| Sagittaria calycina Engelm. |
| Currently Accepted Name: | Sagittaria calycina Engelm. |
| 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. Emergent Marsh [Juncus-Carex Panicum]; infrequent. Associates: Leersia oryzoides, Lycopus virginicus, Alisma subcordatum, Ludwigia alternifolia, Mimulus ringens. |
| Collector: | Ralph L. Thompson, Rudy A. Gelis R-567 |