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Place
- Maryland[remove]162
- North America162
- USA162
- Prince George's60
- Garrett22
- Montgomery9
- Cabin John6
- Plummer's Island5
- Anne Arundel4
- Charles3
- Cunningham Swamp, at Western Maryland 4H Center ca. 10 mi SSE of Grantsville3
- Patuxent Research Refuge, Plot 16783
- Saint Mary's3
- "The Glades," 4.2 miles east of McHenry2
- Frederick2
- Liverpool2
- Negro Mt. Bog, 6 mi SW of Grantsville2
- Negro Mt. Bog, 6 mi. SW of Grantsville2
- Patuxent Research Refuge, Plot 16862
- Patuxent Research Refuge, Plot 16872