Published in: Blatt. Kaktenf.
Distribution: South of Pozos, Guanajuato,
Mexico (Calera and road from Pozos to San Jose Iturbide) at 50 or more km from the habitat of M herrerae.
Conservation status: Listed in
CITES appendix 2.
Habitat: It grows at 2150-2200 m
it is a small cactus, usually solitary,
(clusters of stems can be seen in cultivation)
about 2 cm wide and 5-7
cm high, obscured by the spines.
and tubercles without
radial spines (less than in
which has 100 or more),
white, fine and interlacing.
Flower: 3,5 cm long and wide, white (rarely with a
pinkish flush when grown in
Flowering period (in
retained within the spines, but not within the plant
This plant is not famous for being easy to cultivate, but in good
conditions with excellent
it grows without difficulty.
It is especially sensitive to over-watering.
So careful watering and an open
potting soil are a must.
the use of
peat or other
humus sources in the
and eventually add some
Can be sensitive to frost (but if dry they are
resistant to -5° C). It requires maximum
to reach its full potential,
achieve success in
A winter rest that allows the plant to shrivel (perhaps losing up to
25% of its summer height) will encourage flowering and long time
survival. Be careful to encourage slow growth.
Provide very good
Propagation: Direct sow
after last frost. (it usually doesn't produces offsets).