| Cyperus erythrorhizos Muhl. |
| Currently Accepted Name: | Cyperus erythrorhizos Muhl. |
| Locality: | United States. Kentucky. Lewis: Manchester Island No. 1, 27-acres, Ohio River, Mile 396, 1.3 mi E of Trinity Sta. and 0.2 mi W of Irwin, KY 8, or 1.7 mi E of Manchester, Ohio, Ohio Manchester Islands Quad. Elev. 500-510'. |
| Habitat: | Unconsolidated Shoreline [Platanus-Betula-Salix]; occasional. Associates: C. odoratus, C. strigosus, Panicum capillare, Paspalum fluitans, Digitaria sanguinalis, P. dichotomiflorum. |
| Collector: | Rudy A. Gelis, Michelle Lee Gelis M1-880 |