I used to own a camp with a swimming pond in the Northeast Kingdom. I remember in late summer swimming in the pond and admiring these plants growing along the pond edge. They were 2- to 3-feet tall with rounded stems, deep green, boldly veined leaves and white or pink flowers on the top of the stems. The flowers reminded me of an animal's head. Do you know the animal I'm talking about? Yes, it was chelone or turtle head.