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Floristic composition

Although floristic similarity at species level can be very different among disjunct areas of dry forest, some common factors should be emphasized. First, Leguminosae is the most species-rich family in all areas with the exception of the Caribbean and Florida where Myrtaceae predominate. Second, Cactaceae are often both common and one of the most species-rich and abundant families. Third, there are a few woody families that are more abundant in dry forest vegetation than elsewhere, and in this sense are characteristic of this vegetation. These are Capparaceae, Zygophyllaceae (especially in Central America) and Malvaceae subfamily Bombacoideae. Erythroxylaceae are common, but also characteristic of the Brazilian cerrados (a tropical savanna), and Bursera (Burseraceae) is very common in Mexican dry forest. Dry forestss  usually have a closed canopy, with a sparse ground flora that often contains Bromeliaceae, Asteraceae, Malvaceae subfamily Malvoideae, Araceae, Portulacaceae and Marantaceae, and rather few grasses.