- Glenn Dale1
- Hyattsville1
- Indian Springs, 1 mile west of Greenbelt1
- Lower end of Patuxent Research Refuge, Plot 32121
- Lower end of Patuxent Research Refuge, plot 31851
- Lower end of Refuge, Plot 2129, Patuxent Research Refuge1
- Near Cherry Hill Rd & Sellman Rd., 2 miles W. Beltsville.1
- Near Reeds Lock in swamp, Chesapeake & Ohio Canal1
- No data1
- Paint Branch Creek, 2¼ miles west of Beltsville1
- Patuxent Research Refuge, 3 miles NW Bowie.1
- Patuxent Research Refuge, Cash Lake, Plot 43841
- Patuxent Research Refuge, NW of buildings Plot 16781
- Patuxent Research Refuge, Plot 16861
- Patuxent Research Refuge, Plot 26661
- Patuxent Research Refuge, Plot 26681
- Patuxent Research Refuge, Plot 26701
- Patuxent Research Refuge, Plot 4467, between North Telegraph and Kluckhuhn Roads1
- Patuxent Research Refuge, Plot 53441
- Patuxent Research Refuge, field along Kluckhuhn Road, near barn, Plot 44591