Nymphozanthus advena var. macrophyllus (Small) Fernald
Nymphozanthus fluviatilis (R.M.Harper) Fernald
Nuphar advena (spatterdock or cow lily or yellow pond-lily) is a species of Nuphar native throughout the eastern United States and in some parts of Canada, as well as Mexico and Cuba. It is locally naturalized in Britain.
Nuphar advena is a perennial, aquatic herb[3] with spongy rhizomes[4] that are 5–10 centimetres (2–4in) wide.[5] The leaves are mostly emergent,[6][7][8] but can also be floating, or submersed.[7] The submerged leaves are 12–40cm (4+1⁄2–15+1⁄2in) long and 7–30cm (3–12in) wide.[9]
The flowers are protogynous, fragrant, nectariferous,[10] solitary,[7][4] yellow-green,[7] and up to 4cm wide.[5] They float on the water surface or extend beyond it.[7] The flowers have six sepals[8][5] while the gynoecium consists of 9–23 carpels.[5] The fruit is fleshy,[9] ovoid to broadly obovate,[8] ribbed, green, and 2–5 cm long and wide.[5] It contains 186–353 seeds,[10] which are 3–6 mm long.[5]
The plant is used as food.[23][24][9] The dried seeds can be eaten or ground to flour.[23][24][22] Native Americans cooked the rootstocks and removed the rind to prepare the sweetish, glutinous contents in various ways.[22]
1 2 University of Michigan Herbarium. (n.d.-a). Nuphar advena (Aiton) W. T. Aiton. Michigan Flora. Retrieved February 1, 2025, from https://michiganflora.net/record/1725
↑ Aiton, William, Bauer, Franz Andreas, Sowerby, James, Ehret, Georg Dionysius, & Nicol, George. (1789). Hortus Kewensis, or, A catalogue of the plants cultivated in the Royal Botanic Garden at Kew (Vol. 2, Issue 13, p. 226). Printed for George Nicol, Bookseller to his Majesty. https://www.biodiversitylibrary.org/page/4864646
↑ Aiton, William, Aiton, William Townsend, & King’s College London. (1810). Hortus kewensis, or, A catalogue of the plants cultivated in the Royal Botanic Garden at Kew (Vol. 3, p. 295). Longman, Hurst, Rees, Orme, and Brown. https://www.biodiversitylibrary.org/page/47853133
↑ Nuphar advena (Aiton) W.T.Aiton. (n.d.-b). International Plant Names Index. Retrieved February 1, 2025, from https://www.ipni.org/n/30043701-2
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