1) Cow lily 2) Nuphar advena 3) Water lily 4) Yellow pond lily 1) Cow lily 
(Nuphar) These hardy, aquatic perennials are natives of Japan, Europe and North America. These floating plants have several popular names; they are called Spatterdock, Brandy Bottle, Yellow Pond Lily and Yellow Cow Lily. Spatterdocks produce large leaves growing 141/2' by10'. With a spread of up to 8 feet, these plants are mainly used in large wate...
[n] - common water lily of eastern and central North America, having broad leaves and globe-shaped yellow flowers
cow lily noun common water lily of eastern and central North America, having broad leaves and globe-shaped yellow flowers; in sluggish fresh or slightly brackish water