| 翻訳と辞書 |
| Ulmus macrocarpa ： ウィキペディア英語版 |
Ulmus macrocarpa
''Ulmus macrocarpa'' Hance, the large-fruited elm, is a deciduous tree or large shrub endemic to the Far East excluding Japan. It is notable for its tolerance of drought and extreme cold and is the predominant vegetation on the dunes of the Khorchin sandy lands in the Jilin province of north-eastern China, making a small tree at the base of the dunes, and a shrub at the top ().
==Description==
By the age of ten years, the tree bears a close resemblance to the American elm ''U. americana'', but will never approach the latter's size. The tree can reach a height of 17 m, with a slender trunk rarely exceeding 0.4 m d.b.h; the bark is longitudinally fissured, and dark grey in colour. The twigs often develop corky wings that may persist for several years. The leaves are usually obovate < 9 cm long by 5 cm broad (significantly smaller on juvenile trees) and chiefly characterized by their thick, leathery texture and obtusely doubly or simply toothed margins. The perfect, wind-pollinated apetalous flowers appear from March until May.
As implied by its name, ''U. macrocarpa'' is distinguished by its large, orbicular, wafer-like samarae < 50 mm in diameter, which ripen in May and June.〔Fu, L. & Jin J. (eds). (1992). ''China Red Data Book. Rare and endangered plants. Vol. 1''. Science Press, Beijing〕〔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. ()〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Ulmus macrocarpa」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|