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''Nymphaea oxypetala'' is a species of waterlily native to Bolivia, Brazil, Cuba, Ecuador, Paraguay, and Venezuela. It is a remarkable species with excessively acuminate and
acute sepals and petals."Flore des Serres et des Jardins de l'Europe 8: 120."
1853. (Mar 1853)
Unlike most other waterlilies, this species rarely produces floating leaves. The strongly reduced floating leaves are only produced very rarely.Ritter, N. P., Crow, G. E., & Wiersema, J. H. (2001)
"Nymphaea (Nymphaeaceae) in Bolivia: notes on several species, three new country records, and a key to species."
Rhodora, 103(915), 326-331. The smaller floating leaves are up to 6 cm large. The purplish-green, submerged, saggitate, membranous leaves are significantly larger with up to 30 cm big leaf blades. The broad submerged leaves display a likeness to the leaves of lettuce.Del Claro, K., Oliveira, P. S., & Rico-Gray, V. (2009). Tropical Biology and Conservation Management - Volume I: Natural History of Tropical Plants. p. 105. EOLSS Publications. https://books.google.com/books?id=oSDXCwAAQBAJ&dq=nymphaea%20oxypetala&pg=PA105 The petioles are fragile and leaves break of easily.
"Phylogenetic analysis of Nymphaeales using fast-evolving and noncoding chloroplast markers."
Botanical Journal of the Linnean Society, 154(2), 141-163.
"Aquatic macrophyte diversity of the Pantanal wetland and upper basin."
Brazilian Journal of Biology, 71, 255-263. These aquatic habitats are defined by the presence of moving water.Reinbold, Joan. (2023, November 13). Lentic & Lotic Ecosystems. sciencing.com. Retrieved from https://sciencing.com/lentic-lotic-ecosystems-7355077.html It occurs in floodplains, river branches and in seasonal streams.Damasceno-Junior, G. A., & Pott, A. (2022). Flora and vegetation of the Pantanal Wetland. p. 241. Springer Nature. https://books.google.com/books?id=ZiFnEAAAQBAJ&dq=nymphaea%20oxypetala&pg=PA241 In the Pantanal it occurs in the flooding area of the Paraguay River, Nabileque, Abobral and Poconé. In the Bolivian Pantanal, ''Nymphaea oxypetala'' was observed growing at depths of up to 2 m in gaps amid mats of floating vegetation and in localities where human activities prevented the growth of such floating mats along the margins.
"Nymphaeaceae do Brasil."
SITIENTIBUS série Ciências Biológicas, 21. https://doi.org/10.13102/scb4986
"Nymphaeaceae, ''Nymphaea belophylla'' Trickett: new state record."
Check List, 9(2), 440-442.
"The Nymphaeaceae family in the Pantanal, Mato Grosso and Mato Grosso do Sul, Brazil."
Acta Botanica Brasilica, 12, 183-194.
1853. (Mar 1853)
Description
Vegetative characteristics
Unlike most other waterlilies, this species rarely produces floating leaves. The strongly reduced floating leaves are only produced very rarely.Ritter, N. P., Crow, G. E., & Wiersema, J. H. (2001)"Nymphaea (Nymphaeaceae) in Bolivia: notes on several species, three new country records, and a key to species."
Rhodora, 103(915), 326-331. The smaller floating leaves are up to 6 cm large. The purplish-green, submerged, saggitate, membranous leaves are significantly larger with up to 30 cm big leaf blades. The broad submerged leaves display a likeness to the leaves of lettuce.Del Claro, K., Oliveira, P. S., & Rico-Gray, V. (2009). Tropical Biology and Conservation Management - Volume I: Natural History of Tropical Plants. p. 105. EOLSS Publications. https://books.google.com/books?id=oSDXCwAAQBAJ&dq=nymphaea%20oxypetala&pg=PA105 The petioles are fragile and leaves break of easily.
Generative characteristics
The nocturnal flowers float on the water surface. The stamens are purple. The cream-coloured, 2 cm long carpellary appendages are abruptly folded at the apex. They are the longest carpellary appendages of all ''Nymphaea'' species. The floral fragrance has been described as ether-like.Cytology
The chromosome count of this polyploid species is 6n = 84.Loehne, C., Borsch, T., & Wiersema, J. H. (2007)"Phylogenetic analysis of Nymphaeales using fast-evolving and noncoding chloroplast markers."
Botanical Journal of the Linnean Society, 154(2), 141-163.
Reproduction
Vegetative reproduction
This species is likely not stoloniferous.Wiersema, J. H. (1987). A monograph of ''Nymphaea'' subgenus ''Hydrocallis'' (Nymphaeaceae). Systematic Botany Monographs, 1-112. Proliferating pseudanthia are also lacking in ''Nymphaea oxypetala''.Pellegrini, M. O. O. & Jardim Botânico do Rio de Janeiro. (n.d.). Nymphaea oxypetala Planch. Flora E Funga Do Brasil. Retrieved November 24, 2023, from https://floradobrasil.jbrj.gov.br/FB118426Generative reproduction
Flowering occurs throughout March to August.Ecology
Habitat
It is associated with lotic habitats,Pott, V. J., Pott, A., Lima, L. C. P., Moreira, S. N., & Oliveira, A. K. (2011)"Aquatic macrophyte diversity of the Pantanal wetland and upper basin."
Brazilian Journal of Biology, 71, 255-263. These aquatic habitats are defined by the presence of moving water.Reinbold, Joan. (2023, November 13). Lentic & Lotic Ecosystems. sciencing.com. Retrieved from https://sciencing.com/lentic-lotic-ecosystems-7355077.html It occurs in floodplains, river branches and in seasonal streams.Damasceno-Junior, G. A., & Pott, A. (2022). Flora and vegetation of the Pantanal Wetland. p. 241. Springer Nature. https://books.google.com/books?id=ZiFnEAAAQBAJ&dq=nymphaea%20oxypetala&pg=PA241 In the Pantanal it occurs in the flooding area of the Paraguay River, Nabileque, Abobral and Poconé. In the Bolivian Pantanal, ''Nymphaea oxypetala'' was observed growing at depths of up to 2 m in gaps amid mats of floating vegetation and in localities where human activities prevented the growth of such floating mats along the margins.
Taxonomy
Type specimen
The type specimen was collected by W. Jameson in March 1845 in Ecuador near Guayaquil.Lima, C. T. de, Machado, I. C., & Giulietti, A. M. (2021)"Nymphaeaceae do Brasil."
SITIENTIBUS série Ciências Biológicas, 21. https://doi.org/10.13102/scb4986
Placement within ''Nymphaea''
It is placed within ''Nymphaea'' subg. ''Hydrocallis''.de Andrade Amador, G., Damasceno-Júnior, G. A., da Silva, R. H., Pott, A., & Pott, V. J. (2013)"Nymphaeaceae, ''Nymphaea belophylla'' Trickett: new state record."
Check List, 9(2), 440-442.
Etymology
The specific epithet ''oxypetala'' refers to the pointed petals of this species.Pott, V. J. (1998)"The Nymphaeaceae family in the Pantanal, Mato Grosso and Mato Grosso do Sul, Brazil."
Acta Botanica Brasilica, 12, 183-194.
Conservation
The conservation status in Brazil is not evaluated (NE).Cultivation
It is kept as an aquarium plant, as well as in small containers of water.Breukel, H. (n.d.). ''Nymphaea oxypetala'' Planchon. Seerosenforum.de Das Portal Der Seerose. Retrieved November 12, 2023, from https://www.seerosenforum.de/gattung/Hydrocallis/oxypetala/oxypetala.aspx It is intolerant of cold, turbid and saline water and favours clear, slowly flowing freshwater.References
{{Taxonbar, from=Q15481631 oxypetala Flora of Bolivia Flora of Brazil Flora of Cuba Flora of Ecuador Flora of Paraguay Flora of Venezuela Flora of Southern America Plants described in 1852