| Meriolix drummondiana (Spach) Small, 1903 |
| Microcarpium Munz, 1944 |
| Myrtocarpus (Munz) H. Hara, 1953 |
| Nutantigemma W. Dietr. & W.L. Wagner, 1987 |
| Oenothera L., 1753 |
| Oenothera L., 1753 |
| Oenothera L., 1753 |
| Oenothera albicaulis Pursh, 1814 |
| Oenothera amplexicaulis Wooton & Standl., 1941 |
| Oenothera angelorum S. Watson, 1889 |
| Oenothera anomala Curtis, 1797 |
| Oenothera arizonica (Munz) W.L. Wagner, 1998 |
| Oenothera berlandieri (Spach) Spach ex D. Dietr., 1840 |
| Oenothera berlandieri subsp. berlandieri (Spach) Spach ex D. Dietr., 1840 |
| Oenothera biennis L., 1753 |
| Oenothera boothii Douglas, 1832 |
| Oenothera boothii subsp. condensata (Munz) Munz, |
| Oenothera boquillensis (P.H. Raven & D.P. Greg.) W.L. Wagner & Hoch, 2007 |
| Oenothera brachycarpa A. Gray, 1852 |
| Oenothera brandegeei (Munz) P.H. Raven, 1971 |