Yes, Janet, it is the same plant. LOL! But I know what you mean - I had to go out and look at my plant to be sure!!! and the leaves look so different at the top, than at the bottom!
The leaves of V. baldwinii do seem too serated. It might be V. missourica? still not sure.
A pic of the leaves all from one plant -
BUT.... I went for a drive today and saw LOTS of ironweed growing in pastures along our county road. And many of the plants were over four feet tall, with big blooming tops. Wonder if its the same one? I also wonder if my ironweed isn't growing as tall and has less blooms since it is growing beneath the trees, instead of full sun?
I took a few of pics from the road.