danewort

 
Pronunciation: /ˈdeɪnwəːt/

noun

  • a dwarf Eurasian elder with a strong, unpleasant smell and berries yielding a blue dye.
    • Sambucus ebulus, family Caprifoliaceae

Origin:

early 16th century: so named from the folklore that the plant sprang up where Danish blood was spilt in battle