| Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
|
41344
| OR | Morrow | Willow Creek Reservoir, 1 mile southeast of Heppner on Western Route Road. | 2001 |
17070104
| Willow | established |
|
297274
| OR | Morrow | Willow Creek Reservoir, 1 mile southeast of Heppner on Western Route Road. | 2009 |
17070104
| Willow | established |
|
297280
| OR | Morrow | Willow Creek Reservoir, 1 mile southeast of Heppner on Western Route Road. | 2013 |
17070104
| Willow | established |