophila'' by Jakob Emanuel Lange in 1914.〔 ''Mycena adscendens'' is the type species of section ''Sacchariferae'' of the genus ''Mycena'', which contains white species with floccose caps (covered with tufts of soft woolly hairs). Other members of this section include ''M. floccifera'', ''M. discopus'', and ''M. nucicola''. The mushroom is commonly known as the "frosty bonnet".〔 The specific epithet ''adscendens'', derived from the Latin, means "ascending" or "curving up from a prostrate base".〔 ''Tenerrima'' derives from the Latin ''tener'', meaning "tender" or "delicate".〔 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「Mycena adscendens」の詳細全文を読む スポンサード リンク
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