Centres of Plant Diversity. Along with Brazil, Mexico is the American country with the largest number of Centres of Plant Diversity . These centres were selected due to their great diversity of plant species, high number of endemic species, high diversity of habitats, high proportion of species adapted to special conditions of soil, and also because of the degree of threat of deterioration.

Of 75 centres in the Americas, 13 are in Mexico: Lacandon Jungle, Chiapas; Uxpanapa-Chimalapas, Oaxaca / Veracruz / Chiapas; Sierra Juárez, Oaxaca; Tehuacán-Cuicatlán, Puebla / Oaxaca; Cañón del Zopilote, Guerrero; Sierra of Manantlan and lowlands of Jalisco; Upper basin of the Rio Mezquital, Durango; Gómez Farías Region, Tamaulipas; Cuatro Cienegas, Coahuila; Sierra Madre Occidental, Chihuahua; and central and northern Baja California.