Baccharis halimifolia

Along the marsh edges of the southeastern coast, the groundsel bush has long lived a double life, in the landscape and in medicine. Native peoples of the coastal South recognized the shrub for fevers, respiratory illness, and inflammatory complaints, especially those linked to damp and cold, and early European settlers learned these uses from Indigenous teachers and folded them into regional folk medicine. In south Louisiana the plant became best known by the French-Creole name manglier, and a strong, bitter manglier tea earned a reputation as a serious remedy: Cajun and Creole healers decocted the leaves and young twigs for colds, influenza, pneumonia, stubborn coughs, and the wasting lung disease once called consumption, the bitterness taken as a sign of potency. Manglier was also called on for what folk practice named bad blood and the sugar (diabetes), and for inflamed kidneys, used as an occasional systemic cleanser rather than a daily tonic. In the twenty-first century, laboratory work at LSU's Pennington Biomedical Research Center and elsewhere found that extracts show anti-inflammatory activity and effects on insulin sensitivity in cell and animal models, lining up strikingly with the old uses, though the research is early and not human clinical trials. This account is cultural and historical background only, not medical advice, and is not a recommendation for self-treatment.