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Nuphar ulvacea
Species of perennial aquatic plant From Wikipedia, the free encyclopedia
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Nuphar ulvacea is a species of rhizomatous aquatic plant native to the US-American states Alabama and Florida.[2]
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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.[3]
Generative characteristics
The flowers, supported by long peduncles, extend above the water surface.[4] 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.[3]
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Reproduction
Generative reproduction
Flowering occurs from Spring to early Autumn.[5]
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.[2]
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.[3]
Etymology
The specific epithet ulvacea references the genus of algae Ulva, as the submerged leaves of Nuphar ulvacea resemble it.[3]
Conservation
The NatureServe conservation status is T2 Imperiled[1] and its habitat is imperiled.[6]
Ecology
Habitat
It occurs in blackwater habitats, streams fed by springs,[5][6][3] and old, water-filled sand and gravel pits.[4]
References
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