In the center is a cypress tree surrounded by its "knees". The cypress likes to grow near or slightly in shallow water. But the roots need to breath and if the water rises for too long the tree will drown. So the cypress sends up "knees" from its root system like a diver uses a snorkel When I took shop in high school we made nice table lamps from cypress knees.
Retired American Airlines programmer, married to Susan, between us are 8 children and 14 grand children. Attended Wagoner High School, BS from Oklahoma State, MS from University of Tulsa, cradle Episcopalian, my hobbies are photography and tending roses.