Xanthorhiza
Pronunciation : Xan`tho*rhi"za, n. [NL.
Part of Speech : fr.
Definition : Defn: A genus of shrubby ranunculaceous plants of North America, including only the species Xanthorhiza apiifolia, which has roots of a deep yellow color; yellowroot. The bark is intensely bitter, and is sometimes used as a tonic.
Gr. xanqo`s yellow + "ri`za root.] (Bot.)
Source : Webster's Unabridged Dictionary, 1913