Botanical name: 

Eupatorium perfoliatum, boneset, or thoroughwort, is indigenous to the temperate regions of the Eastern United States, and in the form of an infusion or tea was very popular with the settlers; being found in every well-regulated household. As a bitter tonic its uses became known to the early members of the American medical profession, and was handed therefrom to physicians of the present day. Its American history is probably paralleled by the record of this herb in other countries.

The History of the Vegetable Drugs of the U.S.P., 1911, was written by John Uri Lloyd.