| Cyperus erythrorhizos Muhl. |
| Currently Accepted Name: | Cyperus erythrorhizos Muhl. |
| Locality: | United States. Kentucky. Lewis: Brush Creek Island, 17-acres, Ohio River, Mile 388, 2.0 mi E of Concord and 0.2 mi W of Chalkley Sta., KY 8, or 9.7 mi E of Manchester, Ohio, at Brush Creek, Concord Quad. Elev. 500-510'. |
| Habitat: | Unconsolidated Shoreline [Platanus-Betula-Salix]; occasional. Associates: Cyperus strigosus, Amaranthus spinosus, C. odoratus, Solanum carolinense, Eragrostis pectinacea, Equisetum arvense. |
| Collector: | Rudy A. Gelis, R. L. Thompson, Richard Abbott, Andy Shupe BC-611 |