Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1737515
| MD | Montgomery | [No locality description provided; coordinates obscured by collector] | 2019 |
02070008
| Middle Potomac-Catoctin | |
1677689
| MD | Montgomery | [No locality description provided] | 2017 |
02070008
| Middle Potomac-Catoctin | |
1674513
| MD | Montgomery | [No locality description provided] | 2019 |
02070008
| Middle Potomac-Catoctin | |
613348
| MD | Montgomery | Potomac River, Plummer's Island, 0.25 miles below I-495, SW of Bethesda | 1995 |
02070008
| Middle Potomac-Catoctin | established |
280541
| MD | Montgomery | Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda | 1995 |
02070008
| Middle Potomac-Catoctin | established |