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Ulmus harbinensis : ウィキペディア英語版 | Ulmus harbinensis
''Ulmus harbinensis'' Nie & Huang, also known as the Harbin Elm, is a small elm found only in the province of Heilongjang in the northeastern extremity of China, where it occurs in mixed forest. ==Description== A robust, sturdy tree which can reach a height of < 15 m, with a slender trunk of 0.3 m d.b.h. The bark is irregularly but finely fissured. The wing-less glabrous branchlets bear small, obovate, coarsely pubescent leaves < 5.5 cm long by 3.5 cm broad. The wind-pollinated apetalous flowers appear in April; the generally orbicular samarae in June.〔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. ()〕
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