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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 howellii ： ウィキペディア英語版 Isoetes howellii Howell's quillwort (''Isoetes howellii'') is a species of quillwort, a type of lycopod. It is an aquatic plant native to western North America and grows in wet habitats such as vernal pools. It produces 5 to 28 pointed, cylindrical, bright green leaves that can reach 30 centimeters in length. The velum covers roughly one third of the spherical sporangia, which is 6 millimeters long. The ligule is in the shape of an elongated triangle. The megaspores are 420 to 610 micrometers in diameter. The coarse microspores are 25 to 30 micrometers long. It is closely related to ''I. melanopoda'' and was first thought to be a variation of that species. ==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 howellii」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.