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Published online by Cambridge University Press: 12 June 2017
The mesquite problem on southern Arizona ranges has been comprehensively described by Parker and Martin (9), and certain ecological relationships of this noxious tree, insofar as are known, have recently been considered by Glendening and Paulsen (5). Although a serious problem only in the states of Arizona, New Mexico, and Texas, at least one of the three common varieties of Prosopis juliflora now may be found in each of eight southwestern states (2). Its progressive invasion is unquestioned.