| Locality: | United States. Kentucky. Clark: Ford Quadrangle, 0.9 mi W of jct Ky. 1924 on Ky. 418 (Athens-Boonesboro Road), and 0.2 mi E of Lisletown (Halls on the River) adjacent to Kentucky River |
| Habitat: | Abandoned limestone quarry; one of the dominant species of the Salix-Typha-Juncus Scirpus wetland and drainway; frequent. Associates: Equisetum hyemale, Acer negundo, Salix exigua, Acer saccharinum. |
| Collector: | Ralph L. Thompson, J. Richard Abbott 94-203 |