| Locality: | United States. Kentucky. Clark: Abandoned limestone quarry, 0.9 mi W of jct. KY 1924 on KY 418 (Old Athens-Boonesborough Road), adjacent to Kentucky River |
| Habitat: | Abandoned limestone quarry. Native perennial, occasional, within Juncus-Typha-Salix swamp community of quarry floor. Associates: Sagittaria latifolia, Mimulus ringens, Lemna minor, Juncus effusus var. solutus, Galium tinctorium. |
| Collector: | Ralph L. Thompson & Andy E. Shupe 93-401 |