Which name describes a larger grouping of plants, Xanthorhiza or Melicytus?
Xanthorhiza: Xanthorhiza simplicissima (yellowroot) is the only member of the genus Xanthorhiza, and one of very few genera in the family Ranunculaceae with a woody stem (the other notable example being "Clematis"). Melicytus: Melicytus is a genus of flowering plants in the family Violaceae.
Melicytus