| Classification | Onagraceae: Oenothera | 
| Harvard University Herbaria Barcode(s) | 00073031 | 
| Type Status | Isotype | 
| Collector | J. A. Steyermark | 
| Collector number | 78703 | 
| Country | United States of America | 
| State | Missouri | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Missouri: Howell County | 
| Locality | Swampy sink depression and tributary drainage in wooded upland, turnpike 23 north, route 8 west, east part of section 16, 4 miles south of West Plains | 
| Date Collected | 1955-06-25 | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/99b7d548-a52d-4212-8505-fefc734cd0c9 | 
| Harvard University Herbaria Barcode | 00073031 | 
| Herbarium | GH | 
| Family | Onagraceae | 
| Type Status | Isotype | 
| Isotype of | Oenothera pilosella f. laevigata E. J. Palmer & Steyermark | 
| Taxon Reference | (for  Oenothera pilosella f. laevigata E. J. Palmer & Steyermark) Brittonia 1958. 10: 116. | 
| Family | Onagraceae | 
| Determination | Oenothera pilosella subsp. pilosella | 
| Determined by | G.B. Straley | 
| Determination Remarks | [current name] | 
| Sex | not determined | 
| Phenology | Flower | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |