| Cyperaceae | |
Oreobolus obtusangulus fo. borealis
| C.B. Clarke | Beib. Bot. Jahr. 68: 44 | 1901 |
| Cyperaceae | ** |
Oreobolus obtusangulus fo. borealis
| Skottsb. | Veröff. Geobot. Inst. Rübel Zürich 3: 88 | 1925 |
| Cyperaceae | |
Oreobolus obtusangulus subsp. obtusangulus
| | | |
| Cyperaceae | |
Oreobolus obtusangulus subsp. rubrovaginatus
| (Kük.) T. Koyama | Mem. New York Bot. Gard. 18: 27 | 1969 |
| Cyperaceae | |
Oreobolus obtusangulus var. rubrovaginatus
| Kük. | Repert. Spec. Nov. Regni Veg. 48: 69 | 1940 |
| Cyperaceae | |
Oreobolus obtusangulus subsp. unispicus
| Seberg | Bot. J. Linn. Soc. 96: 163 | 1988 |