Ala., Fla., Ga., La., Miss., S.C., Tex., tropical and subtropical, North America, Mexico, West Indies in the Antilles, Central America, South America, Asia, Africa.
Varieties 4 (1 in the flora).
This species and the next are included in Christella subg. Christella by R. E. Holttum (1982).
The relationship between Old World and New World varieties is unstudied.