Ragwort / Spring / Summer / Autumn / Toxic Ragworts (Senecio species) are very common throughout the UK, the most common variety in the UK is Jacobaea vulgaris but they are all toxic. Common Names Ragwort, Common ragwort, Stinking Willy, Tansy ragwort, St. James-wort, Stinking nanny, Staggerwort, Cankerwort, Stammerwort. Botanical…