Inula Helenium Worst Irritant No known benefits Inula Helenium description _Inula helenium_ is the Latin name for elecampane; it is a plant that can be very sensitising to skin. In cosmetics, this ingredient is most often added for its fragrance. This plant can cause reactions for those allergic to plants in the ragweed family. Related ingredients: Elecampane Inula Helenium Extract Horse Elder