The Collaborative International Dictionary of English v.0.48:

Orangeroot \Or"ange*root`\, n. (Bot.)
   An American ranunculaceous plant (Hidrastis Canadensis),
   having a yellow tuberous root; -- also called yellowroot,
   golden seal, etc.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Yellowroot \Yel"low*root`\, n. (Bot.)
   Any one of several plants with yellow roots. Specifically:
   (a) See Xanthorhiza.
   (b) Same as Orangeroot.
       [1913 Webster]