| canada | | carex bigelowii subsp. lugens | subspecies | 3 | 0 |
| canada | northwest territories | carex bigelowii subsp. lugens | subspecies | 18 | 0 |
| canada | nunavut | carex bigelowii subsp. lugens | subspecies | 2 | 0 |
| canada | yukon | carex bigelowii subsp. lugens | subspecies | 7 | 0 |
| united states | | carex bigelowii subsp. lugens | subspecies | 3 | 0 |
| united states | alaska | carex bigelowii subsp. lugens | subspecies | 2 | 0 |