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Erigeron
''Erigeron'' () is a large genus of plants in the daisy family. It is sometimes confused with other closely related genera, ''Aster'' and the true daisy ''Bellis''. The genus has a cosmopolitan distribution in dry, mountainous areas and grassland, with the highest diversity in North America.〔〔(Linnaeus, Carl von. 1753. Species Plantarum 2: 863-865 ) in Latin〕〔(Tropicos, ''Erigeron'' L. )〕〔(The Plant List, search for ''Erigeron'' )〕
==Etymology==
Its English name, fleabane, is shared with related plants in several other genera. It appears to be derived from a belief that the dried plants repelled fleas 〔Frances Perry wrote in Collins Guide to Border Plants (2nd edition, 1956) p.146 that it was reputed to repel insects but that the name referred to a tropical species which has a particularly strong odour〕 or that the plants were poisonous to fleas.〔see Oxford English Dictionary under 'Flea-bane' and under 'Bane' para 2.b. The earliest quotation cited in the O.E.D. is dated 1813 when Humphrey Davy in Elements of Agricultural Chemistry stated that the fleabane of Canada had only recently been found in Europe 〕 The generic name ''Erigeron'' is derived from the Greek (''eri'' = early; ''geron'' = old man), a reference to the appearance of the white hairs of the fruit soon after flowering or possibly alluding to the early appearance of the seed heads.〔Frances Perry: Collins Guide to Border Plants 2nd edition (1956) p.145〕 The Ancient Greek word is masculine, so that specific epithets should have masculine endings (e.g. ''glaucus''). However, authors have incorrectly used neuter endings (e.g. ''glaucum''), as Augustin Pyramus de Candolle did in his 1836 account of the genus.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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