Frangula betulifolia

The core range of the birchleaf buckthorn is the northern Sierra Madre Occidental cordillera, from central Durango, north to west-southwest Chihuahua, and eastern Sonora; it also ranges just north at the Arizona-New Mexico, Sonora-Chihuahua borders, a region called the Madrean Sky Islands, of sky island mountain ranges. Other medium-sized range locales occur at: central, southwest New Mexico, (an extension east from the Mogollon Rim–White Mountains of the Arizona transition zone); the Grand Canyon of the Colorado River with the range extending upriver into the Canyon Lands of southeast Utah; western Texas; and southern Nuevo León. Other states with more minor-sized locales are Nevada, Coahuila, and Tamaulipas. ==Uses==

Various songbirds and small mammals consume the berries, which are edible but unpalatable, and deer and bighorn sheep browse the foliage. ==References==