Nuphar variegata (variegated pond-lily, bullhead pond-lily or yellow pond-lilyDickinson, T.; Metsger, D.; Bull, J.; & Dickinson, R. (2004) ROM Field Guide to Wildflowers of Ontario, Royal Ontario Museum, Toronto:McClelland and Stewart Ltd., p 53.) is rhizomatous, perennial, aquatic herb in the water lily family Nymphaeaceae native to much of Canada and the northernmost of the United States.Nuphar variegata in Flora of North America @ efloras.org. (n.d.). Retrieved February 3, 2025, from http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233500821
Description
Vegetative characteristics Nuphar variegata is a rhizomatous, perennial, aquaticWisconsin State Herbarium, UW-Madison. (n.d.-c). Nuphar variegata Durand. Online Virtual Flora of Wisconsin. Retrieved February 3, 2025, from https://wisflora.herbarium.wisc.edu/taxa/index.php?taxon=4340 herbNuphar variegata Engelmann ex Durand. (n.d.). Database of Vascular Plants of Canada (VASCAN). Retrieved February 3, 2025, from https://data.canadensys.net/vascan/taxon/6715 with 2.5–7 cm wide rhizomes. The leaves are submerged or floating, but most are floating leaves. The submerged leaves are 7–35 cm long, and 5–25 cm wide.Native Plant Trust. (n.d.-c). Nuphar variegata — bullhead pond-lily, yellow pond-lily. Go Botany. Retrieved February 3, 2025, from https://gobotany.nativeplanttrust.org/species/nuphar/variegata/ The petiole is flattened.Haines, A. (2011). New England Wild Flower Society's Flora Novae Angliae: A Manual for the Identification of Native and Naturalized Higher Vascular Plants of New England. p. 85. Vereinigtes Königreich: Yale University Press. Generative characteristics The 2.5–5 cm wide, yellow flowers float on the water surface or extend beyond it.Nuphar variegata Engelm. ex Durand – Yellow Pond Lily. (n.d.). Greater Ottawa Water Garden Horticultural Society (GOWGHS). Retrieved February 3, 2025, from https://www.ottawawatergardens.com/nuphar-variegata The flowers have 6 yellow sepals which enclose the small petals. The gynoecium consists of 7–28 carpels. The green to yellow,Elliman, T. (2016). Wildflowers of New England. USA: Timber Press. or rarely red stigmatic disk with 7–28 stigmatic rays is 8–20 mm wide. The fleshy, strongly ribbed,Nuphar variegata (Yellow Pond-lily). (n.d.). Minnesota Wildflowers. Retrieved February 3, 2025, from https://www.minnesotawildflowers.info/flower/yellow-pond-lily ovoid, 2–4.3 cm long, and 2–3.5 cm wide fruit bears 2.5-5 mm long seeds.
Cytology The chromosome count is 2n = 34.
Taxonomy It was first validly published by Elias Durand in 1866 based on previous work by George Engelmann.Nuphar variegata Engelm. ex Durand. (n.d.). Plants of the World Online. Retrieved February 3, 2025, from https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:1117161-2 It is placed in the section Nuphar sect. Astylus. Natural hybridisation Together with Nuphar microphylla, it forms the natural hybrid Nuphar × rubrodisca.Nuphar × rubrodisca Morong. (n.d.). Plants of the World Online. Retrieved February 3, 2025, from https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:171095-2 Etymology The specific epithet variegata, from the Latin variegatus, means variously coloured.R.S. Cowan, D.J. Du Puy, I.R.H. Telford, P.G. Kodela. Erythrina variegata, in P.G. Kodela (ed.), Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. https://profiles.ala.org.au/opus/foa/profile/Erythrina%20variegata [Date Accessed: 04 February 2025]
Conservation The NatureServe conservation status is T5 Secure.
Ecology Habitat It occurs in ponds, lakes, streams, and riversUniversity of Michigan. (n.d.). Nuphar variegata Durand. Michigan Flora. Retrieved February 3, 2025, from https://michiganflora.net/record/1728 in up to 2 m deep water.Nuphar variegata bullhead pondlily. (n.d.). PAEnflowered. Retrieved February 3, 2025, from https://www.paenflowered.org/apgii/nymphaeales/nymphaeaceae/nuphar/nuphar-variegata
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