Mammillaria nana ssp nana First description by Backeberg, descr. Cact. Nov. 3: 8 (1963)
An easy species that will readily form clumps of small heads. Flowers readily, and for a long period during the early summer. The only cultivation requirement of note is that watering should be done carefully, as the species is a bit prone to root rot.
John Pilbeam (1999) – Mammillaria The Cactus File Handbook – page 202.
First description by Backeberg, descr. Cact. Nov. 3: 8 (1963)
Picture in the galery related to the keyword :
nana ssp nana