Here's a more typical boneset. This image was about three weeks earlier than the one on the wildflower page. This plant gets its name from the traditional hope that it will help broken bones knit. There was a belief that God had put signs, called signatures, on plants to show us what they were good for. This one has leaves that unite around the stem, hence it was inferred that they helped heal. I don't know why bones were the particular focus. American Indians used this plant for an amazingly wide range of maladies, from colds to poisoning their enemies.