Hello. I have got really nice mammillarias and i wonder what species they could be. There were several plants in each of the pots and i don't know if they are all the same species or different varieties/subspecies. Could you help me with identification?
So maybe check first the number of central spines: the smallest head, nr. 1 has 5. Nr. 2 and nr. 4 has 2 centrals and nr. 3 has 4.
Radial spines: Nr. 1 has about 20 radials, nr. 2 - 15, nr. 3 - 18, nr. 4 has just 10
Colour of spines: numbers 1 and 2 have much brighter spines than 3 and 4. Maybe just becauce of age of the heads?
2. Some mamm. of polythele group?
Some heads are almost spineless but some have 0-1 centrals and 1-5 radial spines.
3. Mamm. backebergiana?
Central spines: nr. 1 - 1-2, nr. 2 and nr. 3 - 2 central spines
Radial spines: every head has 10-12 radial but head nr. 2 has darker all spines