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Ulmus 'Arno'
''Ulmus'' 'Arno' is an Italian hybrid cultivar derived from a crossing of '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, patented, and released to commerce in 2007.
==Description==
'Arno' is of erect habit with upward main branches forming an oval to round crown. In Italy the tree is remarkably fast-growing, though not as quick as its contemporary 'Fiorente'. The trunk is straight, and usually forks at a height of 3 m; the bark is grey-green, with grey-orange fissures. The alternate deciduous leaves are of moderate size, < 9 cm long by < 5 cm wide, ovate to lanceolate, featuring yellowish - green undulate margins; they remain green throughout autumn and are usually shed relatively late. The perfect, apetalous wind-pollinated flowers appear in late February; the tree begins flowering at the age of five years in Italy. The sessile samarae are ovate, 14 × 17 mm.〔
Image: Arno leaf.JPG|Leaf and 1 Euro coin.
Image: Arno leaf fungal disease 1.jpg|''Rhytisma ulmi''
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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