hound's-tongue /ˈhaʊn(d)zˌtʌŋ/
  Hound's-tongue n.  Bot. A biennial weed (Cynoglossum officinale), with soft tongue-shaped leaves, and an offensive odor. It bears nutlets covered with barbed or hooked prickles. Called also dog's-tongue.
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  hound's-tongue
       n 1: perennial shrub of North America having coarse tongue-shaped
            leaves and pale-blue to purple flowers [syn: Cynoglossum
            virginaticum]
       2: biennial shrub of Europe and western Asia having coarse
          tongue-shaped leaves and dark reddish-purple flowers [syn:
           Cynoglossum officinale]