Ortega & Glass 1997.
in: Guia para la Identificacion de Cactaceas Amenazadas de Mexico.
(Identification Guide to the Threatened Cacti of Mexico). CANTE, A.C.,
Origin: Zimapan, Queretaro, Mexico
Habitat: The whole habitat
of this plant (discovered only in 1997) disappeared under the water of a man-made dam.
in nature. The British Cactus and Succulent Society published a very interesting
online article about this new rare plant:
Click here to see the pdf document.
Taxonomy: This plant is a member of
the Mammillaria crinita
complex (Stylothele Series).
authors consider M. sheinvariana
to be a good
species; the others classify it as M. crinita (e.g.
Fritz Maurice accepts the individuality of the new plant
but considers it a
Copyright "British Cactus and Succulent Journal" Vol 21 (1) 45-48
Cultivation: It has
a thick root and is
Sometimes it is
grafted to avoid
rot problems. It
likes warmth (recommended minimum
winter temperature 5° C), but if kept perfectly dry it can easily
survive at winter night temperatures below 0° C (in our
greenhouse no damage at -10° C for a few hours in the winter
2002-2003). Suited for
sunny-bright exposure; it can
airy exposures. It needs
a deep pot
drainage to accommodate its
tuberous root system. Keep dry in
sheinvariana is especially
prone to rot, therefore,
under-pot in a
smaller container filled with very
Propagation: Seeds or
graft. Seeds can be sown in the spring or summer. The seedlings
should not be disturbed until they are well rooted, after which
they can be planted separately in small pots.