A very interesting and rare Mammillaria that grows wild in the
sand dunes just only a few meters from mangrove swamp.
Description: Plants clustering. Stems more or
less spherical to short cylindrical, green, to 15 cm high, 4 - 12 cm
in diameter. The areoles are large and woolly , while the
axil is naked.
Spines: Radials : 10 - 12, white with brown tips, 5 - 7 mm long.
Centrals: usually 1 yellowish-brown, to 10 mm long.
Flowers: Creamy white, 10 - 14 mm long to 18 mm long with darker midveins in a ring in the growth
of the previous year.
Fruits: Light purplish, 20-30 mm long.
Subspecies and varieties:
M. heydery ssp. heyderi It has 1 central spine and 15-22
radial spines; Flowers are cream coloured with brownish-greenish
M. heydery ssp. gaumeri It has one central spine and 10-12
radial spines; Flowers are plain creamy-white.
M. heydery ssp. gumifera. It has 1-2 central spines and
10-12 radial spines: Flowers are reddish-white with darker midviens.
M. heydery ssp. hemisphaerica. It has 1 central spine and
9-13 radial spines; Flowers are Cream-colored to dusty pink.
M. heydery ssp. macdougalii. It has 1-2 central spines
which are stouter and 10-12 radials spines; Flowers are cream-colored to
M. heydery ssp. meiacantha. It has one to none central
spines and 5-9 radial spines; Flowers are pink or white with pink mid-viens.
M. heyderi var. applanata It is often the flattest
but otherwise very similar to the The ssp. heyderi and may probably
repesent only a race of the same species.
Mammillaria heyderi ssp gaumerisubsp. gaumeri
(Britton & Rose) D. R. Hunt 1997
Published in : Mammillaria Postscripts 6:10. 1997
Conservation status: Listed in
CITES appendix 2.
Origin: Yucatan, Mexico. Almost Endemic of Savana Chichulu
and perhaps in the nearest forests of Yucatán and Quintana Roo (under
different climate) Altitude just above sea level to 8-25 m.
Habitat: This is a rare species that would delight any naturalist,
it grows in full sun or under shrub canopy half-hidden in the dunes sand
of the beachfront land in the amazing transition zone between the
mangroves - where saltwater occasionally floods in the almost-flat land
- and the scrubby, spiny, arid-land with succulent plants typical of
inland northern Yucatan.
This is an easy to grow species, don't requires any special treatment,
but need as much light as possible without burning the plant to
encourage the heaviest spine formation. Needs a very good drainage with
regular water in summer, dry in winter. Avoid any frost.
Propagation: Seeds, offsets (Allow cut surface
to callous over before planting)
Photo of conspecific taxa, varieties, forms and
cultivars of Mammillaria heyderi.