- Patuxent Research Refuge, Plot 36412
- Patuxent Research Refuge, west shore of Cash Lake, Plot 43842
- Somerset2
- Washington2
- West shore of Cash Lake, Patuxent Research Refuge2
- Adelphi Rd., 1 1/2 miles NE. Adelphi1
- Along Marshyhope Cr.1
- Along canal near Plummers Island1
- Along the Potomac River west of Cabin John1
- Annapolis1
- Baltimore1
- Baltimore, Catholic Orphanage Grounds, Cold Spring Lane and Roland Avenue1
- Bank of Wicomico River, Camp St. Charles, Rock Point1
- Bank of Yaughiogheny River below Swallow Falls, 8 miles NNW Oakland1
- Baroniak property, Dameron1
- Beside apple orchard, South Farm, Plant Industry Station, 2 miles SW Beltsville1
- Bethesda1
- Bluff forest N.W. of buildings, Plot 1679, Patuxent Research Refuge1
- Bluff forest N.W. of buildings, Plot 2670, Patuxent Research Refuge1
- Burnt Hills1