flix weed

from The Collaborative International Dictionary of English v.0.48

Flix \Flix\, n.
   The flux; dysentery. [Obs.] --Udall.
   [1913 Webster]

   {Flix weed} (Bot.), the {Sisymbrium Sophia}, a kind of hedge
      mustard, formerly used as a remedy for dysentery.
      [1913 Webster]