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Ulmus minor 'Umbraculifera'
The Field Elm cultivar ''Ulmus minor'' 'Umbraculifera' was originally cultivated in Iran, where it was widely planted as an ornamental, and occasionally grew to a great size. Litvinov considered it a cultivar of a wild elm with a dense crown that he called ''U. densa'', from the mountains of Turkestan, Ferghana, and Aksu. 〔Elwes, H. J., & Henry, A., (1913). ''The Trees of Great Britain & Ireland''. Vol. VII, p.1893. Private publication, Edinburgh, 1913.()〕〔Photograph by Frank Nicholas Meyer of probable wild form of ''U. densa'', via.lib.harvard.edu ()〕 Non-rounded forms of ''Umbraculifera'' are also found in Isfahan Province, Iran.〔''Encyclopaedia Iranica'', 'Elm', (6): iranicaonline.org/articles/elm〕 Zielińksi in ''Flora Iranica'' considered it an ''U. minor'' cultivar.〔J. Zielińksi, 'Ulmaceae', ''Flora Iranica'', ed. K. H. Rechinger (Graz, 1979)〕
==Description==
The tree is distinguished by its dense, rounded, sometimes flat-topped habit.〔'Elms grown in America', ''Arnoldia'', arnoldia.arboretum.harvard.edu, 7 December 1951, p.87 ()〕〔''Ulmus minor'' 'Umbraculifera' photographs, Michigan State University ''Plant Encyclopedia'' () ()〕 In its rounded form it is always grafted onto ''U. minor'' standards. 〔
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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