Mammillaria schumannii Hildm. [ Bartschella schumannii (Hildm.) Britton & Rose]
      
no HD illustration available (m3)
6 639690 Mammillaria schumannii Hildm. Cactaceae
N.L. Britton, J.N. Rose, Cact., vol. 4 : t. 7 (1923) [M.E. Eaton]