| Oenothera flava (A. Nelson) Garrett, 1927 |
| Oenothera flava subsp. taraxacoides (Wooton & Standl.) W.L. Wagner, 1986 |
| Oenothera grandis Smyth, 1899 |
| Oenothera greggii A. Gray, 1849 |
| Oenothera guadalupensis S. Watson, 1876 |
| Oenothera hartwegii Benth., 1839 |
| Oenothera hartwegii subsp. fendleri (A. Gray) W.L. Wagner & Hoch, 2007 |
| Oenothera hartwegii subsp. pubescens (A. Gray) W.L. Wagner & Hoch, 2007 |
| Oenothera havardii S. Watson, 1885 |
| Oenothera hexandra (Ortega) W.L. Wagner & Hoch, 2007 |
| Oenothera hexandra subsp. gracilis (Wooton & Standl.) W.L.Wagner & Hoch, 2007 |
| Oenothera hexandra subsp. hexandra (Ortega) W.L. Wagner & Hoch, 2007 |
| Oenothera hirta Link, 1821 |
| Oenothera hookeri Torr. & A. Gray, 1840 |
| Oenothera jamesii Torr. & A. Gray, 1840 |
| Oenothera kunthiana (Spach) Munz, 1932 |
| Oenothera laciniata Hill, 1767 |
| Oenothera laciniata var. pubescens (Willd. ex Spreng.) Munz, 1935 |
| Oenothera luciae-julianiae W.L. Wagner, 2004 |
| Oenothera macrocarpa Nutt., 1813 |