mammillaria, by john pilbeam - pag 206
about mammillaria neopalmeri:
central spines from 3 to 5, usually 4, are stronger, needle-like, brownish with darker tips, stright!
in my collection there are m.neopalmeri from carlo zanovello "il sole rarità botaniche" with hooked central spines.
other plants from uhlig-kakteen with stright central spines.
the last two from "vivaio autore" with hooked central spines.
are all of them mammillaria neopalmeri?
this from uhlig-kakteen with stright c.s.
these are with hooked c.s.