ABSTRACT
In the conterminous United States, the tropical and subtropical humid forest ecoregion occurs only in southern Florida. Biodiversity is very high in this ecoregion, which contains many species of plants, including epiphytes. The tropical humid forest zone of southern Florida is biologically one of the most diverse vegetation zones in the United States. Wetlands are widespread, both saltwater and freshwater, including mangrove swamps and tropical tree islands.
