Source : Webster's Revised Unabridged Dictionary (1913)

Colicroot \Col"ic*root`\, n.
   A bitter American herb of the Bloodwort family, with the
   leaves all radical, and the small yellow or white flowers in
   a long spike ({Aletris farinosa} and {A. aurea}). Called
   sometimes star grass, blackroot, blazing star, and unicorn
   root.