| Locality: | United States. Kentucky. Madison: Owsley Fork Reservoir, 151 surface acres created in 1974, elevation 820 feet, 1.5 mi E of Bighill from the jct of US 25-421 on Ky 21 and 0.5-1.4 mi SE off Radford Hollow Road, Berea College Forest, Knobs Section, Western Mesophytic Forest. |
| Habitat: | Western Mesophytic Forest. Seasonally Dewatered Flats [Typha-Juncus-Scirpus]; infrequent. Associates: Leersia oryzoides, Rotala ramosior, Diodia virginiana, Polygonum ssp., Impatiens capensis. |
| Collector: | Ralph L. Thompson, Rudy A. Gelis R-563 |