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Products > Nuphar polysepalum (Aquatic)
Nuphar polysepalum (Aquatic) - Spatter-dock

Note: This plant is not currently for sale. This is an archive page preserved for informational use.  

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Habit and Cultural Information
Category: Aquatic Plant
Family: Nymphaeaceae (Waterlilies)
Origin: North America
Flower Color: Yellow
Bloomtime: Summer
Synonyms: [Nuphar lutea ssp. polysepala]
Height: Prostrate
Width: 3-5 feet
Exposure: Full Sun
Irrigation (H2O Info): Aquatic
Nuphar polysepalum (Aquatic) (Spatter-dock) - A native Western US aquatic perennial with stout, creeping rhizomes from which the leaves, on long petioles arise. In early spring the foliage of this plant is submerged and somewhat translucent, looking like lettuce at the pond bottom. In late spring the up to 1 foot wide rounded leaves are at the water surface, with some floating flat with others erect. From May to August emerge the round 10 inch wide flowers, composed of 6 yellow sepals, sometimes reddish tinged that cup around the center of the flower and hide numerous inconspicuous yellow petals and the red stamens that surround the large developing fruit. Although it can grow in water up to 12 feet deep Nuphar is more often found in shallow water (3-9 feet deep) in ponds, lakes, swamps, slow moving rivers, canals and ditches where it spreads by rhizomes and can form almost pure stands and may exclude other plant species. Seeds and rhizomes were eaten by North American Indians and are a food source for mammals and waterfowl. The foliage provides spawning habitat for fish. Plants also are cultivated for the fruits which are sometimes used in dried plant decorations. Also known as Yellow Pond Lily or Cow Lily. The genus name was derived from the Arabic word for water lilies, nailufar, which was converted in the Middle Ages to nenuphar, then to nuphar. We grew this plant form 2005 to 2008.  The information on this page is based on research conducted in our nursery library and from online sources as well as from observations made of this plant as it grows in our nursery, in the nursery's garden and in other gardens that we have observed it in. We also will incorporate comments received from others and always appreciate getting feedback of any kind from those who have additional information, particularly if this information is contrary to what we have written or includes additional cultural tips that might aid others in growing Nuphar polysepalum.