| Name | Carex extensa Goodenough |
| Authorship | Goodenough |
| Rank | Species |
| Placed in | Carex Linnaeus |
| Contains | Carex extensa var. ecklonii (Nees) Kükenthal |
| Citation | 1794 Trans. Linn. Soc. London 2: 175, t. 21, f. 7 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Carex extensa Goodenough |
| Identification made in | [no date] (3) |
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