Type Concept Sentence: These are relatively species-poor dry forests but with high plant endemism. They occur in seasonal climates with 800-1500 mm rainfall per year and the dry season can last two to several months. The canopy is somewhat open, mostly deciduous and 6-15 m height, with emergent trees only in locations with higher precipitation. A lower layer may or may not be present and typically is mostly evergreen, ground vegetation is sparse. Lower annual precipitation on a limestone substrate and shallow soils results in a dense shrub layer about 2-4 m high.