| Name | Philadelphus microphyllus subsp. occidentalis (A. Nelson) C. L. Hitchcock |
| Authorship | (A. Nelson) C. L. Hitchcock |
| Rank | Subspecies |
| Placed in | Philadelphus microphyllus A. Gray |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Philadelphus microphyllus subsp. occidentalis (A. Nelson) C. L. Hitchcock |
| Identification made in | 1941 (2) |
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