Elecampane

Also called Horse-heal (Inula helenium) or Marchalan (in Welsh). 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".
It is a rather rigid herb, the stem of which attains a height of from 3 to 5 feet; the leaves are large and toothed, the lower ones stalked, the rest embracing the stem; the flowers are yellow, 2 inches broad, and have many rays, each three-notched at the extremity. The root is thick, branching and mucilaginous, and has a warm, bitter taste and a camphoraceous odor with sweet floral (similar to violet) undertones.

In France and Switzerland it is used in the manufacture of absinthe.
The root was employed by the ancients, both as a medicine and as a condiment, and in England it was formerly in great repute as an aromatic tonic and stimulant of the secretory organs. As a drug, however, the root is now seldom resorted to except in veterinary practice, though it is undoubtedly possessed of antiseptic properties.

John Gerard recommended elecampane for "the shortness of breath"; today herbalists prescribe it as an expectorant and for water retention; it also is claimed to have antiseptic properties. It has minor applications as a tonic and to bring on menstruation.