- Alkaline marginof Caribou Lake (2 miles east of Marsh Lake Lodge)1
- Along Alaska Highway, Fairbanks1
- Along Indian Pass Brook above Rocky Falls, 5½ miles SW of North Elba1
- Along Mount Megunticook - Maiden Cliff, Ridge Cliff, & Megunticook trails, beginning ca. 3 mi. NW. of and ending ca. 1.5 mi. N. of Camden1
- Alpine2
- Altoona Swamp at Piedmont, Sheperdstown1
- Angmagssalik, Tugtilik1
- Annapolis2
- Anticosti, Prince Edward Island, and Ontario; also Rocky Mountains1
- Apache1
- Arizona1
- Baffin Island, arctic archipelago, Cumberland Sd, Dutch Polar Station1
- Baffin Region3
- Baie du Cap-Vert, north side of Grindstone Island, Magdalen Islands1
- Banff1
- Barachois, Douglastown1
- Barometer Creek, Red Devil Mine, on the middle Kuskokwim River1
- Bass Lake1
- Bayfield3
- Beamers Falls, on Bruce Trail southwest of Grimsby1