Salix bonplandiana

In Mexico, the Bonpland willow is associated with the Pacific Coast, and in southern Mexico, the range extends into internal mountain areas of Pacific, central-southwest Guatemala. Across southern Mexico, it is a species of the Trans-Mexican Volcanic Belt, The other differences between the two are S. taxofolia occurs in minor locales of the Sierra Madre Oriental cordillera, and S. bonplandiana occurs in the Sierra Madre Occidental cordillera northwest to southwest Durango. S. taxifolia occurs west of the Occidental cordillera in the south Pacific Coast north to southern Sinaloa–southwest Durango. S. bonplandiana has a few locales on the Mexican Plateau, (with both occurring in central Chihuahua, west of Chihuahua, Chihuahua). Other minor locale differences occur in central New Mexico, far west Texas, Coahuila, Nuevo Leon, and Tamaulipas. ==Ethnobiology and cultural significance==

The ahuejote tree plays a fundamental role in sustaining the chinampa agricultural system of Xochimilco, one of Mexico's most distinctive pre-Hispanic agricultural innovations. These artificial islands were constructed centuries ago using a combination of mud, plant materials, and ahuejote trees (S. bonplandiana), with the trees' extensive root systems providing structural support to prevent erosion and maintain the integrity of the chinampas. This agro-productive system has endured for more than five hundred years, with its origins tracing back to approximately 700-800 CE near the ancient city of Teotihuacan. By the late fifteenth century, the ahuejote-supported chinampas had become the principal food source for Tenochtitlan. ==References==