Spatterdock, Cow lily
Nuphar advena
(Nuphar lutea subspecies advena)
Spatterdock is a large plant whose leaves are often floating, however
submersed and emersed leaves are common.
Spatterdock has large heart-shaped leaves, usually with wavy margins.
Spatterdock floating leaves are attached to long, stout stems which
arise from large, spongy rhizomes. Spatterdock submersed leaves are very
thin, attached at the bottom rhizomes. Spatterdock flowers are yellow
and "half-opened" at or above the water surface. Flowers are attached to
thick round stems that are often six feet long.
http://aquat1.ifas.ufl.edu/nulupic.html
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Click on images for a larger view.
Photos taken 7-2004
on Lake Norman
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