| Taxon | Collector | Location | Type Status | Barcode | |
|---|---|---|---|---|---|
| Philadelphus confusus Piper | O. D. Allen 221 13 Aug 1896-17 Aug 1896 | United States of America. Washington. Cascade Mountains; Tum-Tum mountain. | isotype | 186311 |  |
| Philadelphus confusus Piper | O. D. Allen 221 13 Aug 1896-17 Aug 1896 | United States of America. Washington. Cascade Mountains; Tum-Tum mountain. | isotype | 186312 |  |
| Philadelphus confusus Piper | H. Swift 74030 03 Jun 1941 | United States of America. New York. Bronx Co. Bronx. Collection. Cultivated in the New York Botanical Garden. | 03377262 |  | |
| Philadelphus confusus Piper | 4347792 |  | |||
| Philadelphus confusus Piper | 4347793 |  |