According to Kew Gardens, it is from Central America and probably Cuba and Florida.   After going through the photos and labels for specimens in the S , Tolerance, Unknown Some tolerance to salty wind but not direct salt spray. , Considertions, Noted for being weedy. , Habitat, Disturbed. Old orange groves, pasture, roadsides. May occur naturally along the west FL coast including shell mounds and dunes . All records for in , Did You Know?, Showy flowers

If grown in a freshwater environment, S. patens will grow much bigger. Use as a shoreling stabilization plant on edges of sand beaches and saltmarsh. , Tolerance, Tolerant of occasional/brief inundation such as can occur in storm surges. High. Can tolerate significant and ongoing amounts of salty wind and salt , Wildlife, Birds and other animals eat the seeds. , Habitat, Salt and brackish water of shores, farmlands, marshes, dunes. , Did You Know?, Interesting foliage, Hurricane wind resistance