| Classification | Rhamnaceae: Rhamnus |
| Classification 1 | Rhamnaceae: Frangula |
| Harvard University Herbaria Barcode(s) | 00425974 |
| Collector | J. P. Tracy |
| Collector number | 17012 |
| Country | United States of America |
| State | California |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: California: Humboldt County |
| Locality | Willow Creek Canyon, along Trinity Highway |
| Date Collected | 1941-09-04 |
| Verbatim Elevation | 2000 feet |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/96dfd6c0-b175-45f3-b6c2-d272b701f000 |
| Harvard University Herbaria Barcode | 00425974 |
| Herbarium | GH |
| Family | Rhamnaceae |
| Determination | Rhamnus californica subsp. occidentalis (Howell ex Greene) C. B. Wolf |
| Determination Remarks | [current name] |
| Family | Rhamnaceae |
| Determination | Frangula californica subsp. occidentalis (Howell ex Greene) Kartesz & Gandhi |
| Determination Remarks | [filed under] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
