ABSTRACT
This monotypic genus is endemic to the southeastern United States. There are Eocene fossils from London, England, that have been identified as this (Mabberley 1997), but Cronquist (1981) has questioned their identity. The single species was named by Alvin Wentworth Chapman (1809-1899), author of the Flora of the Southern United States in 1860. He described the genus and species in the first edition of that flora, and then went on to publish a second edition in 1883, and a third in 1897 (Correll and Johnston 1970).
