Rosinweed, Silphium integrifolium

As summer progresses I find it increasingly difficult to identify the confusing mix of sunflowers. Books such as “Ozark Wildflowers” by Don Kurz really help.

The flower here is called Rosinweed. The butterfly is another Easter Tiger Swallowtail. They are the most abundant butterfly at the moment. I photographed this butterfly late yesterday with the sun shining from behind.