I found this plant growing in one of my beds. I really think I may have planted it years ago, but for some reason it decided to come up and confuse me this year. I vaguely remember gathering seeds from this plant about 15 years ago. A gardener friend of mine says she would pull it up if it were in her garden...well, it is a good thing I am not her, cause I like it even if it is considered a weed.
It is tall with small sunflower like flower heads.
you can see the seeds on the stem in the lower part of this photo.