is this a 8 foot tall oenothera?
This is growing in full sun next to my milkweed butterfly nursery. It has one stalk that branches about four feet from the ground. It looks like some pictures of oenothera that I have seen on the web but I have not found any species that are so tall. I have not measured it yet but it is at least eight feet tall on the conservative side.The leaves are alternate.Thank you for your help!