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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Potamogeton berchtoldii ： ウィキペディア英語版 Potamogeton berchtoldii ''Potamogeton berchtoldii'', common name small pondweed〔 is an aquatic plant. ==Description== Small pondweed is a fine-leaved pondweeds with a bushy habit. It lacks a perennial rhizome and the plants die back in winter into a large number of resting buds known as turions. The stems are very slender and do not usually exceed 60 cm.〔 The leaves are flat, usually 25–50 mm long, and less than 2 mm wide, usually with a broad band of lacunae along each side of the midrib and coloured pale green, olive green or brownish green.〔 The open stipules and shining nodal glands can be important characters in identification. Small pondweed is similar to several other ''Potamogeton'' species, especially ''P. pusillus'', and use of a good key such as Preston (1995) is strongly recommended. It could also be confused with ''P. trichoides'' and ''P. obtusifolius''. Hybrids have been described with ''P. trichoides'' (''P''. × ''franconicus'' G.Fisch.), ''P. pusillus'' (''P''. × ''mucronulatus'' (G.Fisch.) Papch.), ''P. natans'', ''P. polygonifolius'', ''P. coloratus'' (''P''. × ''lanceolatus'' Sm.), ''P. perfoliatus'' (''P''. × ''mysticus'' Morong), ''P. natans'' (''P''. × ''variifolius'' Thore), and ''P. acutifolius'' (''P.'' × ''sudermanicus'' Hagstr.), but all are rare.〔〔 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「Potamogeton berchtoldii」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.