| Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
|
1438368
| CA | San Diego | San Diego River watershed, palustrine emergent wetland ringing Santee Lakes shoreline. Former sewage treatment ponds now public park. Active weed control in progress. | 2005 |
18070304
| San Diego | established |
|
262743
| WA | Cowlitz | Longview, near junction of Oak Street and 36th Avenue | 2005 |
17080003
| Lower Columbia-Clatskanie | established |