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Ramalina fraxinea : ウィキペディア英語版
Ramalina fraxinea

''Ramalina fraxinea'', the Cartilage Lichen,〔(Biolib. CZ )〕〔(Species information )〕is a fruticose lichen with erect or pendulous thalli and branches that are flattened. Colour varies from pale green though yellow-grey to white-grey; apothecia are frequent and soralia may also be present. It belongs to the group known as 'Sac Fungi'.〔()〕
== Habitats and distribution ==

This lichen is widespread in the United Kingdom, being found on tree bark. In north-eastern England and eastern Scotland it is often well developed, growing up to 12 cms with thongs of up to 2 cm wide. In less favourable areas it is much smaller.〔Alvin, Kenenth L. (1977), ''The Observer's Book of Lichens''. London : Frederick Warne. ISBN 0-7232-1566-9. pp. 46 - 48.〕 The species has declined markedly since the mid 20th century and is now rare or absent in many UK areas.〔(), the National Biodiversity Network's NBN Gateway -searchable by user-defined time periods - goto ''Browse Species''.〕 Its sensitivity to air pollution and fertilizer enrichment may be reasons for the decline.〔Dobson, F.S. (2011) ''Lichens: an illustrated guide to the British and Irish species'' (6th edn). Stroud: Richmond Publishing. ISBN 978-0-85546-315- 1, p.386.〕 It is mainly found on the bark of Acer, Fraxinus, Populus, Tilia and Ulmus; it has been found growing on Rhododendron〔(Royal Botanic Gardens Edinburgh. )〕 and oak.〔(Southampton Natural History Society )〕
It has been recorded in Spain,〔(Spanish lichen records )〕 Belgium, Luxembourg, France,〔(Lichenology )〕〔(Allan Silverside's lichens )〕 England, Scotland,〔 Hungary,〔(Hungarian lichens )〕 Norway〔(Norwegian Records )〕 and Latvia.〔(Latvia lichen records )〕 The species has been widely recorded in the United States of America.〔(Cartilage Lichen )〕
''R. fraxinea'' likes windy, exposed and well-lit sites and it is found on species with nutrient-rich bark.〔(Geograph photographs )〕 The species also likes humid or foggy areas near ponds or rivers.〔(Enclylopedia of Life )〕

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