United States: Florida: Levy County. Devil's Hammock Wildlife Management Area; 7.7 miles SW of junction with Alt. U.S. 27 (in Bronson) on FL 24 to the Parker Field entrance, then 0.7 mile NW to large clearing (parking area); maintained ruderal roadside (in bottomland forest). Associates: Paspalum spp., Conoclinium coelestinum, Dichondra, Panicum spp., Acalypha arvensis, Rhynchospora spp., Boehmeria, Viola sororia, Mitreola petiolata, Chasmanthium, Eustachys, Scleria, Melochia, Axonopus. A few rhizomatous patches seen; corolla yellow with brownish markings in throat. Lat. 29°22'9.0"N Long. 82°43'58.9"W. (NAD 27).