Source : Webster's Revised Unabridged Dictionary (1913)

Wallwort \Wall"wort`\, n. (Bot.)
   The dwarf elder, or danewort ({Sambucus Ebulus}).

Danewort \Dane"wort`\, n. (Bot.)
   A fetid European species of elder ({Sambucus Ebulus}); dwarf
   elder; wallwort; elderwort; -- called also {Daneweed},
   {Dane's weed}, and {Dane's-blood}.

   Note: [Said to grow on spots where battles were fought
         against the Danes.]

Source : WordNet®

Sambucus ebulus
     n : dwarf herbaceous elder of Europe having pink flowers and a
         nauseous odor [syn: {dwarf elder}, {danewort}]