"Goldthread" redirects here. For a fine wire of gold, see gold thread
Coptis (Goldthread or Canker Root) is a genus of between 10–15 species of flowering plants in the family Ranunculaceae, native to Asia and North America.
- Selected species
Coptis teeta is used as a medicinal herb in China and the Himalayan regions of India where it is used as a bitter tonic for dyspepsia. It is also believed to help insomnia in Chinese herbology. The roots contain the bitter alkaloid berberine. The dried roots (goldthread) were commercially marketed in Canada until the 1950s or early 60s, to be steeped into a "tea" and swabbed onto areas affected by thrush (candidiasis) infection.
- ^ Huang, J.; Long, C. (2007). "Coptis teeta-based agroforestry system and its conservation potential: A case study from northwest Yunnan". AMBIO 36 (4): 343–49. doi:10.1579/0044-7447(2007)36[343:CTASAI]2.0.CO;2.