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''Ulmus'' 'Plinio' is a hybrid elm cultivar derived from a crossing of the Dutch cultivar 'Plantyn' (female parent) with the Siberian Elm ''Ulmus pumila'' clone 'S.2'. It was raised by the Istituto per la Protezione delle Piante (IPP), in Florence and released for sale in 2003. ==Description== In Italy, 'Plinio' is a rounded tree with a broad crown, the width typically equalling 70% of height, and a short, often bent, trunk. The dark-green leaves are < 6.5 cm long by 3 cm broad and glabrous on both sides, on < 6 mm petioles.〔Santini A., Fagnani A., Ferrini F. & Mittempergher L., (2002) 'San Zanobi' and 'Plinio' elm trees. () ''HortScience'' 37(7): 1139-1141. 2002. American Society for Horticultural Science, Alexandria, VA 22314, USA〕〔Santini A., Fagnani A., Ferrini F., Mittempergher L., Brunetti M., Crivellaro A., Macchioni N., Elm breeding for DED resistance, the Italian clones and their wood properties. () ''Invest Agrar: Sist. Recur. For.'' (2004) 13 (1), 179-184. 2004.〕 Like its compatriot 'San Zanobi', the tree is not possessed of striking autumn colours, the leaves remaining green almost until they fall in late November. The perfect, apetalous wind-pollinated flowers appear in mid March in the UK. The sessile samarae are round, and range from 17 mm to 22 mm in diameter. Seed has exhibited a modest viability of between 10% and 20%.〔Brookes, A. H. (2015). ''Disease-resistant elms, Butterfly Conservation trials report, 2015'' Butterfly Conservation, Hants & IoW Branch, England. ()〕 Image:AB Plinio leaves.jpg|Leaves Image:Plinio samarae.jpg|Samarae Image:Plinio SHHG 1.jpg|'Plinio' on fertile soil 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 'Plinio'」の詳細全文を読む スポンサード リンク
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