I went back out side and recounted the petals after posting the other picture. I counted 13 and when I was viewing the photo I counted 14. All of the blooms have 13 except for the one in the original photo. This photo should give a better up close view of the stalk and the leaves. Thanks for the reply on the other postings. Jim
Click the image for an enlarged view.
mark Antrim, Northern Ire United Kingdom (Zone 8b)
I think it might be a Silphium. they have reddish stems. it is possibly S. integrifolium aka Rosin Weed. behind the flowers there should have lots of sepals that look like bracts. sepals are the green scales that enclose a flower bud before it opens.