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Ulmus 'San Zanobi'
''Ulmus'' 'San Zanobi' is a hybrid elm cultivar raised by the Istituto per la Protezione delle Piante (IPP) in Florence, from a crossing of the Dutch hybrid 'Plantyn' (female parent) and the Siberian Elm ''Ulmus pumila'' clone 'S 15'; it was released to commerce in 2002.
==Description==
'San Zanobi' is a fastigiate, monopodial tree, with glabrous, bright green leaves < 15 cm long × < 6 cm broad.〔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. (2004). 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 'Plinio', the tree lacks striking autumn colours, the leaves remaining green almost until they fall in late November. 〔Brookes, A. H. (2015). ''Disease-resistant elms, Butterfly Conservation trials report, 2015'' Butterfly Conservation, Hants & IoW Branch, England. ()〕
In Italy, 'San Zanobi' begins flowering in its fifth year (sixth in the UK), and can begin suckering from roots at about the same age. The perfect, apetalous wind-pollinated flowers appear in mid March in the UK. The sessile samarae are ovate, 15 mm × 18 mm.〔
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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