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Mammillaria
humboldtii.
This is one of the more beautiful species with lots of bright
purplish-pink
flowers blooming abundantly in spring,
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Description: Solitary or
clumping (mat forming).
Stems: Depressed globose to globose, light green, to 7 cm high
and in diameter without latex.
Tubercles: Cylindrical, rounded above with wool and white
bristles in the axils.
Radial spines: Up to 80 or more, unequal, small tightly fitting,
low lying pure white, 4 - 6 mm long.
Central spine: None.
Flower: Bright pink-purple, to 25 mm long and 15 mm in diameter.
Fruit: Club shaped, red.
Seed: Black.
Blooming season: April, May.
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Mammillara humboldtii is a sperical, white,
offsetting species with a snowball appearance.
Except for the color of
the flowers, this plant looks like Mammilloydia candida.
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Cultivation: It is a
relatively rapid growing species
. Water regularly in summer, but do
not overwater (Rot prone)
Use pot with good drainage and a very porous potting media,
keep dry in winter.
Feed with a high potassium
fertilizer in summer.
It is quite frost resistant if kept dry, hardy as low as -5° C.
Outside full sun or afternoon shade, inside needs bright light, and some
direct sun.
Easily clustering and easily flowered. Most plants will offset readily,
and clumps can be produced in a few years.
Propagation: Division, direct sow after last
frost. |
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Family:
Cactaceae (Cactus
Family) |
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Scientific name:
Mammillaria humboldtii (often
mispelled M. humboldti) First description by Ehrenberg,
Linnaea 14: 378 (1840)
Origin: Hidalgo, Mexico. Altitude 1.350 - 1.500 m
Conservation status: Listed in
CITES appendix 2.
Common Names include:
Etymology:
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Synonyms:
- Ebnerella humboldtii
- Escobariopsis humboldtii
- Mammillaria candida
- Chilita humboldtii
- Cactus humboldtiia
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 Note: Mammillari
candida is not to be considered a valid a synonym, the
differences between this species and Mammilloydia candida
are substantial. There is an indication of the International Cacaceae
Systematics Group (ICSG) to consider the Mammilloydia as a
separate and distinct genus in the year 2001. The difference is the
seeds that are not pitted and lack perisperm. The Mammilloydia
genus is believed to be a result of
convergent evolution between the Mammillaria and
Neolloydia genera.
Also, in 2001 the ICSG decided that Mammillaria humboldtii
is a separate and different species of Mammilloydia candida,
it is not a synonym as of 2001.
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Cultivation
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