| Author | Title | Journal/publisher | Literature ref. no. |
| Bromilow, C. (2010) | Problem Plants and Alien Weeds of South Africa | Briza Publications, South Africa | 762 |
Note that the process of capturing references from species to the literature and the reverse may be incomplete.
| Species found: 9 |
| Catharanthus roseus |
| Cyperus esculentus |
| Cyperus rotundus |
| Nicandra physalodes |
| Oxalis corniculata |
| Oxalis latifolia |
| Senna hirsuta |
| Tribulus terrestris |
| Verbena aristigera |