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Ulmus changii
''Ulmus changii'' W. C. Cheng, occasionally known as the Hangzhou elm, is a small deciduous tree found across much of China in forests at elevations of up to 1800 m.〔Fu, L., 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. ISBN 1-930723-40-7 ()〕 Owing to its increasing scarcity, ''U. changii'' was added to the Hainan Province Protected Plants List in 2006, and classed as 'Vulnerable' by the International Union for the Conservation of Nature (IUCN).
==Description==
The tree can reach a height of 20 m with a trunk of about 0.9 m d.b.h; the bark is dark grey. The leaves are generally ovate, < 11 cm long, glabrescent and smooth when mature. The wind-pollinated apetalous flowers are produced on second-year shoots in March - April, the samarae are almost orbicular, < 35 mm in diameter. 〔
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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