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Cyttaria gunnii : ウィキペディア英語版 | Cyttaria gunnii
''Cyttaria gunnii'', commonly known as the myrtle orange or beech orange, is an orange-white coloured and edible ascomycete fungus native to Australasia. It is a specific parasite of myrtle beech (''Nothofagus cunninghamii'') trees. ==History== English botanist Miles Joseph Berkeley described the beech orange in 1848. In 1886, a New Zealand fungus similar to the beech orange was described as ''Cyttaria purdiei''; later, however, the two species were assumed to be the same. A molecular study has now found the Australian and New Zealand fungi known as ''C. gunnii'' to be two distinct species. New Zealand populations are restricted to ''Nothofagus menziesii'' while the Australian ones are only found on ''Nothofagus cunninghamii'' and are hence found in southern Victoria and Tasmania. The evolution of the genus parallels that of the host genus ''Nothofagus''; hence ''C. septentrionalis'', the closest relative, parasitises Antarctic beech (''Nothofagus moorei''), the closest relative of myrtle beech. Ancestors of the two species are thought to have diverged from the South American and New Zealand ''Cyttaria'' species between 28 and 44 million years ago.
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