CCDB → Angiosperms → Compositae → Onoseris
| Taxon name | Status | Median (n) |
| Onoseris albicans (D. Don) Ferreyra | Accepted | 18 |
| Onoseris hyssopifolia Kunth | Accepted | 15 |
| Onoseris odorata (D. Don) Hook. & Arn. | Accepted | 18 |
| Onoseris montevidensis Spreng. | Synonym of Noticastrum diffusum (Pers.) Cabrera | 9 |