yarb

“The medicine is nat'ral yarbs, pure yarbs; yarbs must cure me.”

“He was then generally known by the soubriquet of Yarb, or Yarb Man, as he preferred to be hailed, for the reason that he always carried with him a collection of yarrow, tansy, snake root, squaw root, choice buds and barks […]”

“Yarrow, or milleflower, was an exception; everybody still gathered that in large quantities to make 'yarb beer'.”