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Mammillaria egregia
(Syn: Mammillaria lasiacantha ssp. egregia)

CACTUSPEDIA       

 


Mammillaria lasiacantha subsp. egregia SB30 Jimenez, Chihuahua, Mexico
An attractive small snow-white ball with many short spines.  Seldom seen in collections.  Very nice plant.
 

Description: Plants usually unbranched, deep-seated in substrate and inconspicuous.
Stems:
 Spheric, that become somewhat cylindrical with age, grey-green, up to 5 cm in diameter × 2-7 cm tall,
Tubercles: Cylindrical, without latex, axils bare;
Roots:
Diffuse, not enlarged.
Spines: 50 or more per areole, in several series but all equally thin, mostly appressed, white, innocuous, bristle-like, 0,5-6 mm, glabrous, all interpreted as radial, innermost spines shortest.
Central: Absent.
Flowers: Approx 1 cm long and in diameter; dirty greenish-white or cream, usually with sharply defined midstripes of reddish-brown.
Blooming season (In Europe): January to March
Fruits: Scarlet, cylindrical or clavate, 10-25 mm long, with floral remnant persistent, ripening in June-August.
Seed: Black.
 


More than 50 white radials in each areole.


An mature specimen from Vista Hermosa, Querétaro, Mexico (almost 20 years old)
 

Cultivation: This plant is not famous for being easy to cultivate, but in good conditions with excellent ventilation, it grows without difficulty.  It is especially sensitive to over-watering.  So careful watering and an open mineral potting soil are a must.  Avoid the use of peat or other humus sources in the potting mixture.   Don't add limestone to the potting mix, which must be moderately acidic.  Can be sensitive to frost (but if dry plants are resistant to -5° C). Requires maximum sun exposure to reach its full potential and  to achieve success in flowering.  A winter rest that allows the plant to shrivel (perhaps losing up to 25% of its summer height) will encourage flowering and long term survival. Be careful to encourage slow growth.  Provide very good ventilation.

Propagation: Direct sow after last frost. (it usually doesn't  produces offsets).

 

 

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Photo gallery MAMMILLARIA

Family: Cactaceae (Cactus Family)

Scientific name:
Mammillaria lasiacantha subsp. egregia  (Backeberg ex H. Rogozinski & Appenzeller 1989) D. R. Hunt 1998

Origin: Chihuahua and Durango, Mexico. Altitude 800 - 1.900 m.

Conservation status:  Listed in CITES appendix 2.

Common Names include: Golf-ball Pincushion, Lace-spine Cactus
 

Synonyms:

  • Mammillaria egregia Backeb. ex H.Rogozinski & Appenzeller 1989 Basionym
  • Escobariopsis lasiacantha spp. egregia
  • Mammillaria stella-de-tacubaya var. egregia (Backeberg ex Rogozinski & Appenzeller)
    publishred in:  Mitteilungsbl. AFM 30(4): 180. 2006.


 

 



Flowers are white, with a darker midstrip

Photo of conspecific taxa, varieties, forms and cultivars of the Lasiacanthae group. (This taxon has lots of synonyms  whit several controversial varieties and subspecies)



 

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This old page has been moved! Click the link next on the right to enter the new Enciclopedia of Cacti. We hope you find this new site informative and useful.

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