Yellow Pond Lily
Nuphar polysepala (N. lutea)

Family: Waterlily (Nymphaeaceae)
AKA: Rocky Mountain Pond Lily, Spatterdock, Cow Lily
Photo taken on: July 25, 2004
Location: Lily Lake, GV, CO
Life Zones: Montane to subalpine
Habitat: Water

Grows in shallow water with large heart-shaped leaves floating on the surface. Flowers are 3" across with thick sepals. It is the only native species of water lily in the Western US.

Flora of North America reference.