Mammillaria longiflora (Britton & Rose) A. Berger Mammillaria longiflora (Britton & Rose) A. Berger, Kakteen (Berger): 296. 1929 sec. Guzmán & al. 2003≡Neomammillaria longiflora Britton & Rose, Cactaceae (Britton & Rose) 4: 163. 1923 syn. sec. Guzmán & al. 2003