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Ulva lactuca : ウィキペディア英語版 | Ulva lactuca
''Ulva lactuca'' Linnaeus, a green alga in the division Chlorophyta, is the type species of the genus ''Ulva'', also known by the common name sea lettuce. ==Description== ''Ulva lactuca'' is a thin flat green alga growing from a discoid holdfast. The margin is somewhat ruffled and often torn. It may reach or more in length, though generally much less, and up to across.〔(【引用サイトリンク】work=Gettysburg College )〕 The membrane is two cells thick, soft and translucent, and grows attached, without a stipe, to rocks or other algae by a small disc-shaped holdfast. Green to dark green in colour, this species in the Chlorophyta is formed of two layers of cells irregularly arranged, as seen in cross-section. The chloroplast is cup-shaped in some references but as a parietal plate in others〔 with one to three pyrenoids. There are other species of ''Ulva'' which are similar and not always easy to differentiate.
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「Ulva lactuca」の詳細全文を読む
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