Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
41938
| OR | Gilliam | Willow Creek Arm (John Day Pool), 9 miles east of Arlington. | 2001 |
17070104
| Willow | established |
296291
| OR | Gilliam | Willow Creek Arm (John Day Pool), 9 miles east of Arlington. | 2009 |
17070104
| Willow | established |
296297
| OR | Gilliam | Willow Creek Arm (John Day Pool), 9 miles east of Arlington. | 2013 |
17070104
| Willow | established |
41340
| OR | Morrow | Willow Creek Reservoir, 1 mile southeast of Heppner on Western Route Road. | 2001 |
17070104
| Willow | established |
297278
| OR | Morrow | Willow Creek Reservoir, 1 mile southeast of Heppner on Western Route Road. | 2009 |
17070104
| Willow | established |
297284
| OR | Morrow | Willow Creek Reservoir, 1 mile southeast of Heppner on Western Route Road. | 2013 |
17070104
| Willow | established |