| equisetum arvense subsp. alpestre | | Canada: Northwest Territories, Banks Island, Parker River Valley, N side c. 7 km from sea | | 459993017 |
| equisetum arvense subsp. alpestre | | Canada: Northwest Territories, Melville Island, McCormick Inlet Sandy raised river terraces along major river 7 km W of head of inlet Loc. # 45 | | 459993012 |
| equisetum arvense subsp. alpestre | | Canada: Northwest Territories, Mainland Northwest Territories, Paulatuk, East of Paulatuk, adjacent to Darnley Bay | | 459993010 |
| equisetum arvense subsp. alpestre | | Canada: Northwest Territories, Banks Island, De Salis Bay, Flat plain along Sandhill River, 1.5-2km from mouth | | 459993004 |
| equisetum arvense subsp. alpestre | | Canada: Northwest Territories, Victoria Island, Minto Inlet, Dry south facing slope of cliff, 5 km NE of head of Minto Inlet | | 459992991 |
| equisetum arvense subsp. alpestre | | Canada: Northwest Territories, Anderson River, Cape Bathurst E side, brook system N of river from Lake McKinlay, 0.7-1.5 km from sea | | 459992989 |
| equisetum arvense subsp. alpestre | | Canada: Northwest Territories, Tuktoyaktuk, Tuktoyaktuk Area #17 | | 459992978 |