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Boneset (Eupatorium perfoliatum) is a North American perennial of wet meadows and stream edges. Its paired leaves appear to be pierced by the stem, explaining the species name perfoliatum.
Identification
Boneset has rough opposite leaves joined around the stem and broad clusters of small white flowers. Correct identification matters because several related species share similar habitats.
Traditional Use
North American herbal traditions used the aerial parts in intensely bitter infusions associated with fever, influenza-like illnesses, aches, and respiratory discomfort. The common name reflects its historical reputation for the deep body aches once described as “break-bone” fever rather than literal bone healing.
Research Context
Laboratory studies have examined immune, anti-inflammatory, and antimicrobial activity, but modern clinical evidence is limited.
Safety
Boneset is not a casual daily tea. Large amounts can cause nausea, vomiting, and diarrhea. Some Eupatorium-group plants contain or may contain pyrrolizidine alkaloids, raising concern about liver toxicity and making prolonged or concentrated internal use inappropriate without knowledgeable guidance. Pregnancy and breastfeeding use should be avoided unless specifically cleared by a qualified clinician.
Folklore
Boneset became one of the emblematic herbs of nineteenth-century American domestic medicine and was strongly associated with epidemic fever seasons.
Educational information only.