| Name | Carex supina var. costata Meinshausen |
| Authorship | Meinshausen |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Carex supina Willdenow |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Carex supina var. costata Meinshausen |
| Identification made in | [no date] (2) |
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