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Place
- Maryland[remove]42
- Montgomery[remove]42
- North America42
- USA42
- Contact UM Herbarium10
- Cabin John4
- Glen Echo2
- Plummer's Island2
- Plummer's Island in the Potomac River, near Cabin John2
- Plummers Island2
- Plummers Island, in the Potomac River near Cabin John2
- Along the Potomac River west of Cabin John1
- Bank of C. and O. Canal, between Great Falls and Cabin John1
- Bethesda1
- Between Great Falls and Cabin John1
- Chevy Chase Lake.1
- NE Rocks Creeks, 3 mi ESE of Rockville.1
- Near Lock 7 C&O Canal1
- Paint Branch, near White Oak1
- Plummers Island, in the Potomac River, near Cabin John1