Reviving this, since I have been able to identify this plant with some confidence...
First off, I have found this plant in my yard in the past. Living in Quebec, and decided to let it grow for once this year, since I am working on a butterfly garden project. I figured weeds was the way to go, along with some non-native nectar rich Buddleia bushes. Anyway, this plant is totally a Mullein lookalike, as I was, like the original poster, convinced for some time that I was growing
Verbascum Thapsus . Both are excessively similar. Long stalks, similar leaves, flowers both in form and color. Heights as well. But every posters here were correct, the seed pod is very different! By using the picture search on google, I found this...
Common Evening Primrose
If you scroll down to the illustration on your right, the seed pods are unmistakable. Gorgeous plant, I am totally going to harvest these next year, along with some
Lobelia Cardinalis