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Ulmus 'Exoniensis'
''Ulmus'' 'Exoniensis', the 'Exeter Elm', was discovered near Exeter, England, in 1826, and propagated by the Ford nursery in that city.〔Bean, W. J. (1981). ''Trees and shrubs hardy in Great Britain'', 7th edition. Murray, London〕〔Elwes, H. J. & Henry, A. (1913). ''The Trees of Great Britain & Ireland''. Vol. VII. pp 1848-1929. Private publication, Edinburgh. ()〕〔Richens, R. H. (1983). ''Elm''. Cambridge University Press.〕〔White, J. & More, D. (2003). ''Trees of Britain and Northern Europe''. Cassell's, London.〕 Traditionally believed to be a cultivar of the Wych Elm ''U. glabra'', its fastigiate shape when young, upward-curving tracery, small samarae and leaves, late leaf-flush and late leaf-fall, taken with its south-west England provenance, suggest a link with the Cornish Elm, which shares these characteristics.
==Description==
The tree initially has an upright, columnar form,〔(Photograph of fastigiate form of young Exeter elm )〕 but later develops a large rounded crown and occasionally reaches 17 m in height. It is chiefly distinguished by its contorted leaves, < 11 cm long by 8 cm broad, which occasionally wrap around the branchlets and remain attached to the tree well into winter.〔(Photograph of 'Exoniensis' leaves in early summer )〕
Image:AB Ulmus glabra 'Exon' leaves 2.jpg
Image:RN Ulmus glabra Exoniensis winter.JPG
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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