Our cup plants near the woods behind the house were in bright morning sunlight today. Weeks ago, this particular plant was standing tall with flower buds showing. A deer passed by soon after and ate the tops. Today, the plant rewarded us with this view after having grown back for another try.
Two features of silphium perfoliatum stand out in addition to the cheerful yellow flowers. The main stem is square, not round. And, they have leaves arranged to cup and gather water. Read more about these plants here.