| Author | Title | Journal/publisher | Literature ref. no. |
| Retief, E. & Herman, P.P.J. (1997) | Plants of the northern provinces of South Africa: keys and diagnostic characters | Strelitzia 6 1-681 | 402 |
Note that the process of capturing references from species to the literature and the reverse may be incomplete.
| Species found: 4 |
| Barleria senensis |
| Cyphostemma spinosopilosum |
| Indigofera circinnata |
| Pentzia incana |