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''Nymphaea mexicana'' is a species of aquatic plant that is native to the Southern United States and Mexico as far south as Michoacán.〔〔(Biota of North America Program 2014 county distribution map )〕 Common names include yellow waterlily, Mexican waterlily and banana waterlily. ''Nymphaea mexicana'' is perhaps best known as a noxious weed in wetlands outside of its native range, such as California. It can easily invade similar aquatic ecosystems when it is introduced. The plant is attractive and has been introduced to new habitats for ornamental purposes. ''Nymphaea mexicana'' has thick rhizomes and long, spongy creeping stolons which bear bunches of small yellow roots that resemble miniature bananas. The plant can grow from seedlings or send out new shoots from its stolons. The large, flat leaves are green with purple or brown patterning, and float on the surface of the water. The floating lotus flowers have yellow petals and pointed, star-like, greenish-yellow sepals. The flowers close at night. 〔(Flora of North America, ''Nymphaea mexicana'' Zuccarini, 1832.Banana water-lily, yellow water-lily, herbe au coeur )〕 The plant flowers during the summer, and also during spring and fall in warmer areas. Seeds are contained in green berries which grow underwater. It grows in marshes and readily invades canals and other shallow waterways, sometimes becoming a nuisance. The canvasback duck feeds on the banana-like roots of the plant. ==Gallery== Nymphaea mexicana (27) 1200.jpg Nymphaea mexicana (21) 1200.jpg 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「Nymphaea mexicana」の詳細全文を読む スポンサード リンク
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