| Author | Title | Journal/publisher | Literature ref. no. |
| Geerinck, D. (1992) | Orchidaceae (seconde partie) | Flore d'Afrique Centrale Jardin botanique national de Belgique | 649 |
Note that the process of capturing references from species to the literature and the reverse may be incomplete.
| Species found: 4 |
| Calyptrochilum christyanum |
| Polystachya fusiformis |
| Polystachya galeata |
| Polystachya hastata |