Mammillaria hamiltonhoytea

Mammillaria hamiltonhoytea
n.b.
The original spelling is correct, althought it has frequently been altered to "hamiltonhoytae".

Reppanhagen mantaines this species (althought the plant he pictures does not have a purple flower), and adds the variety below.
Bravo in her latest work reduces it beneath M.obscura.
Hunt mantains his referral in previous pubblications to synonymy with M.gigantea, in spite of its purple flower, interpreting it "as a purple-flowered variant in the M.petterssonii - M.gigantea group."
It is significant that Craig described a yellowish-brown flowered variety (v. flavaflora), said to have the same distribution as the type, quoted as San Moran.
Referred to Mammillaria petterssonii.
Mammillaria - John Pilbeam pag.328

Mammillaria hamiltonhoythea

Mammillaria hamiltonhoythea v. pilensis
Reppenhagen has pulled this name back from the deep, but Hunt's referral to synonymy with M.petterssonii makes sense, especially in view of its lack of original cited locality.
Reppenhagen's offering (rep 800) comes from near Puerto Caroza in Guanajuato, some way south of Pila.


Mammillaria hamiltonhoythea v. pilensis REP 800
REP 800 - Puerto Caroza, 2400m - Guanajuato - Mexico
Referred to Mammillaria gigantea

Mammillaria hamiltonhoythea v. pilensis REP 800
REP 800 - Puerto Caroza, 2400m - Guanajuato - Mexico
Referred to Mammillaria gigantea

Mammillaria hamiltonhoytea v. pilensis LAU 1451
LAU 1451 - Sierra de San Miguel, 1700m - San Luis Potosi - Mexico
Photography and plant from "mammillariamaniac" Jonathan Mohl - Hamburg - Germany