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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 tuckermanii ： ウィキペディア英語版 Isoetes tuckermanii ''Isoetes tuckermanii'' (Tuckerman's quillwort) is a tetraploid species of quillwort in the Isoetaceae family. It can be found in shallow water in Newfoundland, Nova Scotia, New Brunswick, and south through the New England states to Maryland. It bears 10 to 45 long bright green to yellow green leaves that are 4 to 25 centimeters long, usually erect, but sometimes recurved. The velum covers one fourth or less of the sporangium, which is usually unspotted, 5 millimeters long, and 3 millimeters wide. The white spherical megaspores are 400 to 650 micrometers in diameter, and bear rough-crested ridges that form a hexagonal honeycomb shape. The kidney shaped microspores are 24 to 33 micrometers long, bearing tubercles.〔 It is very similar to ''I. macrospora'', only reliably distinguishable by cytology or through careful megaspore measurement. ==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 tuckermanii」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.