| Name | Oenothera deltoides subsp. cognata (Jepson) W. M. Klein |
| Authorship | (Jepson) W. M. Klein |
| Rank | Subspecies |
| Placed in | Oenothera deltoides Torrey & Fremont |
| Citation | 1962 Aliso 5(2): 180 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Oenothera deltoides subsp. cognata (Jepson) W. M. Klein |
| Identification made in | [no date] (3) |
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