A new species, Dicerandra fumella, is described for the Florida panhandle and adjacent Alabama and compared with other taxa in the D. linearifolia complex. An extensive hybrid zone between this new species and D. linearifolia var. robustior is located in the Marianna Lowland, west of the Apalachicola River in Florida. Dicerandra linearifolia, given the superfluous name “Ceranthera linearifolia” by Stephen Elliott nearly 200 years ago and the type for his Ceranthera, can no longer be considered pandemic to the southeastern coastal plain of the United States.