| Cyperaceae | |
Cyperus diandrus var. bipartitus
| (Torr.) Kük. | Pflanzenr. IV, 20(101): 384 | 1936 |
| Cyperaceae | |
Cyperus diandrus var. capitatus
| Britton | Bull. Torrey Bot. Club 13(11): 205 | 1886 |
| Cyperaceae | |
Cyperus diandrus var. castaneus
| S. Watson | Bot. California 2: 214 | 1880 |
| Cyperaceae | |
Cyperus diandrus var. castaneus
| (Pursh) Torr. | Ann. Lyceum Nat. Hist. New York 3: 252 | 1836 |
| Cyperaceae | |
Cyperus diandrus fo. diandrus
| | | |
| Cyperaceae | |
Cyperus diandrus var. diandrus
| | | |
| Cyperaceae | |
Cyperus diandrus fo. elongatus
| (Britton) Fernald | Rhodora 41(489): 423 | 1939 |
| Cyperaceae | |
Cyperus diandrus var. elongatus
| Britton | Bull. Torrey Bot. Club 19(7): 226 | 1892 |
| Cyperaceae | |
Cyperus diandrus var. pauciflorus
| Alph. Wood | Class-book Bot. 732 | 1861 |