Nymphaea rudgeana G.Mey. fruit with characteristic carpellary appendages
Vegetative characteristics
Species of Nymphaea subg. Hydrocallis are perennial, rhizomatous, aquatic herbs with contractile roots. The floating, petiolate leaves are orbicular to elliptic and have an entire margin.[4]
Generative characteristics
The flowers are nocturnal and float on the water surface.[6][4] The carpels have enlarged, clavate carpellary appendages.[6][1] The flowers emit solvent-like, pungent, fermented, or fruity fragrances.[7]
Taxonomy
Publication
It was first described as Nymphaea sect. Hydrocallis Planch. by Jules Émile Planchon in 1853. Later, it was elevated to the status of the subgenus Nymphaea subg. Hydrocallis (Planch.) Conard by Henry Shoemaker Conard in 1905.[1][3][5][8][2]
The distribution of species within this subgenus extends from the southern United States through Central America, and the Caribbean to South America.[1]
Ecology
Pollination
Flowers of Nymphaea subg. Hydrocallis are pollinated by Cyclocephala beetles.[7][10]
References
^ abcdede Lima, C. T., Machado, I. C., & Giulietti, A. M. (2021). "Nymphaeaceae of Brasil." Sitientibus série Ciências Biológicas, 21.
^ abNymphaea sect. Hydrocallis | International Plant Names Index. (n.d.). Retrieved January 23, 2024, from https://www.ipni.org/n/77303563-1
^ abMissouri Botanical Garden. (n.d.-d). Nymphaea subg. Hydrocallis (Planch.) Conard. Tropicos. Retrieved December 2, 2024, from https://www.tropicos.org/name/100411299
^ abcWiersema, J. H. (1987). A monograph of Nymphaea subgenus Hydrocallis (Nymphaeaceae). Systematic Botany Monographs, 1-112.