Nymphaea × daubenyana is a species of waterlily endemic to Chad, which has also been introduced to the USA (Florida) and Sri Lanka. It is a natural hybrid of Nymphaea micrantha and Nymphaea nouchali var. caerulea.
Description
Vegetative characteristics It has a tuberous rhizome. The cordate, elliptical-roundish, 30 cm wide leaves have an entire margin. The adaxial surface is coloured brightly green with red marks. The abaxial leaf surface is pale - brownish red. Proliferating tissue is found on the leaf blade above the attachment point of the petiole.De Thabrew, W. V. (2014). "A Manual of Water Plants." pp. 181-182. USA: AuthorHouse. Generative characteristics The blue flowers are 10 cm wide. The narrow petals have an acute apex.Nymphaea in Flora of North America @ efloras.org. (n.d.). Retrieved December 28, 2023, from http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=122531 The ovules are bitegmic and anatropous.Kraehmer, H. (2019). "Grasses: Crops, Competitors, and Ornamentals." p. 95. John Wiley & Sons. The flowers are fragrant.Niklitschek, A. (1955). "Vom Zimmergarten der Zukunft: neue Tatsachen und Probleme." p. 190. Deutschland: Bruckmann.Rodd, T., Bryant, G., & Barnard, L. (2007). "The plant finder: The Right Plants for Every Garden." p. 521. Richmond Hill, Ont. : Firefly Books. Cytology A chromosome count of 89 or 87 chromosomes has been reported.Tischler, G. F. L. (1953). "Allgemeine Pflanzenkaryologie: Ergänzungsband: Angewandte Pflanzenkaryologie." p. 445. Deutschland: Gebr. Borntraeger. The diploid chromosome count has also been reported to be 2n = 42.Hossain, A., Kabir, G., Ud-deen, M. M., & Alam, A. M. S. (2007). "Cytological studies of Nymphaea species available in Bangladesh." Journal of Bio-Science, 15, 7-13.
Reproduction Vegetative reproduction through foliar proliferation occurs in Nymphaea × daubenyana.Labarre, E. J. (1935). “Viviparous” Succulents. The Cactus Journal, 4(2), 36–37. http://www.jstor.org/stable/42784943Schmucker, Th. (1932). PHYSIOLOGISCHE UND ÖKOLOGISCHE UNTERSUCHUNGEN AN BLÜTEN TROPISCHER NYMPHAEA-ARTEN. Zeitschrift Für Wissenschaftliche Biologie. Abteilung E. Planta, 16(2), 376–412. http://www.jstor.org/stable/23841796
Taxonomy It was first named by W.T.Baxter, but only later validly published by Charles Giles Bridle Daubeny (1795-1867) in 1864. It is placed in the subgenus Nymphaea subg. Brachyceras.Weidlich, W. H. (1976). The Organization of the Vascular System in the Stems of the Nymphaeaceae. II. Nymphaea Subgenera Anecphya, Lotos, and Brachyceras. American Journal of Botany, 63(10), 1365–1379. https://doi.org/10.2307/2441845 Etymology It is named after Professor Charles Giles Bridle Daubeny.
Cultivation
It is suited for cultivation in small ponds, containers, and aquaria.Böswirth, D., Thinschmidt, A. (2019). "Miniwassergärten (Mein Garten): Gestalten Pflanzen Pflegen." p. 72. Deutschland: Franckh-Kosmos Verlags-GmbH & Company KG.Heß, T. (2021). "Kosmos Gartenjahr 2022: Der praktische Arbeitskalender mit Aussaattagen." p. 84. Deutschland: Franckh-Kosmos Verlags-GmbH & Company KG."Illustrirte Garten-Zeitung." p. 21. (1883). Deutschland: (n.p.).Nymphaea × daubenyana. (n.d.). Flowgrow. Retrieved December 28, 2023, from https://www.flowgrow.de/db/aquaticplants/nymphaea-daubenyana#:~:text=Nymphaea%20x%20daubenyana%20is%20a%20cultivated%20hybrid%20of,basis%2C%20which%20makes%20this%20Nymphaea%20easy%20to%20propagate. It is a fast growing and floriferous species. Despite being a tropical waterlily, it is relatively cold-tolerant.Nymphaea “Daubeniana” (Dauben, daubeniana). (n.d.). North Carolina Extension Gardener Plant Toolbox. Retrieved December 28, 2023, from https://plants.ces.ncsu.edu/plants/nymphaea-daubeniana/
References