Nuphar advena subsp. advena
Family: Nymphaeaceae
Yellow Pond-Lily
[Nuphar advena var. tomentosa Torr. & A. Gray,  more...]
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From Flora of Indiana (1940) by Charles C. Deam

In shallow, running or stagnant water in lakes, streams, sloughs, and ponds throughout the state. Frequent to common in the lake area, and infrequent south of it.