| Locality: | United States. Kentucky. Calloway: The Hancock Biological Station, Murray State University, located 1.5 mi. NE on Lancaster Road from jct. of KY 94, and 0.8 mi. east from jct. of Lancaster Road at 561 Emma Drive; Rushing Creek Quad., latitude 36°44'04 N, longitude 88°06'57 W. Watersport Cove meadow. |
| Habitat: | Bodine-Brandon cherty silt loam soils derived from Loess and Fort Payne Geological Systems. Emergent wetland. Abundant; native annual. |