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Ulmus 'Rebona'
''Ulmus'' 'Rebona' is an American hybrid cultivar raised by the Wisconsin Alumni Research Foundation (WARF) as selection '916', derived from a crossing of Siberian Elm ''U. pumila'' (female parent) with Japanese Elm ''U. davidiana'' var. ''japonica'' .〔Santamour, F. S., & Bentz, S. E. Updated checklist of elm (Ulmus) cultivars for use in North America. ''Journal of Arboriculture'', 21(3): May, 1995. ()〕 The tree was registered in 1993 by Conrad Appel KG, of Darmstadt (ceased trading 2006) and is a sibling of 'New Horizon' (selection '917'). In Europe, 'Rebona' is a 'Resista' elm () and therefore protected under E U breeders rights (E U council decision 2100/94).
==Description==
'Rebona' bears a close resemblance to its sibling 'New Horizon', but requires less maintenance owing to a better leader. The tree grows rapidly, developing a fastigiate pyramidal shape with ascending branches. The glossy clear-green leaves are comparatively small, though slightly larger than those of 'New Horizon'.〔Heybroek, H. M., Goudzwaard, L, Kaljee, H. (2009). ''Iep of olm, karakterboom van de Lage Landen'' (:Elm, a tree with character of the Low Countries). KNNV, Uitgeverij. ISBN 978 90 5011 281 9〕
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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