Mexico, San Luis Potosi, Maricopa County: Grown in cultivation at Desert Botanical Garden, Phoenix, N 33 deg 27' 33sec, W 111 deg 56' 35sec, 1200 ft., 366 m: accession number 1961 6808 1401; originally received as seed 9 May 1959 from an unknown collector, from Mexico, San Luis Potosi, Los Cajones; grown out from seeds at DBG; originally received as Prosopis alba, name changed by RPM 12 February 2008.