GNU Collaborative International Dictionary of English

Found one definition

  1.       
    
    Danewort , n. (Bot.) A fetid European species of elder (Sambucus Ebulus); dwarf elder; wallwort; elderwort; -- called also Daneweed, Dane's weed, and Dane's-blood. [Said to grow on spots where battles were fought against the Danes.]
    1913 Webster