| Name | Carex extensa var. ecklonii (Nees) Kükenthal |
| Authorship | (Nees) Kükenthal |
| Rank | Variety |
| Placed in | Carex extensa Goodenough |
| Citation | 1909 Pflanzenr. [Engler] IV, 20(38): 667 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Carex extensa var. ecklonii (Nees) Kükenthal |
| Identification made in | [no date] (1) |