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

There is a natural dwarf form that is associated with xeric uplands.  I makes a nice, low-growing shrub in casual gardens. Good as a background or he , Tolerance, Tolerant of occasional/brief inundation such as can occur in storm surges. Moderate. Tolerant of salty wind and may get some salt spray. Exposure t , Considertions, It is flammable, so plant away from buildings in fire-prone areas. It fixes nitrogen with its roots like a legume, so it tolerates poor soils. , Wildlife, Good wildlife cover. Seeds eaten by birds. , Habitat, Wet-dry sites. Upland mixed forest, floodplains, wetland edges, cutthroat seeps, old fields, scrub, fencerows , Did You Know?, Hurricane wind resistance Larval host for banded hairstreak (Satyrium calanus) and red-banded hairstreak (Calycopis cecrops)butterflies.