Blackroot \Black"root`\, n. (Bot.) See {Colicroot}. [1913 Webster]
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 {Aletris aurea}). Called sometimes {star grass}, {blackroot}, {blazing star}, and {unicorn root}. [1913 Webster]