Morus celtidifolia  Morus celtidifolia, the Texas mulberry, is a plant species native to South America, Central America, Mexico, and the southwestern United States, ranging from Argentina north as far as Arizona and Oklahoma. In the USA, it grows in canyons and on slopes, usually near streams, from elevation. It is very often referred to as ""Morus microphylla"," including in Flora of North America, but recent studies suggest that these names are synonymous with "M. celtidifolia" holding priority. "Morus celtidifolia" is a shrub or tree, sometimes reaching in height. It has much smaller leaves than the other two species in the United States ("M. alba" and "M. rubra"), the blade usually less than long. The edible fruits are red, purple, or nearly black, and are consumed by wildlife, and, historically, by Native Americans. In ancient (probably prehistoric) times, the Havasupai people introduced the species to the Grand Canyon.