is one of the most widely distributed beach plants throughout tropical and subtropical areas in the world. It occurs along the beaches, coastal strands and tropical islands of tropical North and South America, east central Africa, west central Africa, India, Asia, and Australia. In North America, I. pes-caprae
occurs from Florida, and west through the Gulf of Mexico and the Bahamas. Its range extends from approximately 30? North latitude to 30? South latitude. The extent of these limits are directly determined by climate, as I. pes-caprae
does not tolerate prolonged frost conditions. Railroad vine occurs throughout the Indian River Lagoon on coastal dunes, scrub and some upland areas.