common ragwort

Jacobaea vulgaris is a wildflower that has spread beyond its native range and is now commonly found as a weed in various regions. It is part of the Asteraceae family and has been reported in numerous locations, including parts of Canada, the United States, Europe, and Japan. The species was originally described under the genus Senecio but is now classified under Jacobaea. A lectotype was designated for the species based on the Hortus Cliffortianus polynomial, though descriptions cannot serve as types under the International Code of Nomenclature for algae, fungi, and plants.