Ageratina havanensis, the Havana snakeroot or white mistflower, is a species of flowering shrub in the sunflower family, native to Texas, Cuba, and northeastern and east-central Mexico (Veracruz, Tamaulipas, Coahuila, Nuevo León, Hidalgo, San Luis Potosí, Puebla, Guanajuato, Querétaro). Unlike many other species of Ageratina, it is evergreen.