Bartlettina is a genus of flowering plants in the aster family, Asteraceae. They are native to tropical regions of Mesoamerica and South America. The genus was erected to house several plants separated from genus Eupatorium. These are shrubs or perennial herbs with woody bases. The oppositely arranged leaves have smooth or serrated edges. The flower heads contain tubular florets. The best known species may be the blue mist flower (B. sordida), which is cultivated as an ornamental plant and has become naturalized outside its native range.