| Hartmannia boliviana | Oenothera multicaulis Ruiz & Pav. sect. Xanthocoryne |
| Hartmannia dissecta | Oenothera dissecta A.Gray ex S.Watson sect. Leucocoryne |
| Hartmannia havardii | Oenothera havardii S.Watson sect. Paradoxus |
| Hartmannia montana | Oenothera orizabae W.L.Wagner sect. Leucocoryne |