Water lilies are rooted in soil in bodies of water, with leaves and flowers floating on the surface. The leaves are round, with a radial notch in Nymphaea and Nuphar, but fully circular in Victoria. Water lilies are a well studied clade of plants because their large flowers with multiple unspecialised parts were initially considered to represent the floral pattern of the earliest flowering plants, and later genetic studies confirmed their evolutionary position as basal angiosperms. Analyses of floral morphology and molecular characteristics and comparisons with a sister taxon, the family Cabombaceae, indicate, however, that the flowers of extant water lilies with the most floral parts are more derived than the genera with fewer floral parts.
Horticulturally water lilies have been hybridised for temperate gardens since the nineteenth century, and the hybrids are divided into three groups: Hardy, night-blooming tropical, and day-blooming tropical water lilies. Hardy water lilies are hybrids from the subgenus Castalia; night-blooming tropical water lilies are developed from the subgenus Lotos (L.) Carl Ludwig WilldenowWilld.; and the day-blooming tropical plants arise from hybridisation of plants of the Brachyceras Casp. subgenus.
The water-lily shown here is the hardy "Pink Ribbon" Nymphaea hybrid.
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1. | PETREA | 10. | Simone, Germany | 19. | Kebo, Italy | 28. | booknerd | |
2. | CEREUS | 11. | Ulla Laiho | 20. | Eclectic Hamilton | 29. | Dawn | |
3. | PENNYROYAL | 12. | Jesh StG | 21. | GERBERA | 30. | Sara Chapman, Seattle USA | |
4. | SCARLET PIMPERNEL | 13. | Jocee NZ | 22. | Moni | 31. | veredit | |
5. | Ingmarie We/Refugium | 14. | ann nz | 23. | Pollen Puffs | 32. | Vilt og vakkert | |
6. | Aletta - Nowathome | 15. | ann 2 | 24. | Eva | 33. | McBryde Botanical Gardens Kauai | |
7. | Mascha | 16. | Enerhagen | 25. | christines welt | 34. | WoollyMuses | |
8. | Gunilla | 17. | islandrambles | 26. | willothewizp | |||
9. | Maboe | 18. | Frauke * Germany | 27. | Jim, Sydney, Australia |
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