CCDB is a community resource. If you are aware of any missing data or if any of the counts are erroneous, please submit new counts, or report erroneous counts.
CCDB → Angiosperms → Onagraceae → Hartmannia
| Taxon name | Status | Median (n) |
| Oenothera dissecta A. Gray | Synonym of Hartmannia dissecta (A. Gray) Rose | 14 |
| Hartmannia tetraptera (Cav.) Small | Synonym of Oenothera tetraptera Cav. | 7 |