- Northern Portion of Washington Biologist's Field Club, opposite Plummer's Island1
- Northwest corner of Washington Biologists Field Club Property, opposite Plummer's Island1
- On the Rock Creek1
- Piedmont, District of Columbia, Potomac River, Roosevelt Island, south end.1
- Piedmont, Potomac River, 0.1 miles below Fletcher's Boathouse.1
- Plumber's Island, West Knoll1
- Potomac1
- Potomac Valley.1
- Potomac banks.1
- Potomac.1
- Rock Creek Park, Washington1
- Rock Creek Park.1
- Rock Creek, D.C1
- Sandy Landing near spring above Plummers Island on Virginia side1
- Tacoma Park1
- Takoma [Tacoma]1
- Trail to ferry, mainland opposite Plummer's Island1
- U.S. Botanic Garden at Smithsonian Institution1
- Washington D. C.1
- Washington, DC1