| Name | Oenothera pilosella subsp. sessilis (Pennell) Straley |
| Authorship | (Pennell) Straley |
| Rank | Subspecies |
| Placed in | Oenothera pilosella Rafinesque |
| Citation | 1977 Ann. Missouri Bot. Gard. 64(3): 412 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Oenothera pilosella subsp. sessilis (Pennell) Straley |
| Identification made in | [no date] (2) |
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