Echinocereus arizonicus subsp. matudae Echinocereus arizonicus subsp. matudae (Bravo) Rutow in Echinocereenfreund 7: 54. 1994 sec. Baker 20061≡Echinocereus matudae Bravo in Anales Inst. Biol. Univ. Nac. México 31: 119. 1961 syn. sec. ???1. Baker, M. A. 2006: Circumscription of Echinocereus arizonicus subsp. arizonicus: Phenetic analysis of morphological characters in section Triglochidiatus (Cactaceae), part II. – Madroño 4: 388-99Content
