Nymphaea 'Edelweis' (Hardy Water Lily, Waerlily)

Common Names

Common Names in English:

Hardy Water Lily, Waerlily

Description

Family Nymphaeaceae

Herbs perennial or rarely annual , aquatic . Stems rhizomatous ; rhizomes erect or repent , branched or unbranched. Leaves arising from rhizome, simple , alternate, floating, emersed , or submersed , long petiolate but short petiolate on submersed vernal ones; leaf blade undivided, usually with a basal sinus, often peltate. Flowers solitary, axillary , long pedunculate , bisexual , hypogynous to epigynous , actinomorphic , entomophilous, mostly emergent. Sepals 4--7, usually green, occasionally petaloid . Petals numerous (rarely absent), distinct , usually showy, often transitional to stamens. Stamens numerous; anthers introrse , dehiscent by longitudinal slits; connective sometimes appendaged. Pistil 1, compound ; carpels 5--many, partially or completely united , surrounding a sometimes projecting floral axis. Ovary multilocular; placentation laminar ; ovules numerous. Styles absent or modified into abaxially projecting carpellary appendages . Stigmas radiate on distal surface, often disclike. Fruit berrylike, many seeded, irregularly dehiscent. Seeds mostly arillate ; endosperm little, perisperm abundant; embryo small; cotyledons 2, fleshy .

Six genera and ca. 70 species: widespread in temperate and tropical regions ; three genera and eight species in China.Dezhi Fu, John H. Wiersema & Donald Padgett "Nymphaeaceae". in Flora of China Vol. 6 Page 115. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.

Genus Nymphaea

Rhizomes branched or unbranched, erect or repent ; elongate stolons present or absent. Leaves mostly floating (vernal leaves submersed ; blades sessile, broad) . Leaf blade orbiculate to widely ovate or elliptic , basal lobes divergent to overlapping, margins entire to spinose-dentate, apex of lobe acute or acuminate to widely rounded ; primary venation mostly palmate, midrib with 1 vein . Flowers floating or emersed , opening diurnally or nocturnally; perianth perigynous, spreading at anthesis ; sepals 4, mostly greenish, ovate to elliptic; petals 8-many, spirally arranged or wholly or partially whorled , showy, white, pink, blue, or yellow, broadly lanceolate or ovate to obovate , grading into stamens; stamens yellow or cream-colored, inserted on lateral surface of ovary, spreading at anthesis, sometimes with distal connective appendage ; ovary shorter than petals and stamens; stigmatic disk with prominent , distinct , upwardly incurved appendages around margin. Fruits borne on curved or coiled peduncles . Seeds nearly globose to ellipsoid , to 5 mm; aril present. x = 14.

Species 35-40: worldwide.

Nymphaea is an important genus of ornamental plants , with numerous cultivars or wild forms grown in water gardens. Some have become naturalized in some places, particularly in Florida, and two such taxa are included in this treatment. A third, N . × daubenyana W. T. Baxter ex Daubeny ( N . micrantha Guillemin & Perrottet × N . caerulea Savigny), with blue flowers and entire leaves and with a proliferous mound of fibrous tissue above insertion of petiole , may also be encountered in Florida.

Prior to conservation in its current sense, the name Nymphaea was frequently used for the genus now known as Nuphar.John H. Wiersema "Nymphaea". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org.

Physical Description

Flowers: Blooms repeatedly from mid spring to early fall . Flowers are held close to the water, and remain open for 3-4 days each. • Bloom Period: June, July, August.

Foliage: Summer foliage: Shiny leaves have a radial notch from the circumference to the petiole in the center.

Size/Age/Growth

Size: 3-12' spread .

Landscaping

Landscape Uses: Bogs . Water gardens. • Care: Remove flowers during the first year to allow the plant to establish. Before winter, move to the deepest ice-free part of your pond . If temperatures will drop below -10°F., remove from pond and store inside, in their pots, in airtight bags in a cool, non-freezing place. Do not let them dry out.

Biology

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Growth

Culture: Space 4-6' apart in still water , avoiding fountains , waterfalls , and other moving water. Plant at the recommended depth, or plants may not flower. Propagate by washing off the soil and detaching a piece of rhizome with a vigorous growing point , potting it separately.

Soil: Soil may range from sand to clay , with a pH of 7 to 8.5. Covering soil with small stones will reduce mud in your pond . • Minimum pH: 6.1 • Maximum pH: 7.5

Sunlight: Sun Exposure: Full Sun .

Temperature: Minimum Temperature (F): 33°F. is the minimum water temperature , to ensure that rhizomes do not freeze. • Cold Hardiness: 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b, 11. (map)

Taxonomy

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Domain: Eukaryota () - Whittaker & Margulis,1978
- Kingdom: Plantae () - Haeckel, 1866 - Plants
  - Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
    - Phylum: Tracheophyta () - Sinnott, 1935 Ex Cavalier-Smith, 1998 - Vascular Plants
      - Subphylum: Euphyllophytina ()
        Infraphylum: Radiatopses () - Kenrick & Crane, 1997
        Class: Magnoliopsida () - Brongniart, 1843 - Dicotyledons
        Subclass: Nymphaeidae () - (Horan., 1834) J.w. Walker Ex Takhtajan, 1997
        Superorder: Nymphaeanae () - (Dumortier, 1829) Thorne Ex Reveal, 1992
        Order: Nymphaeales () - Dumortier, 1829
        Family: Nymphaeaceae () - Salisbury, 1805 - Water-Lily Family
        Subfamily: Nymphaeoideae ()
        Tribe: Nymphaeeae ()
        Genus: Nymphaea () - Linnaeus, Sp. Pl. 1: 510. 1753; Gen. Pl. ed. 5, 227, 1754. - Water-lily [Greek nymphaia and Latin nymphaea, water-lily, from Latin ( nympha ) or Greek ( nymphe ) mythology, goddess of mountains, waters, meadows, and forests]
        Cultivar: Edelweis
        Botanical name: - Nymphaea 'Edelweis'

Similar Species

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Members of the genus Nymphaea

There are approximately 1342 species in this genus. Here are just 100 of them:

Bibliography

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Kuan Ke-chien. 1979. Nymphaeaceae subfam. Nymphaeoideae. Fl. Reipubl. Popularis Sin. 27: 615.
Conard, H. S. 1905. The waterlilies: A monograph of the genus Nymphaea. Publ. Carnegie Inst. Wash. 4: 1-279.
Meeuse, B. J. D. and E. L. Schneider. 1980. Nymphaea revisited: A preliminary communication. Israel J. Bot. 28: 65-79.
Moseley, M. F. Jr. 1961. Morphological studies of the Nymphaeaceae. II. The flower of Nymphaea. Bot. Gaz. 122: 233-259.
Ward, D. B. 1977. Keys to the flora of Florida. 4. Nymphaea (Nymphaeaceae). Phytologia 37: 443-448.
Wiersema, J. H. 1987. A monograph of Nymphaea subgenus Hydrocallis (Nymphaeaceae). Syst. Bot. Monogr. 16: 1-112.
Wiersema, J. H. 1988. Reproductive biology of Nymphaea (Nymphaeaceae). Ann. Missouri Bot. Gard. 75: 795-804.

More Info

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Notes

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Contributors

Brands, S.J. (comp.) 1989-2007. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed March 31, 2007.

Identifiers

Zipcode Zoo Species Identifier: 949783

Nymphaea 'Edelweis'

Common Names

Description

Family Nymphaeaceae

Genus Nymphaea

Physical Description

Size/Age/Growth

Landscaping

Biology

Growth

Taxonomy

Similar Species

Members of the genus Nymphaea

Bibliography

More Info

Notes

Contributors

Identifiers

Footnotes