CCDB → Bryophytes → Aytoniaceae → Mannia
| Taxon name | Status | Median (n) |
| Mannia fragrans (Balb.) Frye & L. Clark | Accepted | 9 |
| Mannia levigata Shimizu & S. Hatt. | Accepted | 9 |
| Mannia barbifrons Shimizu & S. Hatt. | Unresolved | 9 |
| Mannia brachypoda Shimizu & S. Hatt. | Unresolved | 9 |