Gentian is a genus of flowering plants belonging to the Gentianaceae family, which contains about 400 species. Gentian is most notably recognized by its trumpet-like, star-shaped flowers with an intense blue hue. Its extremely bitter root is a common beverage flavoring for bitters and aperitifs, as well as popular liqueurs like Aperol. Gentian Root has been used in European herbal medicine since its discovery 2,200 years ago.