| Name | Cyperus lupulinus var. macilentus (Fernald) A. Haines |
| Authorship | (Fernald) A. Haines |
| Rank | Variety |
| Placed in | Cyperus lupulinus (Sprengel) Marcks |
| Holdings | 10 Specimens held in the Harvard University Herbaria identified as Cyperus lupulinus var. macilentus (Fernald) A. Haines |
| Identification made in | [no date] (1), 2011 (4), 2012 (3), 2013 (1), 2023 (1) |