A trip to a lake today, a man-made lake but it's been there for decades. It's a managed property, there is a bit of woods, reeds at water's edge, but also mown grass not far from the shore. A few wildflowers there, so here is the second I'd like to identify:
This was down right close to the water, in the reeds there. The flower is maybe the size of a nickel in diameter measured (guessed) from outer petal tips.