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Ulmus glaucescens
''Ulmus glaucescens'' Franch. the Gansu Elm, is a small deciduous tree from the northern provinces of China, where it is found along river valleys and on mountain slopes at elevations of 2000–2600 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. ()〕
==Description==
Although typically no more than 10 m in height, it can sometimes reach 18 m. Slow growing, the tree is possessed of a stiff branching pattern resembling that of a young American Elm. The bark is longitudinally fissured and occasionally exhibits a peeling, mottled pattern. However, the tree is most easily distinguished by its small leaves; ranging from ovate to lanceolate, their size rarely exceeds 5 cm in length by 2.5 cm breadth, and are borne on twigs devoid of corky wings or layers. The perfect wind-pollinated apetalous flowers are produced on second-year shoots in March - April; the samarae are elliptic, < 25 mm long, and can remain on the tree until the end of May.
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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