noun (n)

• perennial or biennial herb cultivated for its delicate usually blue flowers(noun.plant)

  Synonym:
  alkanet, anchusa officinalis
  

  source: wordnet30
• widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States(noun.plant)

  Synonym:
  bitterweed, bristly oxtongue, oxtongue, picris echioides
  

  source: wordnet30
• A plant of the genus Anchusa, and especially the A. officinalis, sometimes called alkanet; oxtongue.(noun)

  source: webster1913