Helenio . ( Of the lat. )( helenion, and this of the g ?). 1. m. plant perennial of the family, with hairy stems from eight to twelve decimetres of height, radical leaves very large, petiolate, oblong and perfoliadas, juicy, unevenly toothed and very hairy below the upper, yellow flowers in heads terminals, Corolla long on the one hand by way of tongue, almost cylindrical capsular fruit, and bitter and aromatic rootused in medicine as one of the ingredients that make up the triaca.