Aridoamerica

Aridoamerica denotes an ecological region spanning Northern Mexico and the Southwestern United States, defined by the presence of the culturally significant staple foodstuff Phaseolus acutifolius, a drought-resistant bean. Its dry, arid climate and geography stand in contrast to the verdant Mesoamerica of present-day central Mexico into Central America to the south and east, and the higher, milder "island" of Oasisamerica to the north. Aridoamerica overlaps with both. Because of the relatively hard conditions, the pre-Columbian people in this region developed distinct cultures and subsistence farming patterns. The region has only to of annual precipitation. The sparse rainfall feeds seasonal creeks and waterholes. The term was introduced by American anthropologist Gary Paul Nabhan in 1985, building on prior work by anthropologists A. L. Kroeber and Paul Kirchhoff to identify a "true cultural entity" for the desert region. Kirchhoff was first in introducing the term 'Arid America', in his 1954 seminal article, writing: "I propose for that of the gatherers the name "Arid America" and "Arid American Culture," and for that of the farmers "Oasis America" and "American Oasis Culture"". Mexican anthropologist Guillermo Bonfil Batalla notes that although the distinction between Aridoamerica and Mesoamerica is "useful for understanding the general history of precolonial Mexico," that the boundary between the two should not be conceptualized as "a barrier that separated two radically different worlds, but, rather, as a variable limit between climatic regions." The inhabitants of Aridoamerica lived on "an unstable and fluctuating frontier" and were in "constant relations with the civilizations to the south." The Chichimeca, an umbrella term for several tribes used by the Nahua people, were hunter-gatherers in Aridoamerica grasslands. They gathered magueys, yucca flowers, mesquite beans, chia seeds, and cacti, including the paddles of fruits of nopal cactus. The century plant (Agave americana) is a particularly important resource in the region.