Ruellia brittoniana Leonard (Acanthaceae) is native to Argentina Northeast, Argentina Northwest, Bolivia, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Cayman Is., Costa Rica, Cuba, Dominican Republic, Ecuador, Guatemala, Haiti, Honduras, Jamaica, Leeward Is., Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Panamá, Paraguay, Peru, Puerto Rico, Trinidad-Tobago, Uruguay, Windward Is..
