Butterbur coltsfoot

from The Collaborative International Dictionary of English v.0.48

Coltsfoot \Colts"foot`\, n. (Bot.)
   A perennial herb ({Tussilago Farfara}), whose leaves and
   rootstock are sometimes employed in medicine.
   [1913 Webster]

   {Butterbur coltsfoot} (Bot.), a European plant ({Petasites
      vulgaris}).
      [1913 Webster]