资料来源 : Webster's Revised Unabridged Dictionary (1913)

Water crowfoot \Wa"ter crow"foot`\ (Bot.)
   An aquatic kind of buttercup ({Ranunculus aquatilis}), used
   as food for cattle in parts of England.

   {Great water crowfoot}, an American water plant ({Ranunculus
      multifidus}), having deep yellow flowers.