]> ECON barcode-01875392 Mexico Chihuahua Mnpo. de Batopilas. east of bridge over Arroyo Samachique (or Arroyo Guimivo), on north side of Rio Batopilas, between Batopilas and La Bufa Mammillaria grahamii Engelmann Engelmann 2019-02-26 20:54:14 R. A. Bye Jr.