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・ Ulva bifrons
・ Ulva brevistipita
・ Ulva burmanica
・ Ulva californica
・ Ulva chaetomorphoides
・ Ulva clathrata
・ Ulva compressa
・ Ulva conglobata
・ Ulva crassa
・ Ulva elegans
・ Ulva Ferry
・ Ulva flexuosa
・ Ulva grandis
・ Ulva intestinalis
・ Ulva Island (New Zealand)
Ulva lactuca
・ Ulva laingii
・ Ulva linza
・ Ulva ohnoi
・ Ulva paschima
・ Ulva polyclada
・ Ulva profunda
・ Ulva prolifera
・ Ulvaceae
・ Ulvaeus
・ Ulvah, Kentucky
・ Ulvales
・ Ulvan
・ Ulvaria
・ Ulvaria (alga)


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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)
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