Mammillaria dawsonii (Houghton) R.T.Craig, Mammill. Handb.: 67. 1945
Mammillaria dawsonii, Mammill. Handb.: 67. 1945
is new combination for Neomammillaria dawsonii in Cact. Succ. J. (Los Angeles) 7: 88. 1935
Mammillaria dawsonii, Mammill. Handb.: 67. 1945
Taxon for this name