Mammillaria hahniana Werderm.  

Family: Cactaceae

[Mammillaria bravoae R.T. Craig, moreMammillaria hahniana subsp. bravoae (R.T. Craig) D.R. Hunt, Mammillaria hahniana subsp. hahniana Werderm., Mammillaria hahniana subsp. mendeliana (Bravo) D.R. Hunt, Mammillaria hahniana subsp. woodsii (R.T. Craig) D.R. Hunt, Mammillaria mendeliana (Bravo) Werderm., Mammillaria woodsii Krainz]