| Classification | Onagraceae |
| Classification 1 | Onagraceae: Oenothera |
| Classification 2 | Onagraceae: Pachylophus |
| Harvard University Herbaria Barcode(s) | 00872046 |
| Type Status | Isolectotype |
| Collector | E. D. Merrill & E. N. Wilcox |
| Collector number | 888 |
| Country | United States of America |
| State | Idaho |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Idaho: Fremont County |
| Locality | 10 mi west of St. Anthony Idaho |
| Date Collected | 1901-07-08 |
| Habitat | Sand hills |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/99f19c08-ec28-4f3e-9c78-cfaed9675ef0 |
| Harvard University Herbaria Barcode | 00872046 |
| Herbarium | GH |
| Family | Onagraceae |
| Determination | Pachylophus sp. |
| Determination Remarks | [is label name] |
| Annotation Text | Pachylophus caespitosus caulescens A. Nelson [ined.] |
| Family | Onagraceae |
| Determination | Oenothera caespitosa f. psammophila (A. Nelson & J. F. Macbride) Munz |
| Determined by | PAM [P. A. Munz] |
| Date Determined | 1930 |
| Determination Remarks | [0] |
| Family | Onagraceae |
| Determination | Oenothera psammophila (A. Nelson & J. F. Macbride) W. L. Wagner, Stockhouse & W. M. Klein |
| Determined by | Wagner, Warren Lambert |
| Date Determined | 1980 |
| Determination Remarks | [is Current name] |
| Family | Onagraceae |
| Type Status | Isolectotype |
| Isolectotype of | Pachylophus psammophilus A. Nelson & J. F. Macbride |
| Verified by | Wagner, Warren Lambert |
| Date Determined | 1980 |
| Determination Remarks | [is filed under name] |
| Taxon Reference | (for Pachylophus psammophilus A. Nelson & J. F. Macbride) Bot. Gaz. 1916. 61: 32. |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
