lnula helenium L Description: Elecampane root, Inula helenium L. [Fam. Asteraceae], is native to southern and eastern ... of egg-laying in the worms from the rabbits given Inula helenium was greatest. Many extracts did not induce physical changes ... in the worms, however, extracts of Inula helenium caused regressive and progressive changes such as degeneration, atrophy ...