The common names for the plants are all based on the previous usage of one species, Eupatorium perfoliatum, as an herbal medicine. Boneset alludes to the use of the plant to treat broken bones, instead the common name apparently derives from the herb's use to treat dengue fever Dengue fever Etymology, which was also called breakbone fever because of the pain that it caused. The name thoroughwort also comes from Eupatorium perfoliatum, and refers to the perfoliate leaves, in which the stem appears to pierce the leaf (i.e. go through, note that in older usage "thorough" was not distinguished from "through", compare for example the word thoroughfare).
Boneset, although poisonous to humans and grazing livestock, has been used in folk medicine, for instance to excrete excess uric acid which causes gout. Caution is advised when using boneset, since it contains toxic compounds that can cause liver damage. Side effects include muscular tremors, weakness, and constipation; overdoses may be deadly.
Boneset in my yard. Canon Rebel XSI, Lensbaby Muse with wide angle lens + 4x macro.
Sepia tone edited with pink texture.
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