| Philadelphus gordonianus Lindl. | | | | 04347796 | |
| Philadelphus gordonianus Lindl. | D. Douglas s.n. | United States of America. Columbia River. | isotype | 186316 |  |
| Philadelphus gordonianus Lindl. | | | | 4347736 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383261 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383262 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383263 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383264 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383265 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383266 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383268 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383269 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383270 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383271 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383272 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383267 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 4383273 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 04383397 |  |
| Philadelphus gordonianus Lindl. | | | | 4347735 |  |
| Philadelphus gordonianus Lindl. | | | | 4347733 |  |
| Philadelphus lewisii var. gordonianus (Lindl.) Jeps. | | | | 04383260 |  |