Fischer, E. (1999) Scrophulariaceae Flore d'Afrique Centrale (Congo-Kinshasa, Rwanda & Burundi) Jardin Botanique National de Belgique, Bruxelles
Leistner, O.A. (ed.) (2000) Seed plants of southern Africa: families and genera Strelitzia 10
| Species | FZ divisions | Content |
| debilis (Skan) Eb. Fisch. | N,W | |
| flavus (S.Moore) I.Darbysh. & Eb.Fisch. | E | Description, Image |
| rupestris (Engl.) Eb. Fisch. | N | Description, Image |
| spicatus (Engl.) Eb. Fisch. | N,W,C,E,S | Description, Image |