I've been intent on re-wilding my shoreline for a few years - no mowing, letting it grow wild, and transplanting swamp loving natives into this area to create a natural looking buffer. It should slow down rainfall runoff and keep the shoreline protected from boat wake erosion.
This little beauty volunteered itself to the cause! Isn't it gorgeous? Delicate and subtle - marsh skullcap (Scutellaria galericulata).
As you can see from the leaves, it is a member of the mint family, a hardy native perennial.