| Author | Title | Journal/publisher | Literature ref. no. |
| Boutique, R. (1972) | Gentianaceae | Flore d'Afrique Centrale (Zaire - Rwanda - Burundi) Jardin Botanique National de Belgique | 1622 |
Note that the process of capturing references from species to the literature and the reverse may be incomplete.
| Species found: 5 |
| Exacum oldenlandioides |
| Faroa salutaris |
| Pycnosphaera buchananii |
| Schinziella tetragona |
| Swertia welwitschii |