| Locality: | United States. Kentucky. Madison: Cowbell Hollow, 7.0 ha borrow area for earthen dam for Cowbell FRS built in 1985, 1.0 mi W of US 421-25 and Ky 21 at Bighill, 0.3-0.6 mi S off maintenance road, Berea College Forest, Knobs Section. |
| Habitat: | Western mesophytic forest, elevation 875 feet. In: Establishment of Native Plant Species from Forest Topsoil Seed Banks on a Borrow Area in Kentucky. [Wade & Thompson 1990]. European annual, infrequent. |