| 翻訳と辞書 |
| Isoetes maritima ： ウィキペディア英語版 |
Isoetes maritima
The maritime quillwort (''Isoëtes maritima'') is a quillwort in the Isoetaceae family. It is native to Alaska, British Columbia, and Washington State.〔〔L. Underwood, Botanical Gazette 13: 94. 1888.〕 It bears eight to fifteen dark green, erect, rigid leaves that are each two to five centimeters long and 1.5 millimeters wide. The oval sporangia are small and inconspicuous, measuring at four millimeters long. The velum covers a third to a half of the sporangia. The white microspores are kidney-shaped and 30-36 micrometers long. The white megaspores are spherical and 490-670 micrometers in diameter. It is similar to ''I. echinospora'', but with blunt spines and crests on the megaspores. ''I. echinospora'' has sharp, thin spines, though most of the other species in the genus have no megasporal spines.〔(Flora of North America vol 2. )〕 The epithet "''maritima''" and the common name "maritime quillwort", meaning "of the sea or ocean", are misnomers. Because it was first discovered by Macoun near tidal flats in British Columbia, it was treated as a coastal species. Since that time, however, it has been found in fresh-water lakes and streams.〔
==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 maritima」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.
|
|