Purple toadflax (Linaria purpurea). Linaria purpurea is a species of flowering plant in the Foxglove family Scrophulariaceae) known by the common name purple toadflax. It is native to Italy This plant is poisonous to livestock, though ruminants may tend to avoid consuming it. The larvae of some species of butterflies. use this plant as a food source.Gran Sasso, Appennines, Abruzzo, Italy. July 2021