Several individuals in the immediate area; n=22 during meiosis of microgametogenesis from individual in cultivation, Chino Valley, Arizona; flower photographed and collected 24 May 2007.
Neotype locality for Mammillaria fasciculata Engelmann in Emory. Several individuals in the immediate area; n=22 during meiosis of microgametogenesis from individual in cultivation, Chino Valley, Arizona; flower photographed and collected 24 May 2007; another flower collected 7 April 2008 from same individual.