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The Wych Elm cultivar ''Ulmus glabra'' 'Horizontalis', commonly known as the Weeping Wych Elm or Horizontal Elm, was discovered in a Perth nursery circa 1816. The tree was originally identified as 'Pendula' by Loddiges (London), in his catalogue of 1836, a name adopted by Loudon two years later in ''Arb. Frut. Brit'' 3: 1398, but later sunk as a synonym for 'Horizontalis'.〔Green, P. S. (1964). Registration of cultivar names in Ulmus. ''Arnoldia'' Vol. 24, Arnold Arboretum, Harvard University. ()〕 ==Description== 'Horizontalis' has branches that extend out horizontally with weeping branchlets. It is usually grafted onto a tall understock of ''Ulmus glabra'' to effectively display its weeping habit. The tree can eventually grow to a height of 20 metres with a similar spread.〔Elwes, H. J. & Henry, A. (1913). ''The Trees of Great Britain & Ireland''. Vol. VII. pp 1848-1929. Private publication ()〕 It can be distinguished from the related Camperdown Elm by its more spreading and flattened canopy and much larger mature size, although its shape does vary widely, as noted by Loudon: "A beautiful...tree generally growing to one side, spreading its branches out in a fan-like manner...sometimes horizontally and at other times almost perpendicularly downwards so that the head of the tree exhibits great variety of shape".〔Nicholson, George, (Ed.), (1888). ''The Illustrated Dictionary of Gardening - A practical scientific encyclopedia of horticulture for gardeners and botanists.'' Upcott-Gill, London.〕 Image:FernhillWeepingElm.jpg|Weeping Elm (''Ulmus glabra'' 'Horizontalis') in Fernhill Cemetery, New Brunswick. Image:Camperdown Elm 003.jpg|For comparison, Weeping Elm (''Ulmus glabra'' 'Camperdownii'), Prince Edward Island, Canada. Image:Top of pendula.jpg|Top of ''Ulmus glabra'' 'Horizontalis' in Royal Pavilion Gardens, Brighton, UK. Photo 1988 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ulmus glabra 'Horizontalis'」の詳細全文を読む スポンサード リンク
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