Probably Vernonia gigantea. This is a monster plant system. 15 feet tall or so and large, sturdy canes. I'm dividing this plant and want it to find a home where you love butterflies.
Postage for plants
Kathy
have Vernonia ironweed
have one batch going out tomorrow but still a huge clump left
dmail me
Kathy
2 batches going out today but have a couple more. Joe Pye available too