''Nuphar variegata'' (variegated pond-lily, bullhead pond-lily or yellow pond-lily) is rhizomatous, perennial, aquatic herb in the water lily family

Nymphaeaceae Nymphaeaceae () is a family of flowering plants, commonly called water lilies. They live as rhizomatous aquatic herbs in temperate climate, temperate and tropical climates around the world. The family contains five genera with about 70 know ...

native to much of

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

and the northernmost of the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

.''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 herb''Nuphar 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 George Engelmann, also known as Georg Engelmann, (2 February 1809 – 4 February 1884) was a German-American botanist. He was instrumental in describing the flora (plants), flora of the west of North America, then very poorly known to Europeans; ...

.''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 ate Accessed: 04 February 2025

Conservation

The

NatureServe conservation status The NatureServe conservation status system, maintained and presented by NatureServe in cooperation with the Natural Heritage Network, was developed in the United States in the 1980s by The Nature Conservancy (TNC) as a means for ranking or categor ...

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

References

variegata Flora of Northern America Aquatic plants Plants described in 1866 Flora of the United States Flora of Canada {{angiosperm-stub