Medeola virginiana, sometimes called Cucumber Root or Indian Cucumber-root, is in bloom in the woodlands around Cohasset right now. As the name implies, the small root is crunchy and white and tastes like cucumber — but you kill the plant when you dig it up for the root, so I stopped foraging for it many years ago.
The flower is tiny, maybe a centimeter or two across. It doesn’t look like much until you look at it through a magnifier: