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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 Isoetes riparia ： ウィキペディア英語版 Isoetes riparia ''Isoetes riparia'' (shore quillwort) is a species of quillwort in the Isoetaceae family. It can be found in rivers, creeks, and tidal mud flats in southern Quebec and southeastern Ontario, south to eastern New York.It has 5 to 35 long, erect bright green to yellow-green leaves, which are 6 to 35 centimeters long. The velum covers one fourth of the sporangium, which can be 7 millimeters long and 4 millimeters wide. The elongated ligule can grow to be 3 millimeters long. The spherical megaspores are 430 to 680 micrometers in diameter with closely set ridges. The kidney-shaped microspores are 24-35 micrometers long, and usually have spine-tipped tubercules. The megaspores can sometimes come to resemble that of either ''I. echinospora'', if the megaspores become eroded and bear projections that could resemble spines, or ''I. macrospora'', if the broken ridges take a certain shape.〔 ==References== 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「Isoetes riparia」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.