The Collaborative International Dictionary of English v.0.48:

Nuphar \Nu"phar\ (n[=u]"f[aum]r), prop. n. [Per. n[=u]far.]
   (Bot.)
   A genus of plants found in the fresh-water ponds or lakes of
   Europe, Asia, and North America; the yellow water lily. Cf.
   Nymphaea.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Nuphar
    n 1: spatterdocks [syn: Nuphar, genus Nuphar]