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.
Description
Nuphar advena growing in shallow water
Nuphar advena is a perennial, aquatic herb with spongy rhizomes that are 5–10 centimetres (2–4in) wide. The leaves are mostly emergent, but can also be floating, or submersed. The submerged leaves are 12–40cm (4+1⁄2–15+1⁄2in) long and 7–30cm (3–12in) wide.
The flowers are protogynous, fragrant, nectariferous, solitary, yellow-green, and up to 4cm wide. They float on the water surface or extend beyond it. The flowers have six sepals while the gynoecium consists of 9–23 carpels. The fruit is fleshy, ovoid to broadly obovate, ribbed, green, and 2–5 cm long and wide. It contains 186–353 seeds, which are 3–6 mm long.
It was first published as Nymphaea advenaAiton by William Aiton in 1789. It was placed into the genus NupharSm. as Nuphar advena(Aiton) W.T.Aiton published by William Townsend Aiton in 1811. It is placed in the section Nuphar sect. Astylus.
Natural hybridisation
In the United Kingdom, it has hybridised with Nuphar lutea, resulting in the hybrid Nuphar × porphyranthera.
Etymology
The specific epithet advena means immigrant, outsider, foreigner, or stranger.
Distribution and habitat
It is native to Canada (such as Nova Scotia), the United States, Mexico, and Cuba. It has been introduced to the United Kingdom.
It occurs in ponds, lakes, streams, rivers, marshes, and swamps.
The plant is used as food. The dried seeds can be eaten or ground to flour. Native Americans cooked the rootstocks and removed the rind to prepare the sweetish, glutinous contents in various ways.
12University 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
↑Nymphaea advena Aiton. (n.d.). International Plant Names Index. Retrieved February 1, 2025, from https://www.ipni.org/n/281429-2
↑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