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Halophila decipiens : ウィキペディア英語版 | Halophila decipiens
''Halophila decipiens'', commonly known as Caribbean seagrass or paddle grass, is a seagrass in the family Hydrocharitaceae. It grows underwater on sandy or muddy sea floors in shallow parts of tropical seas. ==Description== ''Halophila'' is the only genus of seagrass that lacks basal sheaths on the leaf stems. ''Halophila decipiens'' has thin rhizomes that run along near the surface of sand or mud, with a root at each node to anchor the plant in place. The almost stemless leaves grow in pairs from the nodes with a pair of scales at their base. The leaves are paddle-shaped and have a finely serrated margin and are up to long and wide. Male and female flowers are found on the same spathe and a female flower can produce about 30 seeds. Flowering seems to be stimulated by a rise in water temperature above a certain threshold rather than day length. The plant is an annual.〔(''Halophila engelmannii'' star grass ) Florida Fish and Wildlife Conservation Commission. Retrieved 2012-01-28.〕〔(''Halophila decipiens'' (Paddle grass) ) Smithsonian Marine Station at Fort Pierce. Retrieved 2012-01-29.〕
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