| Name | Carex laxiflora var. latifolia Boott |
| Authorship | Boott |
| Rank | Variety |
| Placed in | Carex laxiflora Lamarck |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Carex laxiflora var. latifolia Boott |
| Identification made in | [no date] (1) |