Senecio Jacobaea is commonly known as ragwort or tansy ragwort. This flowering plant belongs to the family of sunflowers and daisies. As an invasive species, it can be toxic to livestock. There are many synonyms that refer to this plant, including Stinking Willie, Tansy Ragweed, Tansy Stinking Nanny, Staggerwort, and Stinking Nanny. These synonyms reflect the plant's pungent odor and its negative impact on the environment. Recognizing these names can help gardeners and farmers to manage the plant and prevent its spread in areas where it is not wanted. With proper identification and control measures, ragwort can be kept under control in gardens, fields, and natural landscapes.