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Isoetes echinospora : ウィキペディア英語版 | Isoetes echinospora
''Isoetes echinospora'', also known as Spiny Quillwort〔(Spiny Quillwort ) at www.plant-identification.co.uk. Retrieved 26 Aug 2015.〕 or Spring Quillwort〔(Spring Quillwort in the Online Atlas of the British and Irish Flora ). Retrieved 26 Aug 2015〕 is a species of quillwort in the Isoetaceae family, and is the most abundant species in Canada. It can be found in shallow aquatic environments from Labrador and Newfoundland to Alaska, and south to Pennsylvania, Wisconsin, Colorado, and California. In Germany it is found in only 2 locations: the Feldsee and Lake Titisee, both in the High Black Forest.〔Information Board at the Feldsee. Recorded on 26 Aug 2015.〕 It bears 10-30 green to yellow leaves and a two-lobed corm. The velum covers one to three quarters of the sporangium, which are 10 millimeters long. Round white megaspores are about 480 micrometers in diameter and are covered with spines. Kidney-shaped microspores are about 26 micrometers long with smooth, fine spines.〔 ''I. echinospora'' is sometimes considered a separate species from that found in Europe, and is given the name ''I. muricata''. ==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 echinospora」の詳細全文を読む
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