- Along Potomac, SE of Great Galls. The Potomac Valley.1
- Along canal near Plummers Island1
- Along old US Highway 40 west of Green Ridge between Little Pine Lick Hollow & Ridge Road north of junction of Fifteen Mile Creek Road with US 40, about 6 air miles east of Flintstone.1
- Along the Potomac River at Piscataway Park just east of Mockley Point.1
- Along the Potomac River west of Cabin John1
- Along the beach at Millstone, region between Leonardtown & Millstone1
- Arbutus1
- Baltimore (Md.)1
- Baltimore, Catholic Orphanage Grounds, Cold Spring Lane and Roland Avenue1
- Baltimore, ravine beyond "The Caves"1
- Bank of C. and O. Canal, between Great Falls and Cabin John1
- Bank of Wicomico River, Camp St. Charles, Rock Point1
- Bank of Yaughiogheny River below Swallow Falls, 8 miles NNW Oakland1
- Baroniak property, Dameron1
- Bato1
- Beaverdam Rd., USDA Research Center, 2 1/4 miles SE BELTSVILLE1
- Bel Alton1
- Bellsville.1
- Beltsville, Kenneth Wurdack residence, 4400 Samar St.1
- Beside apple orchard, South Farm, Plant Industry Station, 2 miles SW Beltsville1