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Fu, who","datePublished":"2016-03-21","dateModified":"2016-03-21","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki2\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki2\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/5\/52\/U._microcarpa_foliage_detail.jpg\/120px-U._microcarpa_foliage_detail.jpg","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/5\/52\/U._microcarpa_foliage_detail.jpg\/120px-U._microcarpa_foliage_detail.jpg","height":"90","width":"120"},"url":"https:\/\/wiki.edu.vn\/en\/wiki2\/ulmus-microcarpa-wikipedia\/","wordCount":1909,"articleBody":" (adsbygoogle = window.adsbygoogle || []).push({});before-content-x4Species of tree (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Ulmus microcarpa was named and first described by the Chinese botanist L. K. Fu, who discovered the tree in the Chayu broad-leaved forests of south-eastern Xizang at altitudes of around 2800\u00a0m during the 1973 Qinghai – Tibet Expedition.[1] Unlike the majority of Tibet, the Chayu region has a subtropical highland climate featuring warm, wet, summers and mild, dry, winters (avg. annual rainfall 807\u00a0mm). Commonly known as the Tibetan Elm, the tree was introduced to the United States in 2006, and the UK in 2013; it remains one of the rarest species of elm in cultivation.Table of Contents (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Description[edit]Pests and diseases[edit]Cultivation[edit]Accessions[edit]References[edit]Description[edit]U. microcarpa can reach a height of 30\u00a0m in the wild, the trunk < 80\u00a0cm d.b.h. The large oblong to elliptic leaves are 8.5\u201317\u00a0cm long by 5\u20138\u00a0cm broad with 5\u00a0mm petioles, likened by Fu to those of U. wallichiana and U. bergmanniana var. lasiophylla, but much smaller on juvenile plants. As its specific epithet implies, the suborbicular, glabrous samarae are small, 7\u20138\u00a0mm long by 7\u20138\u00a0mm wide, the seed at the centre. Ploidy: 2n = 28.[2]Growth in the UK has been slow, the branches on juvenile trees increasing in length by no more than 10\u201312\u00a0cm per annum on moist, fertile soil. The species is the first to leaf in spring in the UK, and the first to defoliate in autumn, usually by late September.[3]Foliage detail, Great Fontley, UKLast and previous year’s branchlet growthPests and diseases[edit]No information available; U. microcarpa was not known in the United States when the majority of Asiatic elms were screened for resistance to Dutch elm disease by the late George Ware at the Morton Arboretum, Illinois, in the early 1990s.[4]Cultivation[edit]U. microcarpa is very rare in cultivation outside China, and accessions are (2019) restricted to two arboreta in the United States and four in the UK. The tree was one of 12 Chinese species under evaluation at the Morton Arboretum, Illinois, in 2009 by the late Dr George Ware.[5] (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Accessions[edit]North AmericaBrenton Arboretum, US. Acc. no. 06\u2013035; from the Morton Arboretum (see below).Morton Arboretum, US. Acc. nos. 362\u20132006, 588\u20132006, from seed wild collected in Tibet by the Chinese Academy of Forestry, Research Institute of Forestry Tibet Autonomous Region, China.EuropeGrange Farm Arboretum, Lincolnshire, UK. Rooted cuttings from Brenton Arboretum, acquired 2013. Acc. no. 1076.Royal Botanic Garden Edinburgh, UK. One small rooted cutting acquired 2014. Acc. no. 20141572.[6]Sir Harold Hillier Gardens, Ampfield, Hampshire, UK. Rooted cutting in propagation unit (2018), acc. no. 2017.0196Wijdemeren City Council, Netherlands. 2 trees planted 2019 cemetery Hornhof, Nederhorst den Berg.References[edit]^ Fu, L. K. (1979). Chinese plant database and catalogue – Ulmus microcarpa. Acta Phytotaxonomica Sinica 17(1): 48\u201349, pl. 2, f. 5\u20138, 48 1979, Beijing, China^ Fu, L. K., Xin, Y. & Whittemore, A. (2002). Ulmaceae, in Wu, Z. & Raven, P. (eds) Flora of China, Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA [1]^ Brookes, A. (2017). Great Fontley Elm Trial Report 2017. Butterfly Conservation, Lulworth, UK.^ Ware, G. (1995). Little known elms from China: landscape tree possibilities. Journal of Arboriculture. 21(6), 284\u2013288. November 1995.^ Dirr, M. (2009). ‘Future Tree Selections’. Western, Spring 2009, \u00a0p.8. Western Nursery & Landscape Association, St Joseph, Missouri.[2]^ Royal Botanic Garden Edinburgh. (2017). 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