| Locality: | United States. Kentucky. Madison: Lower Silver Creek Reservoir (B Lake), 19.3 surface acres, created in 1939, elevation 980 feet, 1.9 miles 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. Seasonally Dewatered Flats [Polygonum-Leersia-Scirpus]; infrequent. Associates: Cyperus strigosus, Microstegium vimineum, Boehmeria cylindrical, Mimulus alatus, Penthorum sedoides, Ludwigia alternifolia. |
| Collector: | Ralph L. Thompson, Rudy A. Gelis R-261 |