|Locality:||United States. Kentucky. Garrard: Camp Nelson Quarry, an Ordovician limestone quarry, abandoned in 1991, 1.7 mi off KY 1845 from junction of US 27 and 1.0 mi WNW of Lambert Methodist Church, 12.2 mi. N of Lancaster.
|Habitat:||An Ordovician limestone quarry, abandoned in 1991. Ponded area under limestone quarry cut. Native aquatic free-floating annual, infrequent.