I thought this little gem might be Common Cinquefoil, Potentilla simplex. I saw it during our walk on an interior path on Sears Island, ME. There is something incredibly pleasing about its perfect simplicity, don't you think?
After looking at many images online, I'm reconsidering whether or not this is cinquefoil. In my North Woods Wildflowers, Common Cinquefoil is the only flower looking remotely like this one. This plant's distinctive heart-shaped petals, I thought, should make identification easy. Now I'm wishing I had paid more attention to the foliage.
Can you identify this plant?