| Pachylophus australis Wooton & Standl. | Oenothera brachycarpa A.Gray sect. Megapterium |
| Pachylophus canescens (Torr. & FrĂ©m.) Piper | Oenothera canescens Torr. & Frém. sect. Gauropsis |
| Pachylophus cespitosa (Nutt.) Raimann | Oenothera cespitosa Nutt. sect. Pachylophus |
| Pachylophus glaber A.Nelson | Oenothera cespitosa Nutt. sect. Pachylophus |
| Pachylophus psammophilus A.Nelson & J.F.Macbr. | Oenothera psammophila (A.Nelson & J.F.Macbr.) Wagner et al. sect. Pachylophus |