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''Melanoleuca melaleuca'' is a species of mushroom in the Tricholomataceae family, and it is the type species of its genus ''Melanoleuca''. It is difficult to distinguish from other related species firstly because it is variable, secondly because the taxonomic criteria are often based on microscopic characteristics, and thirdly because there is much disagreement between authorities as to exactly how the species should be defined. ==Description== *Cap: 3.5 – 8 cm, low convex, often with a low umbo, smooth, dark brown fading to greyish brown. *Gills: Whitish, crowded, emarginately attached to stipe. *Stipe: Up to 10 cm long and typically 1 cm thick, similarly coloured to the cap but lighter, with longitudinal fibres. *Spores: 6.5 - 8.5 x 5 - 6 µm, elliptical with amyloid warts (staining blue in Melzer's reagent), spore print white. *Odor: Faint. *Microscopic features: May or may not have fusiform cheilocystidia (see below in taxonomy section). *Habitat: Grassy places in woods, roadsides, heathland etc. This description is taken from several references, which generally agree except on microscopic features.〔〔〔〔〔 Various authorities imply that around ''M. melaleuca'' there is a complex of closely related species without clear dividing lines, and the that current analysis (which varies from one to another) requires more clarification.〔〔〔 Much of the taxonomic work on ''Melanoleuca'' has been done in Europe and the status of North American specimens is less certain;〔 the situation is probably even more complicated when the corresponding worldwide mushrooms are taken into account. 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「Melanoleuca melaleuca」の詳細全文を読む スポンサード リンク
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