Mammillaria rekoi (Britton & Rose) Vaupel Mammillaria rekoi (Britton & Rose) Vaupel, Nat. Pflanzenfam. [Engler & Prantl] ed. 2. 21: 633. 1925 sec. Hunt 2016≡Neomammillaria rekoi Britton & Rose, Cactaceae (Britton & Rose) 4: 141. 1923 syn. sec. Guzmán & al. 2003