Tonto National Monument

Tonto National Monument by National Parks Service

The monument is located in the Upper Sonoran ecosystem, known primarily for its characteristic saguaro cactus. Other common plants include: cholla, prickly pear, hedgehog, and barrel cactus (blooming April through June); yucca, sotol, and agave; creosote bush and ocotillo; palo verde and mesquite trees; an amazing variety of colorful wild flowers (February through March); and a lush riparian area which supports large Arizona black walnut, sycamore, and hackberry trees.