• Gentiana Linnaeus, 1753
• Gentiana acuta Michx. accepted as Gentianella amarella (L.) Boerner
• Gentiana affinis Griseb.
• Gentiana alba Muhl. ex Nutt.
• Gentiana aleutica Cham. & Schlecht. accepted as Gentianella propinqua (Richards.) J. Gillett
• Gentiana algida Pallas
• Gentiana amarella auct.p.p. non L. accepted as Gentianella amarella (L.) Boerner
• Gentiana andrewsii Griseb.
• Gentiana aphylla Jacq. accepted as Voyria aphylla (Jacq.) Pers.
• Gentiana aquatica auct. non L. accepted as Gentiana fremontii Torr.
• Gentiana arctophila Griseb. accepted as Gentianella propinqua (Richards.) J. Gillett
• Gentiana austromontana Pringle & Sharp
• Gentiana autumnalis Linnaeus
• Gentiana barbata Froel. accepted as Gentianopsis detonsa (Rottb.) Ma
• Gentiana barbellata Engelm. accepted as Gentianopsis barbellata (Engelm.) Iltis
• Gentiana bigelovii Gray accepted as Gentiana affinis Griseb.
• Gentiana billingtonii Farw.
• Gentiana bisetaea T.J. Howell accepted as Gentiana setigera Gray
• Gentiana calycosa Griseb.
• Gentiana catesbaei Walt.
• Gentiana cherokeensis (W.P. Lemmon) Fern. accepted as Gentiana saponaria Linnaeus
• Gentiana clausa Raf.
• Gentiana crinita Froel. accepted as Gentianopsis crinita (Froel.) Ma
• Gentiana cruciata Linnaeus
• Gentiana curtisii J. Pringle
• Gentiana decora Pollard
• Gentiana deloachii (W.P. Lemmon) Shinners accepted as Gentiana villosa Linnaeus
• Gentiana detonsa Rottb. accepted as Gentianopsis detonsa (Rottb.) Ma
• Gentiana douglasiana Bong.
• Gentiana elegans A. Nels. accepted as Gentianopsis thermalis (Kuntze) Iltis
• Gentiana elliottii Chapman accepted as Gentiana catesbaei Walt.
• Gentiana flavida Gray accepted as Gentiana alba Muhl. ex Nutt.
• Gentiana forwoodii Gray accepted as Gentiana affinis Griseb.
• Gentiana fremontii Torr.
• Gentiana gaspensis Victorin accepted as Gentianopsis macounii (Holm) Iltis
• Gentiana glauca Pallas
• Gentiana grandilacustris J. Pringle
• Gentiana grandis (Gray) Holm accepted as Gentianopsis macrantha (D. Don ex G. Don) Iltis
• Gentiana heterosepala Engelm. accepted as Gentianella amarella (L.) Boerner
• Gentiana holopetala (Gray) Holm accepted as Gentianopsis holopetala (Gray) Iltis
• Gentiana interrupta Greene accepted as Gentiana affinis Griseb.
• Gentiana linearis Froel.
• Gentiana lutea Linnaeus
• Gentiana macounii Holm accepted as Gentianopsis macounii (Holm) Iltis
• Gentiana menziesii Griseb. accepted as Gentiana sceptrum Griseb.
• Gentiana microcalyx J.G. Lemmon accepted as Gentianella microcalyx (J.G. Lemmon) J. Gillett
• Gentiana newberryi Gray
• Gentiana nigricans Lam. accepted as Hedyotis nigricans (Lam.) Fosberg
• Gentiana nivalis Linnaeus
• Gentiana nutans Bunge
• Gentiana oregana Engelm. ex Gray accepted as Gentiana affinis Griseb.
• Gentiana pallidocyanea J. Pringle
• Gentiana parryi Engelm.
• Gentiana pennelliana Fern.
• Gentiana platypetala Griseb.
• Gentiana plebeja Ledeb. ex Spreng. accepted as Gentianella amarella (L.) Boerner
• Gentiana plurisetosa C.T. Mason
• Gentiana porphyrio J.F. Gmel. accepted as Gentiana autumnalis Linnaeus
• Gentiana procera Holm accepted as Gentianopsis virgata (Raf.) Holub
• Gentiana propinqua Richards. accepted as Gentianella propinqua (Richards.) J. Gillett
• Gentiana prostrata Haenke
• Gentiana puberula auct. non Michx. accepted as Gentiana puberulenta J. Pringle
• Gentiana puberula Michx. accepted as Gentiana saponaria Linnaeus
• Gentiana puberulenta J. Pringle
• Gentiana quadrangularis Lam. accepted as Cicendia quadrangularis (Lam.) Griseb.
• Gentiana quinquefolia Linnaeus accepted as Gentianella quinquefolia (L.) Small
• Gentiana richardsonii Porsild accepted as Gentianopsis detonsa (Rottb.) Ma
• Gentiana romanzovii Ledeb. ex Bunge accepted as Gentiana algida Pallas
• Gentiana rubricaulis Schwein.
• Gentiana rusbyi Greene accepted as Gentiana affinis Griseb.
• Gentiana saponaria Linnaeus
• Gentiana sceptrum Griseb.
• Gentiana scopulorum (Greene) Tidestrom accepted as Gentianella amarella (L.) Boerner
• Gentiana septemfida Pallas
• Gentiana setigera auct. non Gray accepted as Gentiana plurisetosa C.T. Mason
• Gentiana setigera Gray
• Gentiana simplex Gray accepted as Gentianopsis simplex (Gray) Iltis
• Gentiana strictiflora (Rydb.) A. Nels. accepted as Gentianella amarella (L.) Boerner
• Gentiana tenella Rottb. accepted as Gentianella tenella (Rottb.) Boerner
• Gentiana thermalis Kuntze accepted as Gentianopsis thermalis (Kuntze) Iltis
• Gentiana tiogana Heller accepted as Gentiana newberryi Gray
• Gentiana tonsa (Lunell) Victorin accepted as Gentianopsis macounii (Holm) Iltis
• Gentiana tortuosa M.E. Jones accepted as Gentianella tortuosa (M.E. Jones) J. Gillett
• Gentiana ventricosa Griseb. accepted as Gentianopsis crinita (Froel.) Ma
• Gentiana verna Linnaeus
• Gentiana verticillata Linnaeus accepted as Enicostema verticillatum (L.) Engl. ex Gilg
• Gentiana villosa Linnaeus
• Gentiana wislizeni Engelm. accepted as Gentianella wislizeni (Engelm.) J. Gillett
• Gentiana wrightii Gray accepted as Gentianella wrightii (Gray) Holub
• Gentianaceae de Jussieu, 1789
• Gentianaceaeformis B. Biswas, 1962 † (uncertain)
• Gentianales
• Gentianales (awaiting allocation) (temporary name)