Tall plant with multiple Purple many petaled flowers.
Seen mixed in with some cattails and in the better drained part of the wetlands.
Asteraceae | tall ironweed
Vernonia gigantea (also known as Giant ironweed, Tall Ironweed or Ironweed) is a species of perennial plant from Asteraceae family that can be found in United States and Canada. The plant is native to the eastern United States, north to New York state and Ontario, and southwest to Texas.