"Elecampane ,
Inula helenium, also called horse-heal or elfdock, is a widespread plant species in the sunflower family Asteraceae.
It is native to Eurasia from Spain to Xinjiang Province in western China, and naturalized in parts of North America.

,,, The plant's specific name, helenium, derives from Helen of Troy; elecampane is said to have sprung up from where her tears fell.
It was sacred to the ancient Celts, and once had the name "elfwort".
The plant traditionally was held to be associated with the elves and fairy folk.

Nicholas Culpeper considered elecampane to be ruled by Mercury and used it to warm a cold and windy stomach, to resist poison, to strengthen sight, and to clear internal blockages.


more : https://en.m.wikipedia.org/wiki/Elecampane#Folklore_and_Traditional_Uses