The Gentiana is a genus of flowering plants belonging to the family Gentianaceae. With about 400 species it is considered a large genus. It is mainly located in the mountains of the temperate zones of the northern hemisphere, but also in the Andes. Some species are used for brandy production and for the production of medicines. Few species and varieties are used as ornamental plants.
They are notable for their mostly large, trumpet-shaped blue flowers.
The genus name is a tribute to Gentius, an Illyrian king who may have been the discoverer of tonic properties in gentians.