Frangula betulifolia

It is native in northern Mexico in the Sierra Madre Occidental cordillera, and mountainous, desert regions of the Southwestern United States of Arizona, Utah, New Mexico, and far west Texas; besides being found in Sonora, Chihuahua and Durango of the Occidental cordillera, a large species locale occurs to the east in Nuevo León.

[1] Frangula betulifolia has large ovate leaves, and can grow to be a small tree from 3-10m tall.

[3] 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,[1] 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.

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