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Amanita nothofagi : ウィキペディア英語版 | Amanita nothofagi
''Amanita nothofagi'' is a species of fungus in the Amanitaceae family. Endemic to New Zealand, the species was first described by mycologist Greta Stevenson in 1962. The fruit bodies have dark brown caps that are up to in diameter and covered with patches of soft greyish-brown scales or warts. The gills underneath the cap are crowded together, free from attachment to the stem, and white, becoming tinged with yellow in age. The stem of the mushroom is long by thick, and has a ring. The spore print is white, and individual spores are spherical to ellipsoid, measuring 7.5–9 by 7.5–9 micrometres. The mushroom may be confused with another New Zealand species, ''A. australis'', but can be distinguished by certain characteristics. ''Amanita nothofagi'' is a mycorrhizal species, and grows in association with native New Zealand trees such as Southern Beech. ==Taxonomy and classification== The species was first described as new to science by New Zealand mycologist Greta Stevenson who collected specimens in the mid-1950s, in Nelson and Cape Farewell. She published a description of the mushroom in the Royal Botanic Garden's journal ''Kew Bulletin'' in 1962, the second part of a five-part series of articles describing the mushroom flora of the country. The specific epithet ''nothofagi'' refers to ''Nothofagus'', the genus of Southern beeches with which the species is often associated.〔 ''Amanita'' authority Rodham Tulloss uses the common name "southern beech Amanita",〔 while Geoff Ridley suggests "charcoal flycap".〔 Stevenson classified ''Amanita nothofagi'' in the section ''Phalloideae'' of the genus ''Amanita'',〔 but Ridley considered it better placed in section ''Validae'' because of its "subglobose basidiospores, a clavate or occasionally abruptly bulbous stipe base, with sparse bands or a rim of volva material."〔
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