Nymphaeaceae


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Nymphaeaceae

[‚nim·fē′ās·ē‚ē]
(botany)
A family of dicotyledonous plants in the order Nymphaeales distinguished by the presence of roots, perfect flowers, alternate leaves, and uniaperturate pollen.

Nymphaeaceae

 

(water lily), a family of dicotyledonous plants. They are perennial aquatic grasses with rhizomes and symmetrical, long-petioled leaves. The leaves, which often measure 2 m in diameter, usually have disks that float on the surface of the water. The flowers, which are on long stalks, are large (reaching 35 cm in diameter), solitary, and bisexual. There are four genera (approximately 60 species), distributed throughout the world except in the arctic and antarctic, in deserts, and on high mountains. Species of the genera Nuphar and Nymphaea grow in the USSR. Representatives of the genus Euryale are found in the Far East; these plants have been long cultivated in China for their edible seeds. Species of the genus Victoria are often raised in greenhouses. Some botanists separate the genera Nymphaea and Euryale into the family Euryalaceae. Others include the families Cabombaceae, Nelumbonaceae, and Barclayaceae in the family Nymphaeaceae.

REFERENCE

Takhtadzhian, A. L. Sistema i filogeniia tsvetkovykh rastenii. Moscow-Leningrad, 1966.
References in periodicals archive ?
The heterophylly occurs in Nymphaeaceae species only in the seedling stage (Hoehne, 1948; Sculthorpe, 1967); however, in the laboratory, it was not possible to verify the emergence of all eophylls because seedlings did not develop until the next adulthood.
1997) presentan una hipotesis alternativa en la cual miembros de los ordenes Laurales, o del ciado formado por el orden Magnoliales mas algunas paleohierbas ("Paleohierbas II", formadas por las Nymphaeaceae y Chloranthaceae, entre otras) son los posibles grupos hermanos de las monocotiledoneas (Fig.
The presence of anomocytic stomata on the adaxial epidermis corroborates the description by Mauseth (1988) and Gonzalez (2002) for the genus and that by Solereder (1908) for Nymphaeaceae.
Other submersed aquatics have solved the problem of low oxygen availability in standing water by developing air circulation patterns within the plant body, as is known for non-monocots such as Nymphaeaceae and Menyanthaceae.
For example, there are only two species of Nymphaeaceae in the Parana floodplain, whereas there are eight in the Pantanal that occur mainly in rain-fed shallow ponds and seasonal standing or slow flowing water in addition to in the river floodplain, except for Victoria amazonica, which grows in oxbow lakes.
Taxonomic work on aquatic plants in the Pantanal is as yet restricted to a few groups, such as Nymphaeaceae (Pott, 1998), Araceae-Lemnoideae (Pott and Cervi, 1999), Aeschynomene (Lima et al.
Em X Menyanthaceae Nymphoides humboldtiana (Kunth) Kuntze FL X X Nymphaeaceae Nymphaea amazonum Mart.
71) and positioned between Nymphaeaceae and Ceratophyllaceae.