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Astrophytum myriostigma "multicostatum" CACTUSPEDIA       

 


Astrophytum myriostigma "multicostatum"

 

Description: Astrophytum myriostigma multicostatum  (With multiple ribs) deviates from the well-known standard  A. myriostigma for having six or more ribs instead of five depending on clones. Plants with more than 5 ribs has been found in habitat  (even if  with a very low frequency), but most of the "multicostatum"  found in cultivation are not 100% true A. myriostigma but hybrid that have inherited the adjunctive ribs from one of the ancestor (Presumably A. ornatum). The flower are also very beautiful.
Stem:
Almost spherical, the plants become shortly columnar with age. The stems are smooth and can be over 90 cm tall and 5-10 (-20) cm in diameter.
Spines: None.
Ribs: 6 to 10 (Usually  7 or 8)
Flowers:
Arise from the areole at the tip of the stem on mature plant. up to 5 cm wide (or more), pale-yellow, shining-silk, unlike the 5-ribbed plant.
Blooming season: Spring or late summer, They take up to 6 years to bloom.

 

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Cultivation:
Although regarded as a choice and difficult plant in cultivation it is relatively easy to grow. It is sometime seen as a grafted plant but grows very well on its own roots too. Use mineral, well permeable substratum with little organic matter (peat, humus). Water sparingly from March until October, and keep perfectly dry in winter, at temperatures from 5 to 15 degrees centigrade. (but it is Hardy to -7C for short periods).  In the rest period no high atmospheric humidity!! Sun Exposure: Light shade to full sun.

Propagation: Almost exclusively by seed. Plants are sometimes grafted onto column-shaped cacti.


 

Family: Cactaceae (Cactus Family)

Scientific name:  Astrophytum myriostigma Lemaire
Published in: Cactacearum Genera nova Speciesque novae et omnium in Horto Monvillano cultarum: 4-6 1839 Original description cv. multicostatum

Conservation status: Listed in CITES appendix 2.

 

 



Photo of conspecific taxa, varieties, forms and cultivars of Astrophytum myriostigma:


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