The phytogeography ofAnthurium (Araceae) is discussed for Central America on a sectional basis and notes are presented about the general distribution ofeach section representedas itoccurs elsewhere. Out ofa total of 221 species in Central America, Mexico has 41 species, Guatemala 25, Nicaragua 30, Costa Rica 76 and Panama 155. Section Porphyrochitonium is the largest section with 56 species, followed by Belolonchium (46 species), Pachyneurium (32 species), Cafomystrium (23 species) and Xialophyllium (12 species); all ofthe remaining 12 sections contain fewer than eight species, with eight sections having four or fewer species. While species in section Schizoplacium and section Belolonchium (both A. andicola Liebm. alliance, and A. verapazense Engl. alliance) are predominantly or wholly Mexican, most sections have the bulk oftheir species in Costa Rica and Panama, especially the latter. Anthurium habitats in Mexico tend to have relatively low species diversity, while those in Costa Rica and Panama have high species diversity.
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