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Mammillaria lenta is an attractive and rewarding cactus with
dense criss-crossing white spines
The slow growth rate but offsetting habit and unusual large flowers make
it one of the most sought-after species and it is often a show winner.
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Description: Mammillaria lenta is a very slow
growing succulent that branches basally to form quite large flat-topped
mounds of off-white to white with age. Some plants will begin to offset
when just a few cm across, while others are more reluctant to produce
offsets. Slower growing than the somewhat similar
M. plumosa.
Roots: Large, tuberous.
Stems: Flattened globular (or small columnar in cultivation) without latex.,
almost hidden by the white delicate spines, bright green to yellow
green, typically (3-) 5 to 10 cm in diameter, 1 – 2 (or more) cm high.
Offsets may be produced low on the plant, or unusually high near the
growing tip.
Tubercles: Slender conical, somewhat firm.
In the axil there is short, persistent wool and occasionally a
single bristyle.
Areoles: Naked.Parastichy number:
13 - 21.
Radial spines: 30 - 40, dense, fine, soft and close together
giving the effect of looking like a bird's nest glassy white to slightly
yellow, 3 - 7 mm long.
Central spines: Absent.
Flowers: Produces rings of large pure white flowers with a
purplish-pinkish stripe, 20(-25) mm long and 25 mm in diameter. Stigmas
are a bright olive-green. Perianth segment pointed.
Blooming season: April/May. Flowering may be reluctant
unless it is placed in a warm position with high light levels.
Fruits: Clavate, red, up to 10 mm long.
Seeds: Dull black,
diameter approx 1 mm.
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Photo &
©
copyright
by
Irwin Lightstone.
Images may not be copied, downloaded,
or used in any way without the expressed, written permission of the
photographer.
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Photo and ©
copyright by
Mladen Turcinovic (Croatia)
Photo &
©
copyright
by
Irwin Lightstone. |
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Family:
Cactaceae (Cactus
Family)
Scientific name:
Mammillaria lenta K. Brandegee
pubblished in: Zoe 5: 194 (1904)
First description
Origin: Geographic Distribution: Coahuila, Mexico. (Type
locality near Viesca)
Habitat: It grows and clumps in rock
cracks. Altitude 900 - 1.400 m.
Conservation status: Listed in
CITES appendix 2.
Synonyms:
- Neomammillaria lenta
- Chilita lenta
- Escobariopsis lenta
Notes: This species has been referred to as related to
Mammillaria sphacelata which is also found in the same type
locality
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Cultivation: It is a slow growing species. Use
a pot with good drainage and a very
porous
mineral-based potting mix.
Potted
plants are quite
wet-sensitive and easy to rot if over-watered,
especially in winter.
Water
sparingly during the
growing season;
keep very dry in
winter.
Feed with a high potassium
fertilizer in summer.
Usually it is recommended to
over-winter
this plant in a bright and warm greenhouse with
at least 8-10° C , but it has
proved to be quite
frost resistant
(if kept dry, it's hardy as low as -5° C). Outside full sun or
afternoon shade, inside it needs bright light, and some direct sun.
Some plants will offset readily,
and clumps can be produced in a very few years.
Propagation: By direct sowing after last frost, or by
cuttings or
grafting.
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