"Lily of the West" is a traditional British and Irish folk song, best known today as an American folk song, listed as number 957 in the Roud Folk Song Index. The American version is about a man who travels to Louisville and falls in love with a woman named Mary, Flora or Molly, the eponymous Lily of the West. He catches Mary being unfaithful to him, and, in a fit of rage, stabs the man she is with, and is subsequently imprisoned. In spite of this, he finds himself still in love with her. In the original version, the Lily testifies in his defense and he is freed, though they do not resume their relationship.