| Author | Title | Journal/publisher | Literature ref. no. |
| Martins, E.S. (1990) | Boraginaceae | Flora Zambesiaca 7(4) | 223 |
Note that the process of capturing references from species to the literature and the reverse may be incomplete.
| Species found: 2 |
| Cynoglossum amplifolium |
| Cynoglossum lanceolatum |