| Taxon | Collector | Location | Type Status | Barcode | |
|---|---|---|---|---|---|
| Philadelphus angustifolius Rydb. | Mrs. B. Willis s.n. 1883 | United States of America. Washington. Palace Camp. | type | 186305 |  |
| Philadelphus angustifolius Rydb. | Mrs. B. Willis s.n. 1883 | United States of America. Washington. Tacoma, W. T. (Washington Territory?). | isotype | 186306 |  |