|
Wrack is part of the common names of several species of seaweed in the family Fucaceae. It may also refer more generally to any seaweeds that wash up on beaches and may accumulate in the wrack zone. It consists largely of species of ''Fucus'' — brown seaweeds with flat branched ribbon-like fronds, characterized in ''F. serratus'' by a saw-toothed margin and in ''F. vesiculosus'', another common species, by bearing air-bladders. Another component of sea wrack may be ''Zostera marina'', so-called sea-grass, a marine flowering plant with bright green long narrow grass-like leaves. *"Bladder wrack", ''Fucus vesiculosus'' *"Channelled wrack", ''Pelvetia canaliculata'' *"Knotted wrack", ''Ascophyllum nodosum'' *"Spiral wrack" or "flat wrack", ''Fucus spiralis'' *"Toothed wrack" or "serrated wrack", ''Fucus serratus'' Historically wrack was used for making manure, and for making "kelp", a form of potash. ==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「Wrack (seaweed)」の詳細全文を読む スポンサード リンク
|