Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1757821
| OR | Clatsop | Near Quinn's Island, Lower Columbia River | 2014 |
17080003
| Lower Columbia-Clatskanie | |
1757820
| OR | Clatsop | Site 2, Welsh Island, Lower Columbia River | 2014 |
17080003
| Lower Columbia-Clatskanie | |
1757819
| OR | Clatsop | Welsh Island, Lower Columbia River | 2014 |
17080003
| Lower Columbia-Clatskanie | |
1669400
| OR | Columbia | Along State Hwy 47, ca 4.1 mi SW of its jct with US Hwy 30 in Clatskanie | 2007 |
17080003
| Lower Columbia-Clatskanie | unknown |