A species of Echium, native to western and southern Europe (from southern England south to Iberia and east to the Crimea), northern Africa, and southwestern Asia (east to Georgia). It has also been introduced to Australia and South Africa and is an invasive plant. Due to a high concentration of pyrrolizidine alkaloids in the shoot it is poisonous to grazing livestock, especially those with a simple digestive system like horses. The toxins are cumulative in the liver and death results from too much Paterson's curse in the diet. It is a winter annual plant growing to 20–60 cm tall, with rough, hairy, lanceolate leaves up to 14 cm long. The flowers are purple, 15–20 mm long, with all the stamens protruding, and borne on a branched spike.