Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1669506
| DC | District of Columbia | [No locality information provided] | 1896 |
02070010
| Middle Potomac-Anacostia-Occoquan | unknown |
1669015
| DC | District of Columbia | Columbia Island, between Boundary Channel and Potomac River, E of Arlington National Cemetery | 1989 |
02070010
| Middle Potomac-Anacostia-Occoquan | unknown |
1668645
| DC | District of Columbia | Rock Creek Park, sandbar in Rock Creek E of Lightpost #265 on Beach Dr Rock Creek Park and Vicinity | 1988 |
02070010
| Middle Potomac-Anacostia-Occoquan | unknown |