Mammillaria duoformis R.T.Craig & E.Y.Dawson in Allan Hancock Found. Publ. Occas. Pap. 2: 59. 1948.

Nomenclatural References

• person : Elmer Yale Dawson (1918-1966) Based on occurrence of standard abbreviation 'E.Y.Dawson' in the authors string.
• person : Robert T. Craig (1902-1986) Based on occurrence of standard abbreviation 'R.T.Craig' in the authors string.
• database : The Plant List version 1.0, record: tro-5103932
• database : The Plant List version 1.1, record: tro-5103932