View photos of the edible and medicinal plant, Prunus serotina var. rufula (Black cherry), profiled in Wild Edible Series: Arizona and Texas: Vol 1, and Medicinal Plants of the Western Mountain States.

A passage from Wild Edible Plants of Arizona:

Usually in proximity to a draw or creek, look for the small tree from Flagstaff and Prescott, south to Sierra Vista and Bisbee.

A passage from Wild Edible Plants of Texas (Vol 1):

Black cherry fruit is edible fresh picked from the tree or prepared as a jam/jelly. When ripe they are sweet
and have a very pleasant wild cherry (hint of bitter) flavor.

A passage from Medicinal Plants of the Western Mountain States:

The plant’s particular cyanogenic glycoside content, a compound group common to many plants within the Rose family, is at least partly responsible for its sedative activity on the pneumal and cardiovascular systems. Even for straight–forward heart palpitations dependent on debility, psychosomatic responses to stress, or overexertion, Wild cherry (Black cherry) is calming.