Mammillaria johnstonii var. sancarlensis R.T.Craig, Mammill. Handb.: 99. 1945
Mammillaria johnstonii var. sancarlensis, Mammill. Handb.: 99. 1945
is basionym for Neomammillaria johnstonii var. sancarlensis, Cactaceae: 620. 1981
Mammillaria johnstonii var. sancarlensis, Mammill. Handb.: 99. 1945
Taxon for this name