Mammillaria of the Month
(this will change on a regular basis, and a link to earlier pages will be here)
M. dioica - new form
Mammillaria dioica is a well known and popular species, and it is known to have a number of forms.
Its distribution is very wide, from southern California, USA, to as far as La Paz in the Mexican state of Baja California Sul.
As has been noted in "Mammillaria" by John Pilbeam (see books page), it changes its habit considerably over this extensive range, from thick bodied plants in the north to more narrow stemmed plants in the south.
Its flowers are generally white to yellowish-white, sometimes with a prominent reddish mid-stripe on the petals. However, this form, from far south in Baja California, offers a more consistent pink colour to the flowers. As yet it is not known to have been propagated commercially.