There is one mistake in the above information. The plant *Nymphoides
indicum(Kumud) *actually does not belong to the above family but belongs to
*MENYANTHACEAE *family.
Satish*
*
2008/10/30 satish phadke <[EMAIL PROTECTED]>

>
> FAMILY OF THE WEEK : NYMPHACEAE
> The family is represented by 8 genera and about 90 species most abundant in
> tropics. In India there are 4 genera and 7 species occurring throughout
> India.
> Vegetative characters :
> They are perennial aquatic herbs with a creeping or erect sympodial
> rhizome. There is a scattered arrangement of vascular bundles.
> The leaves are usually large, simple and long petioled, arising from the
> root stalk or from the slender floating stem (Cabomba). They are usually
> floating or sometimes emerged as in Nelumbo. often peltate.
> Inflorescence and flowers :
> The flowers are axillary, solitary, long peduncled, and float on the
> surface or raised much above the water(Nelumbo) or partially submerged. The
> flowers are large showy, often sweet scented, bisexual, actinomorphic,
> hypogynous or more or less epigynous and acyclic to cyclic.
> The calyx and corolla are poorly differentiated. The calyx is composed of
> 3-5 sepals. The sepals are distinct and green or coloured and petioled.
> The corolla is polypetalous with three to indefinite and variously
> coloured or white showy petals. In Nymphea numerous spirally arranged petals
> gradually pass into stamens.
> The androecium is composed of three to indefinite distinct stamens. The
> gynoecium is of two to three to numeruos carpels. In Nelumboideae there are
> a large number of carpels which are embedded separately in round pits which
> are on the flat upper surface of of a swollen spongy and obconical
> receptacle.
> Fruits and seeds :
> In Cabomboideae the fruit is a closed indehiscent follicle with one to
> three pendulous seeds. In Nelumboideae the fruit is indehiscent one seeded
> nutlet. The seeds are with a large embryo and with no endo ro perisperm. In
> Nymphaeoideae the fruit is a spongy berry with numerous seeds and it
> dehisces by swelling of mucilage. The seeds have small embryo and endosperm
> and abundant perisperm.
> Pollination and seed dispersal :
> Bright and showy fragrant flowers favour pollination by insect, flies and
> small beetles.Seed dispersal is mostly by water. Somespecies of Nuphar,
> Brasenia, and Cabomba are dispersed by ducks which eat the pulp of these
> fruits greedily.
> Examples :
> Nelumbo nucifera (Lotus) Kamal Nymphaea nauchali(Indian red water Lily) 
> Nymphaea
> stellata(Indian blue water Lily) Nymphaea alba (European white water Lily)
> Victoria amazonica(Royal water Lily)
>
> --
>
> http:// satishphadke.blogspot.com
>



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