]> GH barcode-00053972 United States of America Arizona Organ Pipe Cactus National Monument, Arch Canyon, 22 mi S of Why and 12 mi E of Visitor Center, 31°57'N, 112°40'W, 850 m Vauquelinia californica subsp. sonorensis W. J. Hess & Henrickson W. J. Hess & Henrickson 2010-08-16 16:43:43 W. J. Hess & G. Wilhelm