Overview

Brief Summary

Nymphaea is a genus of 35–40 species of showy-flowered aquatic plants in the Nymphaeaceae (water-lily family) native to temperate, subtropical, and tropical regions in all continents except Antarctica, but with most species in the Northern Hemisphere. Numerous hybrids and cultivars of different colors, foliage patterns, fragrances, hardiness, and blooming times (day vs. night) have been developed, and are popular as ornamentals in water gardens around the world. Despite the name, water-lilies are not true lilies (which would belong to the family Liliaceae). The genus name is derived from Greek mythology, from the lesser deity Nymphe, a water nymph.

In their native habitats, water-lilies typically grow in mostly freshwater ponds, lakes, and quiet backwaters. They may be deciduous or evergreen perennials that grow from thick rootstocks or tubers, rooted underwater at depths of 8 cm (3 inches) to two meters (6 feet). Leaves are circular to oval, 4–50 cm wide, notched at the petiole (stem), and generally float on the water surface. Flowers, which range from 2–30 cm in diameter, have 4 sepals and numerous petals and stamens, and may be white, yellow, pink, red, violet, or blue. In addition to producing fruits, some of the tropical species propagate viviparously, producing young plantlets at the base of leaves or from tubers that develop in the flowers.

Water-lilies have been admired since antiquity, and are depicted in Egyptian art and artifacts from 4,000 B.C. Starting in the 1850s, plant breeders in Europe and the United Kingdom perfected methods for hybridizing them, spurring the development of thousands of cultivars. A Texas water-lily enthusiast maintains a collection of over 4,000 cultivars (as described in this New York Times September 2011 profile). Water-lilies are also famous as subject of a series of 250 oil paintings by Claude Monet (see Wikipedia).

Leaves, roots, and seeds of some Nymphaea species are edible, and have various traditional medicinal uses (see PFAF 2011).

(Atsma 2011, Everett 1981, FNA 2011, Knotts 2011, Lawson 1851, PFAF 2011, Slocum 2005, Wikipedia 2011)

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Comprehensive Description

Description

Aquatic perennial. The floating leaves grow from a tuberous rhizome. the erect flowers are usually held above the surface of the water on fleshy stems.
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Description

Aquatic herbs. Leaf lamina elliptic to subcircular, deeply cordate, peltate. Sepals 4, green. Petals 5-many, inner ones shorter and narrower, grading into the stamens. Stamens with petaloid filaments. Carpels numerous, many-ovulate. Fruit a large fleshy berry, ripening under water. Seeds floating owing to a pulpy sack-like aril.
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Distribution

Localities documented in Tropicos sources

Nymphaea L.:
Brazil (South America)
Ecuador (South America)
Honduras (Mesoamerica)
United States (North America)
Colombia (South America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Worldwide distribution

Widespread from Egypt, throughout tropical Africa to KwaZulu-Natal, S Africa.
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Ecology

Habitat

Depth range based on 22 specimens in 4 taxa.

Environmental ranges
  Depth range (m): 1.25 - 1.25
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Associations

Foodplant / shot hole causer
superficial, clumped mycelium of Ramularia anamorph of Colletotrichum nymphaeae causes shot holes on live leaf of Nymphaea

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:34Public Records:5
Specimens with Sequences:28Public Species:2
Specimens with Barcodes:27Public BINs:0
Species:9         
Species With Barcodes:7         
          
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Barcode data

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Nymphaea

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Wikipedia

Nymphaea

Nymphaea /nɪmˈfə/ (water lily) is a genus of hardy and tender aquatic plants in the family Nymphaeaceae. There are about 50 species in the genus, which has a cosmopolitan distribution.

Contents

Name

The name Nymphaea comes from the Greek term "Νυμφαία", possibly related to "Νύμφη" meaning "nymph". The nymphs in Greek mythology were supernatural feminine beings associated with springs, so the application of the name to delicately flowered aquatic plants is understandable. Despite its common name "water lily" (water-lily, waterlily), Nymphaea is not related to the true lily, Lilium.

Description

The main plant is submerged, with large floating, plate-like leaves and showy flowers in many different colours produced in spring. Blue flowers are only produced by the tender species, e.g. N. caerulea. The fruits, containing many seeds, are produced in the autumn, and are also submerged. The leaves have a radial notch from the circumference to the petiole (leaf stem) in the center.

Classification

Nymphaea (Egyptian lotus) is not related to the Chinese and Indian lotus of genus Nelumbo. But it is closely related to Nuphar, another genus commonly called "lotus". In Nymphaea, the flower petals are much larger than the sepals, whereas in Nuphar the petals are much smaller than its sepals. The fruit maturation also differs, with Nymphaea fruit sinking below the water level immediately after the flower closes, whereas Nuphar fruit are held above water level to maturity.

Cultural significance

Blue lotus symbol (Nymphaea caerulea) among other ancient Egyptian symbols on an 18th Dynasty jar. Found at Amarna in the 19th century.

The ancient Egyptians revered the Nile water-lilies, or lotuses as they were also called. The lotus motif is a frequent feature of temple column architecture.

The Egyptian Blue Water-lily, N. caerulea, opens its flowers in the morning and then sinks beneath the water at dusk, while the Egyptian White Water-lily, N. lotus, flowers at night and closes in the morning. This symbolizes the Egyptian separation of deities and is a motif associated with Egyptian beliefs concerning death and the afterlife. The recent discovery of psychedelic properties of the blue lotus may also have been known to the Egyptians and explain its ceremonial role.[citation needed] Remains of both flowers have been found in the burial tomb of Ramesses II.

In Roman culture, there was a belief that drinking a liquid of Nymphaea pounded to a paste and drunk in vinegar for ten consecutive days turned a boy into a eunuch.

A Syrian terra-cotta plaque from the 14th-13th century B.C.E. shows the goddess Asherah holding two lotus blossoms. An ivory panel from the 9th-8th century B.C.E. shows the god Horus seated on a lotus blossom, flanked by two Cherubs.[1]

The French painter Claude Monet is famous for his paintings of water lilies.

Cultivation

Water-lilies are not only highly decorative, but provide useful shade which helps reduce the growth of algae in ponds and lakes.[2] Many of the water-lilies familiar in water gardening are hybrids. The following cultivars have gained the Royal Horticultural Society's Award of Garden Merit:-

  • 'Escarboucle'[3] (orange-red)
  • 'Gladstoniana'[4] (double white flowers with prominent yellow stamens)
  • 'Gonnère'[5] (double white scented flowers)
  • 'James Brydon;'[6] (cupped rose-red flowers)
  • 'Marliacea Chromatella'[7] (pale yellow flowers)
  • 'Pygmaea Helvola'[8] (cupped fragrant yellow flowers)

Other Uses

Water lilies have several edible parts. The young leaves and unopened flower buds can be boiled and served as a vegetable. The seeds, high in starch, protein, and oil, may be popped, parched, or ground into flour. Potato-like tubers can be collected from the species N. tuberosa.[9]

Taxonomy

Subdivisions of genus Nymphaea:[10]

Subgenus:
Anecphya
Brachyceras
Hydrocallis
Lotos
Nymphaea:
Nymphaea Chamaenymphaea
Nymphaea Nymphaea
Nymphaea Xanthantha

Gallery

References

  1. ^ William G. Dever; Did God have a Wife? Archeology and Folk Religion in Ancient Israel; page 221, 279.
  2. ^ RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964. 
  3. ^ http://apps.rhs.org.uk/plantselector/plant?plantid=1337
  4. ^ http://apps.rhs.org.uk/plantselector/plant?plantid=1337
  5. ^ http://apps.rhs.org.uk/plantselector/plant?plantid=1338
  6. ^ http://apps.rhs.org.uk/plantselector/plant?plantid=1339
  7. ^ http://apps.rhs.org.uk/plantselector/plant?plantid=5544
  8. ^ http://apps.rhs.org.uk/plantselector/plant?plantid=1341
  9. ^ Peterson, Lee Allen (1977). A field guide to the wild edible plants of Eastern and Central North America. New York, New York: Houghton Mifflin. p. 22. 
  10. ^ Subdivisions of genus Nymphaea
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