| Gentiana | 
|  | 
| Gentiana verna | 
|
| Scientific classification | 
| Kingdom: | Plantae | 
 
| Clade: | Tracheophytes | 
 
| Clade: | Angiosperms | 
 
| Clade: | Eudicots | 
 
| Clade: | Asterids | 
 
| Order: | Gentianales | 
 
| Family: | Gentianaceae | 
 
| Tribe: | Gentianeae | 
 
| Subtribe: | Gentianinae | 
 
| Genus: | Gentiana L.
 | 
|
|
| Type species | 
| Gentiana lutea L. 
 | 
| Species | 
| See text | 
| Synonyms | 
| 
Aloitis Raf.
Anthopogon Neck.
Asterias Borkh.
Bilamista Raf.
Calathiana Delarbre
Chaelothilus Neck.
Chiophila Raf.
Chondrophylla A.Nelson
Ciminalis Adans.
Coilantha Borkh.
Cruciata Gilib.
Cuttera Raf.
Dasistepha Raf.
Dasystephana Adans.
Dicardiotis Raf.
Diploma Raf.
Endotriche Steud.
Ericala Reneaulme ex Gray
Ericoila Reneaulme ex Borkh.
Favargera Á.Löve & D.Löve
Gaertneria Neck.
Gentianodes Á.Löve & D.Löve
Gentianusa Pohl
Hippion F.W.Schmidt
Holubia Á.Löve & D.Löve
Holubogentia Á.Löve & D.Löve
Kudoa Masam.
Kuepferella M.Laínz
Kurramiana Omer & Qaiser
Lexipyretum Dulac
Pneumonanthe Gled.
Psalina Raf.
Qaisera Omer
Rassia Neck.
Ricoila Reneaulme ex Raf.
Sebeokia Neck.
Selatium D.Don ex G.Don
Spiragyne Neck.
Thylacitis Reneaulme ex Adans.
Thyrophora Neck.
Tretorhiza Adans.
Tretorrhiza Reneaulme ex Delarbre
Varasia Phil.
Xolemia Raf.
  
 | 
Gentiana () is a genus of flowering plants belonging to the gentian family (Gentianaceae), the tribe Gentianeae, and the monophyletic subtribe Gentianinae. With over 300 species, it is considered a large genus. Gentians are notable for their mostly large trumpet-shaped flowers, which are often of an intense blue hue.
The genus name is a tribute to Gentius, an Illyrian king who may have discovered tonic properties in gentians.