ABSTRACT
Names of plants often reveal much information about them. They can also be misleading. There is little difficulty with the scientific name of boneset, Eupatorium perfoliatum L. The genus name of this member of the daisy family (Asteraceae) derives from Mithridates Eupator, ancient king of Pontus, who first used a closely related plant for medicinal purposes. The species designation, perfoliatum, refers to the manner in which the erect hairy stem of the hardy perennial herb, which attains a height of about five feet and is crowned with heads of white tubular florets, appears to perforate the center of the pairs of oppositely joined leaves. Boneset, the common name, is more likely to lead one astray since the plant was classically employed in the treatment of fevers, not to mend broken bones. However, when it is recognized that the old name for dengue was breakbone fever, the derivation becomes clear.1
