Nuphar ulvacea is a species of rhizomatous aquatic plant native to the US-American states Alabama and Florida.
Description Vegetative characteristics Nuphar ulvacea is an aquatic plant with stout, 2-5 cm wide rhizomes with 11-13 mm long, and 8-9 mm wide leaf scars. The petiolate, lanceolate, glabrous floating leaves with a blunt apex are 115-165 mm long, and 54-66 mm wide. The glabrous, terete, smooth petiole is 45-70 cm long, and 7 mm wide. The very thin submerged leaves are 23-28 cm long, and 7-10 wide.Miller, G. S., & Standley, P. C. (1912). The North American species of Nymphaea. Contributions From the United States National Herbarium, 16, 63–108. http://www.biodiversitylibrary.org/openurl?ctx_ver=Z39.88-2004&rft_id=http://www.biodiversitylibrary.org/page/371937&rft_val_fmt=info:ofi/fmt:kev:mtx:book&url_ver=z39.88-2004 Generative characteristics The flowers, supported by long peduncles, extend above the water surface.Nuphar ulvacea - Species Page - APA: Alabama Plant Atlas. (n.d.). Retrieved January 18, 2024, from http://floraofalabama.org/Plant.aspx?id=2704 They are 15-18 mm long, and 20-23 mm wide. They have six sepals. The subglobose, prominently ribbed fruit bears 3.5-4 mm long, and 2.5 mm wide seeds.
Reproduction Generative reproduction Flowering occurs from Spring to early Autumn.Nuphar ulvacea in Flora of North America @ efloras.org. (n.d.). Retrieved January 18, 2024, from http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233500820 Taxonomy Publication It was first described as Nymphaea ulvacea G.S.Mill. & Standl. by Gerrit Smith Miller Jr. and Paul Carpenter Standley in 1912. Later, it was included in the genus Nuphar Sm. as Nuphar ulvacea (G.S.Mill. & Standl.) Standl. published by Paul Carpenter Standley in 1931.
Type specimen The type specimen was collected by A. H. Curtiss in a blackwater River near Milton, Florida, USA on the 14th of May 1898.
Etymology The specific epithet ulvacea references the genus of algae Ulva, as the submerged leaves of Nuphar ulvacea resemble it.
Conservation The NatureServe conservation status is T2 Imperiled and its habitat is imperiled.Nuphar ulvacea Aquatic Vegetation. (n.d.). NatureServe. Retrieved January 18, 2024, from https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.683775/Nuphar_ulvacea_Aquatic_Vegetation
Ecology Habitat It occurs in blackwater habitats, streams fed by springs, and old, water-filled sand and gravel pits.
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