Herbal medicine.
D005060:Europe; D049668:History, 15th Century; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D008514:Medicine, Arabic; D009656:North America; D008517:Phytotherapy; D010946:Plants, Medicinal