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CCDB → Angiosperms → Compositae → Laennecia
| Taxon name | Status | Median (n) |
| Laennecia confusa (Cronquist) G. L. Nesom | Accepted | 9 |
| Laennecia coulteri (A. Gray) G. L. Nesom | Accepted | 9 |
| Laennecia schiedeana (Less.) G. L. Nesom | Accepted | 9 |
| Laennecia sophiifolia (Kunth) G. L. Nesom | Accepted | 9 |
| Laennecia filaginoides DC. | Synonym of Conyza filaginoides (DC.) Hieron. | 9 |
| Laennecia gnaphalioides (Kunth) Cass. | Synonym of Conyza gnaphalioides Kunth | 9 |
| Conyza confusa Cronquist | Synonym of Laennecia confusa (Cronquist) G. L. Nesom | 9 |
| Conyza coulteri A. Gray | Synonym of Laennecia coulteri (A. Gray) G. L. Nesom | 9 |
| Conyza pulchella Kunth | Synonym of Laennecia sophiifolia (Kunth) G. L. Nesom | 9 |
| Conyza sophiifolia (E. H. B. K.) Kunth | Synonym of Laennecia sophiifolia (Kunth) G. L. Nesom | 9 |