Coptis (Gold Thread or Goldenthread) is a genus of between 10–15 species of flowering plants in the family Ranunculaceae, native to Asia and North America. Selected species Coptis aspleniifolia Coptis chinensis Coptis deltoidea Coptis groenlandica Coptis japonica Coptis laciniata Coptis occidentalis Coptis omeiensis Coptis quinquefolia Coptis quinquesecta Coptis teeta Coptis trifolia