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''Hygrophorus olivaceoalbus'', commonly known as the olive wax cap, is a species of fungus in the genus ''Hygrophorus''. The fruit bodies (mushrooms) appear from midsummer to late autumn under conifers in North American and Eurasian mountain forests. The mushrooms have olive-brown, slimy caps with dark streaks and a dark umbo; the caps measure in diameter. Other characteristic features include a slimy stem up to long that is spotted with ragged scales up to a ring-like zone. As its name implies, the mushroom has a waxy cap and gills. It is native to North America and across the northern regions of Europe. According to a publication by the Council of Europe, the fungus is nearly extinct in France. Although ''Hygrophorus olivaceoalbus'' is edible, opinions are divided regarding its taste. Besides its usage as an edible mushroom, the fungus possesses antibiotic-like compounds. == Taxonomy and classification == The species was first officially described as ''Agaricus olivaceoalbus'' by Elias Fries in 1815.〔 It had earlier been published as ''Agaricus adustus'' by August Johann Georg Karl Batsch in 1783,〔 but this was an illegitimate renaming of ''Agaricus brunneus'' published in 1774 by Jacob Christian Schäffer.〔〔 It received its current scientific name when Fries transferred it to the genus ''Hygrophorus'' in 1838.〔 Paul Kummer moved the species to ''Limacium'' in 1871,〔 but this genus has since been sunk into synonymy with ''Hygrophorus''.〔 Several varieties of ''H. olivaceoalbus'' have been proposed:〔〔 Together with ''H. pustulatus'', ''H. persoonii'', ''H. mesotephrus'' and ''H. latitabundus'', ''H. olivaceoalbus'' form the section ''Olivaceoumbrini'' within the genus ''Hygrophorus''.〔 The fungi of this section have greasy to slimy caps and stems. Their caps are darkish brown grey, olive or orange, and their stems are ed or somewhat distinctly ringed.〔 Common names that have been used for the mushroom include the "slimy-sheathed waxy cap", the "olive hygrophorus",〔 the "sheated waxgill"〔 and the "olive wax cap".〔 The specific epithet ''olivaceoalbus'' is derived from the Latin words for olive-brown (''olivaceus'') and white (''albus'').〔 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「Hygrophorus olivaceoalbus」の詳細全文を読む スポンサード リンク
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