| Locality: | United States. Kentucky. Madison: Lower Silver Creek Reservoir (B Lake), 19.3 surface acres, created in 1939, elevation 980 feet, 1.9 mi W of US 421-25 and Ky 21 at Bighill, and 0.7-1.1 mi S of Ky 21 on maintenance road, Berea College Forest, Knobs Section . |
| Habitat: | Western Mesophytic Forest, Emergent Marsh [Typha-Carex-Eleocharis]; infrequent. Associates: Acorus calamus, Scirpus cyperinus, Saggitaria australis, Polygonum amphibium, Ludwigia alternifolia, Leersia oryzoides. |
| Collector: | Rudy A. Gelis, Doug A. Wireman R-59 |