| Name | Cyperus niger var. capitatus (Britton) O'Neill |
| Authorship | (Britton) O'Neill |
| Rank | Variety |
| Placed in | Cyperus niger Ruiz & Pavon |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Cyperus niger var. capitatus (Britton) O'Neill |
| Identification made in | [no date] (1) |
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